[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"layout-global":3,"blog-detail-thermal-resistance-theta-ja-theta-jc-psijt-power-dissipation":84,"blog-related-articles-thermal-resistance-theta-ja-theta-jc-psijt-power-dissipation":115,"blog-categories-sidebar":199,"article-related-products-thermal-resistance-theta-ja-theta-jc-psijt-power-dissipation":229},{"msg":4,"code":5,"data":6},"操作成功",200,{"navTop":7,"footer":36},[8,18,24,30],{"id":9,"parentId":10,"title":11,"name":11,"label":11,"type":12,"url":13,"target":14,"icon":15,"sort":16,"children":17},6,0,"Electronic Components","LINK","\u002Felectronic-components","_self",null,10,[],{"id":19,"parentId":10,"title":20,"name":20,"label":20,"type":12,"url":21,"target":14,"icon":15,"sort":22,"children":23},7,"Manufacturers","\u002Fmanufacturers",20,[],{"id":25,"parentId":10,"title":26,"name":26,"label":26,"type":12,"url":27,"target":14,"icon":15,"sort":28,"children":29},8,"Request Quote","\u002Frequest-quote",30,[],{"id":31,"parentId":10,"title":32,"name":32,"label":32,"type":12,"url":33,"target":14,"icon":15,"sort":34,"children":35},9,"Tutorials","\u002Fresource",40,[],{"groups":37,"logoUrl":15,"socialLinks":15,"contactPhone":15,"contactEmail":80,"address":81,"description":82,"copyright":83},[38,54,65],{"id":39,"title":40,"sort":10,"links":41},2,"Products",[42,44,46,50],{"id":16,"label":43,"href":13,"target":14,"icon":15,"sort":16},"All Products",{"id":45,"label":20,"href":21,"target":14,"icon":15,"sort":22},11,{"id":47,"label":48,"href":49,"target":14,"icon":15,"sort":28},12,"Applications","\u002Fapplications",{"id":51,"label":52,"href":53,"target":14,"icon":15,"sort":34},19,"Series","\u002Fseries",{"id":55,"title":56,"sort":22,"links":57},3,"Services",[58,61],{"id":59,"label":60,"href":27,"target":14,"icon":15,"sort":16},13,"Submit Your Bom",{"id":62,"label":63,"href":64,"target":14,"icon":15,"sort":22},21,"Frequently Asked Questions","\u002Ffaq",{"id":66,"title":67,"sort":28,"links":68},4,"Company",[69,73,76],{"id":70,"label":71,"href":72,"target":14,"icon":15,"sort":16},16,"About Us","\u002Fabout-us",{"id":74,"label":75,"href":33,"target":14,"icon":15,"sort":22},17,"Blog",{"id":77,"label":78,"href":79,"target":14,"icon":15,"sort":28},18,"Contact Octatronics","\u002Fcontact-us","support@octatronics.com","RM502C, 5\u002FF, HO KING COMM CTR, 2-16 FAYUEN ST, MONGKOK KOWLOON, HONG KONG","Octatronics is a trusted sourcing platform for semiconductors and electronic components.","@2026 Octatronics. All rights reserved.",{"id":85,"title":86,"slug":87,"summary":88,"content":89,"coverImage":90,"category":15,"tags":15,"author":91,"viewCount":92,"isPublished":93,"isTop":94,"seoTitle":95,"seoDesc":96,"seoKeywords":15,"faqJson":15,"publishTime":97,"categoryId":39,"authorId":55,"articleCategory":98,"articleAuthor":101,"delFlag":94,"createBy":107,"createTime":97,"updateBy":107,"updateTime":108,"productCategoryIds":109,"manufacturerIds":113,"applicationIds":114},24,"Thermal Resistance Explained: thetaJA, thetaJC, psiJT, Power Dissipation, and Derating","thermal-resistance-theta-ja-theta-jc-psijt-power-dissipation","Thermal resistance metrics such as thetaJA, thetaJC, and psiJT help estimate semiconductor junction temperature, but each metric has a different purpose. thetaJA is useful for standardized package comparison, thetaJC applies to controlled case or heat-sink paths, and psiJT is often used with measured package-top temperature. Buyers should review thermal data before approving power ICs, regulators, MOSFETs, and package substitutions because identical electrical ratings do not guarantee the same thermal margin.","\u003Cp>Thermal resistance describes how easily heat moves from a semiconductor junction to another point, such as the ambient air, case, board, or package top. The most common datasheet metrics are thetaJA, thetaJC, thetaJB, psiJT, and psiJB. They are not interchangeable. thetaJA is useful for comparing packages under standardized test conditions, thetaJC is mainly for controlled case or heat-sink paths, and psiJT is often better for estimating junction temperature from a measured package-top temperature.\u003C\u002Fp>\u003Cp>For component buyers, thermal resistance is not just an engineering detail. It affects whether a regulator, MOSFET, driver, power switch, amplifier, or processor can survive the target load, enclosure temperature, PCB copper area, and airflow. When sourcing \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fintegrated-circuits-ics\u002Fpower-management-ics\u002Fpower-switch-ics-power-distribution\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">power management ICs\u003C\u002Fa>, \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fintegrated-circuits-ics\u002Fpower-management-ics\u002Fvoltage-regulators-linear\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">linear voltage regulators\u003C\u002Fa>, or \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fdiscrete-semiconductors\u002Ftransistors\u002Fmosfets\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">MOSFETs\u003C\u002Fa>, thermal metrics should be checked before approving a package substitution.\u003C\u002Fp>\u003Ch2>Why Thermal Resistance Matters in Component Selection\u003C\u002Fh2>\u003Cp>Two devices can share the same electrical rating but behave very differently in a real product. A linear regulator may look acceptable at 1 A on the first page of the datasheet, but fail in a sealed enclosure if the input-to-output voltage drop creates too much heat. A MOSFET with a low RDS(on) may still overheat if its package cannot remove heat through the PCB. An interface IC may pass bench testing but drift or reset when installed near a motor drive, LED module, or industrial power supply.\u003C\u002Fp>\u003Cp>Thermal analysis helps answer four practical sourcing questions:\u003C\u002Fp>\u003Ctable>\u003Ctbody>\u003Ctr>\u003Ctd>Buyer question\u003C\u002Ftd>\u003Ctd>Thermal metric involved\u003C\u002Ftd>\u003Ctd>Procurement impact\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Can this package dissipate the expected power?\u003C\u002Ftd>\u003Ctd>thetaJA, board copper, airflow\u003C\u002Ftd>\u003Ctd>Smaller packages may need derating or a larger footprint\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Can the device be used with a heat sink or thermal pad?\u003C\u002Ftd>\u003Ctd>thetaJC, thetaJB\u003C\u002Ftd>\u003Ctd>Package construction and exposed pad options matter\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Can the junction temperature be estimated during test?\u003C\u002Ftd>\u003Ctd>psiJT, psiJB\u003C\u002Ftd>\u003Ctd>Supports incoming inspection and qualification\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Is a proposed alternate truly drop-in?\u003C\u002Ftd>\u003Ctd>All thermal metrics plus PCB layout\u003C\u002Ftd>\u003Ctd>Same pinout does not guarantee same thermal margin\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Cp>Thermal resistance is especially important for \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fdiscrete-semiconductors\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">discrete semiconductors\u003C\u002Fa>, power ICs, LED drivers, motor drivers, load switches, LDO regulators, hot-swap controllers, and any component used near the upper end of its current, voltage, or temperature rating.\u003C\u002Fp>\u003Ch2>Key Thermal Terms\u003C\u002Fh2>\u003Ctable>\u003Ctbody>\u003Ctr>\u003Ctd>Term\u003C\u002Ftd>\u003Ctd>Meaning\u003C\u002Ftd>\u003Ctd>How buyers should use it\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Junction temperature, TJ\u003C\u002Ftd>\u003Ctd>Temperature at the active silicon junction\u003C\u002Ftd>\u003Ctd>Compare against the maximum TJ rating, not only ambient temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Ambient temperature, TA\u003C\u002Ftd>\u003Ctd>Air temperature around the device\u003C\u002Ftd>\u003Ctd>Consider enclosure temperature, not just room temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Case temperature, TC\u003C\u002Ftd>\u003Ctd>Temperature at a defined package surface\u003C\u002Ftd>\u003Ctd>Useful when a heat sink, metal tab, or package top is measured\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Board temperature, TB\u003C\u002Ftd>\u003Ctd>PCB temperature near the package\u003C\u002Ftd>\u003Ctd>Useful for packages that dissipate heat mainly through copper\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Power dissipation, PD\u003C\u002Ftd>\u003Ctd>Heat generated inside the part\u003C\u002Ftd>\u003Ctd>Must be estimated from load current, voltage drop, switching loss, or conduction loss\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Thermal resistance\u003C\u002Ftd>\u003Ctd>Temperature rise per watt, usually degC\u002FW\u003C\u002Ftd>\u003Ctd>Lower values generally indicate easier heat flow under the stated test condition\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Ch2>thetaJA: Junction-to-Ambient Thermal Resistance\u003C\u002Fh2>\u003Cp>thetaJA is the thermal resistance from the semiconductor junction to ambient air. It is commonly listed in degC\u002FW.\u003C\u002Fp>\u003Cp>A simple first-pass equation is:\u003C\u002Fp>TJ = TA + (PD x thetaJA)\u003Cp>If ambient temperature is 60 degC, power dissipation is 0.8 W, and thetaJA is 55 degC\u002FW, the estimated junction temperature is:\u003C\u002Fp>TJ = 60 + (0.8 x 55) = 104 degC\u003Cp>That result must then be compared with the device maximum junction temperature and the desired design margin.\u003C\u002Fp>\u003Cp>The trap: thetaJA is measured under a defined board and environment. It is not a universal constant. A small PCB, limited copper, no thermal vias, a plastic enclosure, or nearby heat sources can make the real system much hotter than the datasheet example.\u003C\u002Fp>\u003Cp>Use thetaJA to:\u003C\u002Fp>\u003Col>\u003Cli>Compare similar packages under similar datasheet conditions.\u003C\u002Fli>\u003Cli>Make a conservative first-pass temperature estimate.\u003C\u002Fli>\u003Cli>Screen out packages that obviously cannot meet the thermal requirement.\u003C\u002Fli>\u003C\u002Fol>\u003Cp>Do not use thetaJA as the only approval criterion for high-power designs.\u003C\u002Fp>\u003Ch2>thetaJC: Junction-to-Case Thermal Resistance\u003C\u002Fh2>\u003Cp>thetaJC is the thermal resistance from the junction to a defined case surface. It is most useful when heat is intentionally forced through that case surface, such as a metal tab, package bottom, or heat-sink path.\u003C\u002Fp>\u003Cp>Common variations include:\u003C\u002Fp>\u003Ctable>\u003Ctbody>\u003Ctr>\u003Ctd>Metric\u003C\u002Ftd>\u003Ctd>Heat path\u003C\u002Ftd>\u003Ctd>Typical relevance\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>thetaJC(top)\u003C\u002Ftd>\u003Ctd>Junction to package top\u003C\u002Ftd>\u003Ctd>Heat sink attached to package top\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>thetaJC(bottom)\u003C\u002Ftd>\u003Ctd>Junction to exposed pad or package bottom\u003C\u002Ftd>\u003Ctd>Exposed-pad packages, thermal vias, metal-core boards\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>thetaJC(case\u002Ftab)\u003C\u002Ftd>\u003Ctd>Junction to tab or case\u003C\u002Ftd>\u003Ctd>TO, DPAK, power packages\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Cp>The trap: a low thetaJC number does not mean the device will run cool on every PCB. If most heat cannot actually leave through the measured case path, thetaJC will overstate real-world thermal performance.\u003C\u002Fp>\u003Cp>For \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fdiscrete-semiconductors\u002Ftransistors\u002Fmosfets\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">MOSFETs\u003C\u002Fa>, thetaJC and safe operating area should be reviewed together. Infineon notes in its MOSFET design guidance that package limits, die area, current handling, and safe operating area all affect reliable operation, not just nominal RDS(on).\u003C\u002Fp>\u003Ch2>psiJT and psiJB: Thermal Characterization Parameters\u003C\u002Fh2>\u003Cp>psiJT is a thermal characterization parameter from junction to package top. psiJB is from junction to board. These are often used to estimate junction temperature from a measured surface or board temperature.\u003C\u002Fp>\u003Cp>Typical equation:\u003C\u002Fp>TJ = TT + (PD x psiJT)\u003Cp>Where TT is the measured package-top temperature.\u003C\u002Fp>\u003Cp>The key difference is that psi values are not pure thermal resistances like theta values. They are measurement-based characterization parameters. They can be more useful for real system temperature estimation when the measurement setup resembles the actual product.\u003C\u002Fp>\u003Cp>Use psiJT when:\u003C\u002Fp>\u003Col>\u003Cli>You can measure package-top temperature with a thermocouple or IR camera.\u003C\u002Fli>\u003Cli>You know the actual power dissipation.\u003C\u002Fli>\u003Cli>You need to estimate junction temperature during prototype validation.\u003C\u002Fli>\u003C\u002Fol>\u003Ch2>How to Calculate Power Dissipation\u003C\u002Fh2>\u003Cp>Thermal calculations are only as good as the power estimate. Different parts require different power models.\u003C\u002Fp>\u003Ctable>\u003Ctbody>\u003Ctr>\u003Ctd>Component type\u003C\u002Ftd>\u003Ctd>First-pass power estimate\u003C\u002Ftd>\u003Ctd>Watch-outs\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Linear regulator\u003C\u002Ftd>\u003Ctd>(VIN - VOUT) x IOUT\u003C\u002Ftd>\u003Ctd>Dropout, peak load, package copper\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>MOSFET, DC conduction\u003C\u002Ftd>\u003Ctd>I^2 x RDS(on)\u003C\u002Ftd>\u003Ctd>RDS(on) rises with temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>MOSFET, switching\u003C\u002Ftd>\u003Ctd>Conduction loss + switching loss + gate drive loss\u003C\u002Ftd>\u003Ctd>SOA, avalanche, transient heating\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Diode\u003C\u002Ftd>\u003Ctd>VF x IF\u003C\u002Ftd>\u003Ctd>VF changes with current and temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Power switch IC\u003C\u002Ftd>\u003Ctd>I^2 x RON plus switching\u002Ftransient loss\u003C\u002Ftd>\u003Ctd>Current limit and thermal shutdown are not design margins\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>LED driver\u003C\u002Ftd>\u003Ctd>IC loss plus external switch\u002Fdiode loss\u003C\u002Ftd>\u003Ctd>Ambient, enclosure, LED board heating\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Op amp or driver\u003C\u002Ftd>\u003Ctd>Supply power plus output load power\u003C\u002Ftd>\u003Ctd>Output short-circuit and capacitive load cases\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Cp>For linear regulators and other \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fc\u002Fintegrated-circuits-ics\u002Fpower-management-ics\u002Fpower-switch-ics-power-distribution\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">power management ICs\u003C\u002Fa>, the heat can be surprisingly high even at modest current. A 12 V to 5 V regulator at 200 mA dissipates 1.4 W, which can exceed the thermal capability of a small package without enough copper.\u003C\u002Fp>\u003Ch2>Thermal Resistance vs Derating\u003C\u002Fh2>\u003Cp>Thermal resistance helps estimate junction temperature. Derating decides whether the design has enough margin after considering temperature, load, aging, airflow, and manufacturing variation.\u003C\u002Fp>\u003Cp>For procurement, thermal derating is important because an alternate component may match the electrical rating but have:\u003C\u002Fp>\u003Col>\u003Cli>A smaller package.\u003C\u002Fli>\u003Cli>Higher thetaJA.\u003C\u002Fli>\u003Cli>Different exposed pad geometry.\u003C\u002Fli>\u003Cli>Lower maximum junction temperature.\u003C\u002Fli>\u003Cli>Different recommended land pattern.\u003C\u002Fli>\u003Cli>Weaker safe operating area.\u003C\u002Fli>\u003Cli>Different package material or moisture sensitivity.\u003C\u002Fli>\u003C\u002Fol>\u003Cp>This is why a pin-compatible substitute should still be reviewed against thermal data before approval. Octatronics also covers broader sourcing checks in \u003Ca href=\\\"https:\u002F\u002Foctatronics.com\u002Fresource\u002Fcomponents-guide\u002Fhow-to-choose-electronic-components-for-reliable-hardware-design\\\" rel=\\\"noopener noreferrer\\\" target=\\\"_blank\\\">How to Choose Electronic Components for Reliable Hardware Design\u003C\u002Fa>.\u003C\u002Fp>\u003Ch2>Thermal Comparison Checklist for Buyers\u003C\u002Fh2>\u003Cp>Use this checklist before approving a new part number, alternate, or package code.\u003C\u002Fp>\u003Ctable>\u003Ctbody>\u003Ctr>\u003Ctd>Check\u003C\u002Ftd>\u003Ctd>Why it matters\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Maximum junction temperature\u003C\u002Ftd>\u003Ctd>Defines absolute silicon limit\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Operating ambient temperature\u003C\u002Ftd>\u003Ctd>Industrial and automotive designs often run far above room temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Power dissipation at worst-case load\u003C\u002Ftd>\u003Ctd>Determines actual heat generation\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>thetaJA test board condition\u003C\u002Ftd>\u003Ctd>Datasheet value may assume more copper than your board\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>thetaJC or thermal pad path\u003C\u002Ftd>\u003Ctd>Needed for heat-sink, tab, or exposed-pad packages\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>psiJT or psiJB availability\u003C\u002Ftd>\u003Ctd>Helps validate prototypes by measurement\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>PCB copper and via requirement\u003C\u002Ftd>\u003Ctd>Many small packages rely on board copper\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>SOA or transient thermal data\u003C\u002Ftd>\u003Ctd>Critical for MOSFETs and pulsed loads\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Package height and airflow\u003C\u002Ftd>\u003Ctd>Enclosure and neighboring heat sources affect real temperature\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Thermal shutdown behavior\u003C\u002Ftd>\u003Ctd>Protection feature, not a normal operating point\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Ch2>Common Procurement Mistakes\u003C\u002Fh2>\u003Ch3>Mistake 1: Treating thetaJA as a fixed property\u003C\u002Fh3>\u003Cp>thetaJA depends on board layout, copper area, vias, airflow, and test environment. A datasheet value should be treated as a comparison metric unless the application matches the test condition.\u003C\u002Fp>\u003Ch3>Mistake 2: Replacing a power part by pinout alone\u003C\u002Fh3>\u003Cp>A pin-compatible regulator, load switch, driver, or MOSFET may have a different package thermal path. Same footprint does not always mean same thermal performance.\u003C\u002Fp>\u003Ch3>Mistake 3: Ignoring transient thermal stress\u003C\u002Fh3>\u003Cp>Short pulses can still damage MOSFETs, TVS diodes, resistors, and drivers if the transient energy exceeds the safe operating area or pulse rating.\u003C\u002Fp>\u003Ch3>Mistake 4: Measuring case temperature but using the wrong equation\u003C\u002Fh3>\u003Cp>For package-top measurement, psiJT is often more appropriate than thetaJC(top) for estimating junction temperature. Check the manufacturer's guidance.\u003C\u002Fp>\u003Ch2>FAQ\u003C\u002Fh2>\u003Ch3>What is thermal resistance in an IC datasheet?\u003C\u002Fh3>\u003Cp>Thermal resistance is a measure of temperature rise per watt of power dissipation. It helps estimate how hot a semiconductor junction may become under load.\u003C\u002Fp>\u003Ch3>Is thetaJA the same as real operating temperature?\u003C\u002Fh3>\u003Cp>No. thetaJA is measured under specified test conditions. Real temperature depends on PCB copper, airflow, enclosure, neighboring heat sources, and actual power dissipation.\u003C\u002Fp>\u003Ch3>What is the difference between thetaJA and thetaJC?\u003C\u002Fh3>\u003Cp>thetaJA describes heat flow from junction to ambient air under a defined condition. thetaJC describes heat flow from junction to a defined case surface, often for heat-sink or controlled heat-flow designs.\u003C\u002Fp>\u003Ch3>What is psiJT used for?\u003C\u002Fh3>\u003Cp>psiJT is used to estimate junction temperature from a measured package-top temperature and known power dissipation. It is useful during prototype validation.\u003C\u002Fp>\u003Ch3>Can a lower RDS(on) MOSFET still overheat?\u003C\u002Fh3>\u003Cp>Yes. RDS(on), package thermal resistance, safe operating area, board layout, switching loss, and transient stress all affect MOSFET temperature.\u003C\u002Fp>","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Fthermal-resistance-theta-ja-theta-jc-psijt-power-dissipation-cover.webp","Octatronics",33,"1","0","Thermal Resistance Explained: thetaJA, thetaJC, psiJT | Octatronics","Learn how to read IC thermal resistance metrics such as thetaJA, thetaJC, psiJT, junction temperature, power dissipation, and derating before selecting power ICs, MOSFETs, regulators, and industrial semiconductors.","2026-06-24T06:56:22.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},"Technical Knowledge","technical-knowledge",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":55,"name":102,"avatar":103,"role":104,"expertise":105,"intro":106,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"Michael Anderson","\u002Fprofile\u002Fupload\u002F2026\u002F05\u002F03\u002Fmichael-anderson_20260503222635A003.jpg","Semiconductor Technical Writer","Device physics, integrated circuits, analog and digital electronics, power devices","Michael Anderson is a semiconductor technical writer covering device physics, integrated circuits, analog electronics, and power semiconductor technologies. He creates educational content that connects fundamental semiconductor theory with real engineering applications.\n\nHis articles explain topics such as p-n junctions, diodes, transistors, MOSFETs, operational amplifiers, power management ICs, and system-level semiconductor design. Michael’s writing is designed for engineers, students, and technical buyers who want accurate, structured, and application-oriented semiconductor knowledge.","admin","2026-06-28T23:19:00.000+08:00",[110,111,112],32,146,155,[],[],[116,129,138,150,161,170,179,190],{"id":117,"title":118,"slug":119,"summary":120,"content":15,"coverImage":121,"category":15,"tags":15,"author":91,"viewCount":122,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":123,"categoryId":39,"authorId":124,"articleCategory":125,"articleAuthor":126,"delFlag":15,"createBy":15,"createTime":123,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},23,"IC Top Marking Codes Explained: How to Identify SMD Chips from Package Markings","ic-top-marking-codes-smd-chip-identification","IC top marking codes are abbreviated package markings used to identify semiconductor devices, especially small SMD chips that cannot fit a full part number. Buyers should use the marking as a starting point, then verify manufacturer logo, package, pin count, date code, lot code, datasheet, packing label, and supplier documentation. Official manufacturer marking tools and datasheets should be used before relying on third-party SMD code databases.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Fic-top-marking-codes-smd-chip-identification-cover.webp",79,"2026-06-24T06:53:56.000+08:00",1,{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":124,"name":127,"avatar":128,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"David Chen","\u002Fprofile\u002Fupload\u002F2026\u002F05\u002F03\u002Fdavid-chen_20260503222607A002.jpg",{"id":39,"title":130,"slug":131,"summary":132,"content":15,"coverImage":133,"category":15,"tags":15,"author":91,"viewCount":134,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":135,"categoryId":39,"authorId":124,"articleCategory":136,"articleAuthor":137,"delFlag":15,"createBy":15,"createTime":135,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},"Semiconductor Basics: From Device Physics to System-Level Design","semiconductor-basics-device-physics-system-design","Learn semiconductor basics from device physics and p-n junctions to diodes, transistors, ICs, power devices, datasheet parameters, reliability, and system-level hardware design.","\u002Fprofile\u002Fupload\u002Fblog\u002Fundefined\u002Fcover-2.webp",216,"2026-05-03T17:59:06.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":124,"name":127,"avatar":128,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},{"id":139,"title":140,"slug":141,"summary":142,"content":15,"coverImage":143,"category":15,"tags":15,"author":91,"viewCount":144,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":145,"categoryId":39,"authorId":39,"articleCategory":146,"articleAuthor":147,"delFlag":15,"createBy":15,"createTime":145,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},27,"Circuit Board Component Identification: How to Identify PCB Components by Markings, Shape, and Codes","circuit-board-component-identification-guide","Circuit board component identification means recognizing PCB parts by their reference designators, physical appearance, body markings, polarity marks, package type, and electrical function. The fastest way to identify a component is to start with the PCB silkscreen, match the reference letter to a component type, inspect its shape and package, read any value or top marking, then confirm the result with a datasheet, schematic, BOM, or measurement tool.\nThis guide explains how to identify common PCB components such as resistors, capacitors, inductors, diodes, transistors, MOSFETs, ICs, connectors, fuses, relays, crystals, and test points. It also includes practical examples, common marking codes, polarity clues, mistakes to avoid, and a replacement sourcing checklist.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Fcircuit-board-component-identification-guide-cover.webp",56,"2026-06-28T12:28:21.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":148,"avatar":149,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"Emily Roberts","\u002Fprofile\u002Fupload\u002F2026\u002F05\u002F03\u002Femily-roberts_20260503222557A001.jpg",{"id":151,"title":152,"slug":153,"summary":154,"content":15,"coverImage":155,"category":15,"tags":15,"author":91,"viewCount":156,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":157,"categoryId":39,"authorId":39,"articleCategory":158,"articleAuthor":159,"delFlag":15,"createBy":15,"createTime":160,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},37,"RF Wireless Components for Long-Range IoT: Transceivers, RF Switches, Front-End Parts and Interface ICs","rf-wireless-components-long-range-iot","Long-range IoT is a system design problem. The RF transceiver or module is central, but it does not work alone. RF switches, front-end components, antennas, interface ICs, power management, sensors, protection devices and connectors all influence real-world performance. Engineers should choose RF wireless components by starting from the application requirements and then building a complete link, power and interface strategy around them.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Frf-wireless-components-long-range-iot-cover.webp",26,"2026-07-15T16:02:07.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":148,"avatar":149,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"2026-07-14T23:46:52.000+08:00",{"id":92,"title":162,"slug":163,"summary":164,"content":15,"coverImage":165,"category":15,"tags":15,"author":91,"viewCount":151,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":166,"categoryId":39,"authorId":124,"articleCategory":167,"articleAuthor":168,"delFlag":15,"createBy":15,"createTime":169,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},"PNP Bipolar Junction Transistor (BJT): Definition, Working Principle, and Core Electronics Concepts","pnp-bipolar-junction-transistor-bjt-explained","The PNP bipolar junction transistor is a current-controlled semiconductor device used in switching and amplification. This guide explains its working principle, structure, biasing behavior, and differences compared to NPN transistors in a clear, structured format for electronics learners and engineers.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Fpnp-bipolar-junction-transistor-bjt-explained-cover.webp","2026-07-06T22:57:53.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":124,"name":127,"avatar":128,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"2026-07-06T14:57:52.000+08:00",{"id":171,"title":172,"slug":173,"summary":174,"content":15,"coverImage":175,"category":15,"tags":15,"author":91,"viewCount":171,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":176,"categoryId":39,"authorId":124,"articleCategory":177,"articleAuthor":178,"delFlag":15,"createBy":15,"createTime":176,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},29,"Field Emission Transistor Explained: Vacuum FETs, Field Emission Devices, and How They Differ from FETs","field-emission-transistor-explained","A field emission transistor is a device concept that uses strong electric fields to extract electrons from an emitter, often through quantum tunneling, and then controls or collects those electrons using nearby electrodes. Unlike a conventional field effect transistor, which controls current through a semiconductor channel, many field emission transistor concepts are related to vacuum electronics, vacuum field emission transistors, nanoscale vacuum channel transistors, and advanced field emission devices.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Ffield-emission-transistor-explained-cover.webp","2026-06-28T22:54:31.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":124,"name":127,"avatar":128,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},{"id":55,"title":180,"slug":181,"summary":182,"content":15,"coverImage":183,"category":99,"tags":184,"author":102,"viewCount":185,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":186,"categoryId":39,"authorId":55,"articleCategory":187,"articleAuthor":188,"delFlag":15,"createBy":15,"createTime":189,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},"What Is an Integrated Circuit? Types, Functions, and Common Applications","what-is-an-integrated-circuit","Learn what an integrated circuit is, how ICs differ from discrete circuits, the major IC types, common applications, package considerations, and how engineers and buyers evaluate ICs.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Fwhat-is-an-integrated-circuit-cover.webp","integrated circuit, IC basics, semiconductor IC, analog IC, digital IC, mixed-signal IC",47,"2026-05-23T10:00:00.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":55,"name":102,"avatar":103,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},"2026-05-24T07:20:27.000+08:00",{"id":191,"title":192,"slug":193,"summary":194,"content":15,"coverImage":195,"category":15,"tags":15,"author":91,"viewCount":171,"isPublished":93,"isTop":94,"seoTitle":15,"seoDesc":15,"seoKeywords":15,"faqJson":15,"publishTime":196,"categoryId":39,"authorId":39,"articleCategory":197,"articleAuthor":198,"delFlag":15,"createBy":15,"createTime":196,"updateBy":15,"updateTime":15,"productCategoryIds":15,"manufacturerIds":15,"applicationIds":15},28,"What Is a Field Effect Transistor? FET Types, Working Principle, Applications, and Selection Guide","field-effect-transistor-fet","A Field Effect Transistor, commonly called a FET, is a voltage-controlled semiconductor device that uses an electric field to control current flow between two terminals called the source and drain. Unlike bipolar junction transistors, which require input current at the base, FETs are controlled mainly by voltage at the gate terminal. This gives FETs high input impedance, low control power, and strong advantages in switching, amplification, power management, RF circuits, sensor interfaces, and modern integrated circuits.","\u002Fprofile\u002Fupload\u002Fblog\u002F2026\u002F06\u002F14\u002Ffield-effect-transistor-fet-cover.webp","2026-06-28T12:59:46.000+08:00",{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":99,"slug":100,"orderNum":15,"delFlag":15},{"createBy":15,"createTime":15,"updateBy":15,"updateTime":15,"remark":15,"id":39,"name":148,"avatar":149,"role":15,"expertise":15,"intro":15,"facebook":15,"youtube":15,"linkedin":15,"twitter":15,"delFlag":15},[200,206,210,216,222],{"createBy":107,"createTime":201,"updateBy":107,"updateTime":202,"remark":203,"id":55,"name":204,"slug":205,"orderNum":124,"delFlag":94},"2026-04-10 07:22:11","2026-04-30 21:31:18","元件选型差异、Pin-to-Pin 替代方案、封装与硬核硬件设计指南。\n\n这个分类非常适合做 SEO 流量。\n\n主要写：\n\n电子元器件选型指南\n某类元件怎么选\n某个型号与替代型号区别\nPin-to-Pin 替代方案\n封装差异\n参数对比\n选型错误避坑\n\n适合文章例子：\n\nHow to Choose the Right MOSFET for Your Circuit\nSMD Capacitor Package Sizes Explained\nLDO vs Switching Regulator: Which One Should You Use?\nTUSB3410VF vs TUSB3410VFG4: What Is the Difference?\n\n这个分类以后最容易带来精准询盘，因为搜索这些内容的人很多是工程师或采购。","Components Guide","components-guide",{"createBy":107,"createTime":207,"updateBy":107,"updateTime":208,"remark":209,"id":39,"name":99,"slug":100,"orderNum":39,"delFlag":94},"2026-04-10 07:20:22","2026-04-30 21:31:47","半导体底层原理、系统架构深度解析、高阶技术白皮书\n\n这个分类适合做专业度和 EEAT。\n\n主要写：\n\n半导体基础原理\n电路基础\n系统架构\n通信接口\n电源设计基础\n模拟\u002F数字\u002F射频知识\n工程概念解释\n\n适合文章例子：\n\nWhat Is a PN Junction?\nWhat Does an Op-Amp Do?\nI2C vs SPI vs UART Explained\nWhat Is a Voltage Reference?\nHow ADC Resolution Affects Measurement Accuracy\n\n注意：\n这个分类不要写成纯科普百科，要尽量和元器件、BOM、选型、应用场景连接起来。否则容易有流量但转化弱。",{"createBy":107,"createTime":211,"updateBy":107,"updateTime":212,"remark":213,"id":124,"name":214,"slug":215,"orderNum":55,"delFlag":94},"2026-04-03 22:42:14","2026-04-30 21:32:17","厂商并购、新厂动态、全球半导体政策及原厂重大公告。\n\n这个分类适合让网站看起来“活跃”，但不是最优先的 SEO 分类。\n\n主要写：\n\n半导体厂商并购\n新工厂扩产\n政策变化\n原厂公告\n行业重大事件\nAI、汽车、工业、存储、功率半导体动态\n\n适合文章例子：\n\nSemiconductor Industry Trends in 2026\nHow AI Demand Is Changing the Semiconductor Supply Chain\nMajor Power Semiconductor Trends for Industrial Electronics\n\n但是要注意：\nIndustry News 内容时效性强，过期快。 刚上线可以放 2–3 篇撑门面，但不要把主要精力放这里。","Industry News","semiconductor-industry-news",{"createBy":107,"createTime":217,"updateBy":107,"updateTime":218,"remark":219,"id":66,"name":220,"slug":221,"orderNum":66,"delFlag":94},"2026-04-10 07:33:53","2026-04-30 21:32:30","交期（Lead Time）趋势分析、价格波动、供应链风险预警（采购必看）。\n\n这个分类对 Octatronics 很有价值，因为它更贴近采购决策。\n\n主要写：\n\nLead time 趋势\n价格波动\n缺货风险\nEOL 风险\n供应链风险\n采购策略\n替代料策略\nBOM 成本控制\n\n适合文章例子：\n\nElectronic Component Lead Times: What Buyers Should Watch\nWhy Some IC Prices Rise During Shortage Cycles\nHow to Reduce BOM Sourcing Risk\nObsolete Components: How to Plan Before Production Stops\n\n这个分类是给采购、供应链经理、OEM、EMS 看，非常适合引导 RFQ。","Market Insights","market-insights",{"createBy":107,"createTime":223,"updateBy":107,"updateTime":224,"remark":225,"id":226,"name":227,"slug":228,"orderNum":226,"delFlag":94},"2026-04-10 07:34:12","2026-04-30 21:36:18","新产品系列上架、EOL（停产）预警、Datasheet 核心变更说明\n\n\n这个分类本身合理，但名字有一点偏“公司自己产品更新”的感觉。Octatronics 不是原厂，所以 Product Updates 需要定义清楚。\n\n可以写：\n\n新品系列介绍\nEOL 停产预警\nPCN 变更\nDatasheet 更新\n原厂推荐替代型号\n某系列器件更新\n某个品牌产品线变化\n\n适合文章例子：\n\nHow to Read an EOL Notice for Electronic Components\nWhat Is a Product Change Notification?\nDatasheet Revision: What Engineers Should Check\nHow to Evaluate Manufacturer Recommended Replacements\n\n如果想更准确，我建议把分类名改成：\n\nProduct Updates & Lifecycle\n\n或者：\n\nProduct Lifecycle Updates\n\n这样更符合电子元器件分销商的内容定位。",5,"Product News","product-news",[230,239,248,258,267,272,276,283,290,297],{"id":231,"mpn":232,"title":-1,"manufacturer":233,"manufacturerSlug":234,"categoryName":235,"categorySlug":236,"categorySlugPath":237,"shortDesc":-1,"coverImageUrl":-1,"slug":238},428665,"TL432BQDBVRE4","Texas Instruments","texas-instruments","Voltage References","voltage-references","integrated-circuits-ics\u002Fpower-management-ics\u002Fvoltage-references","texas-instruments-tl432bqdbvre4",{"id":240,"mpn":241,"title":-1,"manufacturer":242,"manufacturerSlug":243,"categoryName":244,"categorySlug":245,"categorySlugPath":246,"shortDesc":-1,"coverImageUrl":-1,"slug":247},238662,"MIC23050-GYML-TR","Microchip Technology","microchip-technology","DC DC Switching Regulators","dc-dc-switching-regulators","integrated-circuits-ics\u002Fpower-management-ics\u002Fdc-dc-switching-regulators","microchip-technology-mic23050-gyml-tr",{"id":249,"mpn":250,"title":-1,"manufacturer":251,"manufacturerSlug":252,"categoryName":253,"categorySlug":254,"categorySlugPath":255,"shortDesc":256,"coverImageUrl":-1,"slug":257},29800,"DMTH10H003SPSW-13","Diodes Incorporated","diodes-incorporated","MOSFETs","mosfets","discrete-semiconductors\u002Ftransistors\u002Fmosfets","MOSFET BVDSS: 61V~100V POWERDI50","diodes-incorporated-dmth10h003spsw-13",{"id":259,"mpn":260,"title":-1,"manufacturer":261,"manufacturerSlug":262,"categoryName":263,"categorySlug":264,"categorySlugPath":265,"shortDesc":-1,"coverImageUrl":-1,"slug":266},149573,"LTC2930CDD#PBF","Analog Devices","analog-devices","Power Supply Controllers and Monitors","power-supply-controllers-monitors","integrated-circuits-ics\u002Fpower-management-ics\u002Fpower-supply-controllers-monitors","analog-devices-ltc2930cdd-pbf",{"id":268,"mpn":269,"title":-1,"manufacturer":270,"manufacturerSlug":270,"categoryName":244,"categorySlug":245,"categorySlugPath":246,"shortDesc":-1,"coverImageUrl":-1,"slug":271},287668,"FAN5602MU33X","onsemi","onsemi-fan5602mu33x",{"id":273,"mpn":274,"title":-1,"manufacturer":233,"manufacturerSlug":234,"categoryName":244,"categorySlug":245,"categorySlugPath":246,"shortDesc":-1,"coverImageUrl":-1,"slug":275},435220,"TPS542941RSAR","texas-instruments-tps542941rsar",{"id":277,"mpn":278,"title":-1,"manufacturer":261,"manufacturerSlug":262,"categoryName":279,"categorySlug":280,"categorySlugPath":281,"shortDesc":-1,"coverImageUrl":-1,"slug":282},187904,"MAX8510EXK29+TGC1","Voltage Regulators - Linear","voltage-regulators-linear","integrated-circuits-ics\u002Fpower-management-ics\u002Fvoltage-regulators-linear","analog-devices-max8510exk29-tgc1",{"id":284,"mpn":285,"title":-1,"manufacturer":261,"manufacturerSlug":262,"categoryName":286,"categorySlug":287,"categorySlugPath":288,"shortDesc":-1,"coverImageUrl":-1,"slug":289},11381,"MAX5971AETI+T","Power over Ethernet Controllers","power-over-ethernet-poe-controllers","integrated-circuits-ics\u002Fpower-management-ics\u002Fpower-over-ethernet-poe-controllers","analog-devices-max5971aeti-t",{"id":291,"mpn":292,"title":-1,"manufacturer":233,"manufacturerSlug":234,"categoryName":293,"categorySlug":294,"categorySlugPath":295,"shortDesc":-1,"coverImageUrl":-1,"slug":296},398836,"DLPA3000DPFD","Special Purpose Power Management ICs","special-purpose-power-management-ics","integrated-circuits-ics\u002Fpower-management-ics\u002Fspecial-purpose-power-management-ics","texas-instruments-dlpa3000dpfd",{"id":298,"mpn":299,"title":-1,"manufacturer":261,"manufacturerSlug":262,"categoryName":300,"categorySlug":301,"categorySlugPath":302,"shortDesc":-1,"coverImageUrl":-1,"slug":303},179020,"MAX6320PUK31BX\u002FV+T","Supervisors","supervisors","integrated-circuits-ics\u002Fpower-management-ics\u002Fsupervisors","analog-devices-max6320puk31bx-v-t"]