Littelfuse
Littelfuse is the global leader in circuit protection, offering the broadest portfolio of fuses, TVS diodes, varistors, gas discharge tubes, and polymer PTC devices in the industry. Beyond protection, Littelfuse manufactures power semiconductors (thyristors, IGBTs, MOSFETs), sensor switches, and relay products for automotive, industrial, telecom, and consumer electronics applications where system uptime and safety are non-negotiable.
- Request available source and traceability documents
- Submit global sourcing requests
- Request pricing by quantity
- Check stock and lead time through RFQ
About Littelfuse
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse has spent nearly a century protecting electronic circuits from overcurrent, overvoltage, and electrostatic discharge threats. Through acquisitions of IXYS (power semiconductors), Cole Hersee (vehicle switches), and Hamlin (reed sensors), Littelfuse has expanded well beyond fuses into a comprehensive electronics protection, power control, and sensing company.
Littelfuse's protection portfolio is the industry benchmark: Nano2 and PICO II subminiature fuses for space-constrained designs, SIDACtor and Battrax devices for telecom surge protection, AEC-Q101-qualified TVS diodes for automotive bus protection, and SRP series metal oxide varistors for AC line clamping. The IXYS power semiconductor line adds high-voltage IGBTs, thyristors (SCRs), and power MOSFETs for industrial motor drives, welding, and renewable energy inverters.
On Octatronics, search Littelfuse products by protection type, voltage rating, response time, and package. Filter by automotive AEC-Q qualification, compare tripping characteristics, and request RFQs for both standard and custom protection solutions.
Littelfuse Product Areas
- Fuses — blade, cartridge, SMD, and resettable PPTC
- TVS & varistors — ESD, automotive, and telecom surge protection
- Power semiconductors — IGBTs, thyristors, triacs, and MOSFETs
- Sensors & switches — reed, Hall-effect, and heavy-duty vehicle switches
Littelfuse Product Lines
Explore Littelfuse's extensive product portfolio by major product area.
Embedded Processing
MCUs, MPUs and SoCs provide embedded control and computing. Compare core architecture, memory, peripherals, operating range and package.
Circuit Protection
Protection devices limit damage from overcurrent, overvoltage and electrostatic discharge. Check working voltage, clamp voltage, pulse rating, response, reset behavior and package.
Discrete Semiconductors
Diodes, transistors, MOSFETs and IGBTs switch, rectify or protect signals and power. Compare voltage and current ratings, conduction loss, switching behavior, thermal resistance and package.
Products
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