Circuit Protection
Circuit protection devices safeguard electronic systems against overcurrent, overvoltage, electrostatic discharge (ESD), and transient voltage spikes that can damage sensitive ICs and cause system failures. Octatronics catalogs fuses, TVS diodes, varistors, gas discharge tubes (GDTs), PTC resettable fuses, and ESD suppressors from Littelfuse, Bourns, Vishay, Nexperia, and onsemi.
Explore Circuit Protection Subcategories
Product Series & Base Models
Navigate by model series to compare ordering variants and technical specifications within the Circuit Protection family.
Browse Circuit Protection Products
| PART NUMBER | MANUFACTURER | DESCRIPTION | STOCK | QTY / ACTION |
|---|---|---|---|---|
| SM4T50AY | STMicroelectronics | Automotive 400 W TVS in SMA | 50 | |
| SM4T47CAY | STMicroelectronics | 400W Bidirectional TVS Diode, 49V Breakdown, SMA, Surface Mount | 4,835 | |
| SM4T47AY | STMicroelectronics | 400W Unidirectional TVS Diode, 40V, SMA, 150°C | 3,789 | |
| SM4T39CAY | STMicroelectronics | 400W Bidirectional TVS Diode, 33V, SMA, 33A Peak Pulse Current | 10,000 | |
| SM4T39AY | STMicroelectronics | 400W Unidirectional TVS Diode, 33V, SMA, ZENER | 18 | |
| SM4T35CAY | STMicroelectronics | 400W Bidirectional TVS Diode, 30V, SMA, 48.4V Clamp | 175 | |
| SM4T35AY | STMicroelectronics | Automotive 400 W TVS in SMA | 20,000 | |
| SM4T33CAY | STMicroelectronics | Bidirectional TVS Diode, 400W, 31.1-34.3V, SMA | 4,699 | |
| SM4T33AY | STMicroelectronics | 400W Unidirectional TVS Diode, 28V, SMA, 45.4V Clamp | 3,001 | |
| SM4T30CAY | STMicroelectronics | 400W Bidirectional TVS Diode, 26V, SMA, 43A Peak Pulse Current | 3,655 |
Top Circuit Protection Manufacturers
onsemi
onsemi Circuit Protection products are available for part-number review, stock checks, and RFQ support.
28,226 productsROHM
ROHM Circuit Protection products are available for part-number review, stock checks, and RFQ support.
3,980 products
TE Connectivity
TE Connectivity Circuit Protection products are available for part-number review, stock checks, and RFQ support.
6,241 productsVishay
Vishay Circuit Protection products are available for part-number review, stock checks, and RFQ support.
9,347 products
Nexperia
Nexperia Circuit Protection products are available for part-number review, stock checks, and RFQ support.
3,317 productsPanjit
Panjit Circuit Protection products are available for part-number review, stock checks, and RFQ support.
687 products
Infineon Technologies
Infineon Technologies Circuit Protection products are available for part-number review, stock checks, and RFQ support.
20,310 productsNXP Semiconductors
NXP Semiconductors Circuit Protection products are available for part-number review, stock checks, and RFQ support.
20,288 products
Microchip Technology
Microchip Technology Circuit Protection products are available for part-number review, stock checks, and RFQ support.
67,462 products
Texas Instruments
Texas Instruments Circuit Protection products are available for part-number review, stock checks, and RFQ support.
84,045 productsAbout Circuit Protection
Circuit protection is a non-negotiable requirement in every electronic design — from consumer USB ports vulnerable to ESD events to industrial motor drives exposed to lightning-induced surges. Protection devices are selected based on standoff voltage, clamping voltage, response time, peak pulse current, and repetitive surge capability.
This category includes TVS (Transient Voltage Suppressor) diodes for ESD and surge clamping, MOVs (Metal Oxide Varistors) for AC line protection, GDTs (Gas Discharge Tubes) for telecom surge protection, fuses (blade, cartridge, SMD, and resettable PPTC), and integrated ESD protection arrays for high-speed data interfaces (USB, HDMI, Ethernet).
On Octatronics, search protection devices by type, voltage rating, response time, and package. Compare protection levels across manufacturers and submit RFQs for AEC-Q qualified and commercial-grade components.
Related Applications
Discover industry applications that commonly use Circuit Protection components.
Data Center
Power, conversion, protection, and interconnect components for AI servers and rack systems.
AI Server Power
Power path from rack bus to GPU, CPU, and AI ASIC boards.
Automotive Lighting
LED drivers and lighting-control devices.
Automotive Power Management
Module power and load-control devices.
Battery Management Systems
Cell monitoring, pack protection, and isolated communication for automotive and energy BMS.
Energy Storage
Conversion and protection devices for battery energy storage systems.
LED & Lighting
LED drivers and lighting power devices.
Smart Appliances
Motor, sensing, and connectivity devices.
UV & Specialty Lighting
UV and specialty LED driver devices.
Vehicle Networking
CAN, LIN, and automotive Ethernet transceivers and PHYs.
Frequently Asked Questions
Octatronics can help source a wide range of Circuit Protection from major manufacturers worldwide, including active production parts, long-lead-time items, and hard-to-find components.
Yes. You can submit a single part number or upload a BOM with multiple parts. Our team will check stock, date code, lead time, and pricing for each item.
Availability depends on the specific part number and supplier source. For important orders, buyers can request packaging photos, labels, date code information, and traceability documents.
Yes. Octatronics supports sourcing for active, end-of-life, obsolete, and hard-to-find components through our global supplier network.
Please provide the part number, manufacturer, quantity, required date code, target price, delivery country, and whether original packaging or COC is required.