Bel Fuse

- The Bel Fuse circuit protection portfolio includes one of the broadest ranges of circuit protection products on the market today. Bel Fuse has been at the forefront of the industry shift to board level, surface mount, fuse designs, including our C2Q Chip Fuses with 0603 footprint. Many of today’s smaller hand held devices incorporate this newer technology and Bel Fuse is poised to help!

The circuit protection offering also includes PCB mount 277V radial fuses, as well all standard glass and ceramic cartridge fuses including axial leaded board mounted options. Bel Fuse also offers a complete product offering in PPTC resettable fuses. And, in addition to the standard products, Bel Fuse offers a wide range of value-add options to facilitate more efficient assembly on the production line. Related product brands include: Bel, Bel Power Solutions, Cinch Connectivity Solutions, Signal Transformer, Stewart Connector, TRP Connector.

Circuit Protection Portfolio

Image of Bel Fuse's Circuit Protection Portfolio

The Bel Fuse circuit protection portfolio includes one of the broadest ranges of circuit protection products on the market today. Learn More

LAN Discrete Transformer Modules

Image of Bel Fuse Inc's LAN Discrete Transformer Modules

Bel Fuse, Inc.'s LAN transformer modules are designed for most popular 10/100 Base TX and Gigabit Ethernet transmission data standards over copper LANs. Learn More

MagJack Integrated Connector Modules

Image of Bel Fuse MagJack Integrated Connector Modules

Bel Fuse's MagJack® integrated connector module (ICM) product-line is Bel Fuse and Stewart’s premier family of products for Ethernet networking applications. Learn More

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Featured Products

Image of Bel Fuse Inc's Brick SMT Fuse Portfolio

Brick SMT Fuse Portfolio

Bel Fuse presents surface mount, ceramic tube/end cap fuse constructions, with U.S. (UL/CSA), Europe (VDE/Semko), China (CCC), and Japan (PSE) safety agency approvals. Learn More

Image of Bel Fuse Inc's RJS Series Telecom Power Cross and Ballast Protection

RJS Series Telecom Power Cross and Ballast Protection

The RJS series fuses from Bel Fuse, Inc. are primarily intended for use as a cost effective solution for telecommunication circuit applications that require low-current protection with high-surge tolerance and must comply to test requirements according to UL/IEC1950/60950 and Telcordia GR1089, Issue 3. Learn More

Newest Products View All (44)

SMM Series 3812 Size SMD Fuses Publish Date: 2012-06-29

Square ceramic surface-mountable SMM series of 3812 size medium-blow fuses for overcurrent protection in compact, high-current applications.

Circuit Protection Portfolio Publish Date: 2012-07-23

View Bel Fuse's wide range of circuit protection products including PPTC resettable fuses, PCB mount 277 V radial fuses, and much more.

RJ45 Copper SFP Transceiver Modules Publish Date: 2013-03-12

The RJ45 transceiver modules are designed with Broadcom's BCM54616S chipset and are able to access the physical layer IC via I2C interface.

Brick SMT Fuse Portfolio Publish Date: 2013-03-14

Bel Fuse's brick SMT fuses with ceramic tube/end cap construction are available in case sizes from 2410 to 4717.

SMT Low Profile PTC Resettable Fuses Publish Date: 2013-08-20

The PTC resettable fuses with unique polymer formulation feature a voltage rating range of 6 to 60 VDC.

LAN Discrete Transformer Modules Publish Date: 2013-10-04

LAN discrete transformer modules are designed for 10/100 Base TX and Gigabit Ethernet transission data standards over copper LANs.

Tools and Support

Image Bel Fuse's Circuit Protection Focus Catalog

Circuit Protection Focus Catalog

Provides overview of Bel Fuse Circuit Protection Portfolio. Learn More

Image of Bel Fuse's Fuse Cross Reference

Fuse Cross Reference

Competitive part numbers and Bel Fuse fuse equivalents. Learn More

Image of Bel Fuse's Fuse Terminology

Fuse Terminolgy

Product definition and fuse de-rating guide. Learn More

Image of Bel Fuse's Selection User Guide

Fuse Safety Selection / User Guide

Circuit protection considerations for 3rd party safety certification. Learn More

Image of Bel Fuse's I2T Explanation

I2t Test Methods and Data Presentation

How to properly select a fuse based on I2t values from different fuse manufactures. Learn More

Image of Bel Fuse's PTC Resettable Fuses Cross Reference

PTC Resettable Cross Reference

Competive part number compare and Bel Fuse PTC equivalents. Learn More

Recent PTMs View All (4)

MagJack® Integrated Magnetics Modular Jacks Publish Date: 2011-10-18

The MagJack family of highly integrated Ethernet connector modules offer design flexibility, RoHS compatibility, reliability, and manufacturing testing methods.

Duration: 15 minutes
ARJ45 Category 7a Modular Connector System Publish Date: 2011-10-18

The ARJ45 connector system was designed for high performance Category 7a and Class Fa systems.

Duration: 10 minutes
Modular Jack EPP-918A Environmental Protection Gel Publish Date: 2011-10-18

EPP-918A Compound helps prevent corrosion due to harsh environments and usage, is RoHS6 compliant, and contains a UV tracer to assist in visual inspection.

Duration: 5 minutes
Integrated Connector Module, ICM Publish Date: 2013-07-15

ICM is a single module made of a combination of magnetic and discrete components, which eases the conversion from the physical layer to the physical media.

Duration: 10 minutes

Featured Videos View All (8)

Bel Fuse 0697H Fuses Product Overview | Digi-Key Daily

Bel Fuse's 0697H series of slow blow fuses are rated up to 350 volts AC or 100 volts DC and current surges from 250 mA up to 20 A.

Stewart Connector Specialty Cable Modular Plugs | Digi-Key Daily

Stewart Connector's modular plugs for specialty cable ensure high performance up to 750 operating cycles in temperatures ranging from -40-80 degrees Celsius.

Bel Fuse 0659C and 0659P Time-Lag Fuses | Digi-Key Daily

Bel Fuse's 0659C and 0659P time-lag fuses are high surge, high capacity ceramic fuses ideal for power supply and power adapter applications.

Bel ABC/MBC Low-Profile Series Power Supplies | Digi-Key Daily

Bel Power Solutions offer its ABC and MBC series of low-profile, AC-DC / DC-DC, open-frame power supplies.

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