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- Bel and its groups are primarily engaged in the design, manufacture and sale of products used in networking, telecommunications, high-speed data transmission, commercial aerospace, military, transportation, and consumer electronics. Products include magnetics (discrete components, power transformers and MagJack™ connectors with integrated magnetics), modules (DC-DC converters and AC-DC power supplies, integrated analog front-end modules and custom designs), circuit protection (miniature, micro, surface-mount and PPTC resettable fuses) and interconnect devices (micro, circular and filtered D-Sub connectors, fiber optic connectors, passive jacks, plugs, radio frequency (RF), microwave connectors and high-speed cable assemblies). The company operates facilities around the world. Related product brands include: Bel Fuse, Bel Power Solutions, Cinch Connectivity Solutions, Signal Transformer, Stewart Connector, TRP Connector.

Power Solutions

Bel Power Solutions

Bel has one of the world’s largest power conversion and power management solutions portfolio for AC/DC & DC/DC applications. Learn More

Protection Solutions

Image of Bel's Circuit Protection Family

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

Connectivity Solutions

Bel Connectivity Solutions

Bel’s Connectivity brands offer a diverse line of high quality, high performance connectors, and cable assemblies. Learn More

Product Listing View All

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Featured Products

High Frequency SMA End Launch Connectors

High Frequency SMA End Launch Connectors

Cinch Connectivity Solutions' high frequency end launch connectors are used to transition microwave energy from coaxial to planar transmission line structures. Learn More

Image of Bel Fuse MagJack Integrated Connector Modules

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, ranging from 10/100 BaseT to 10 GBaseT, to PoE(plus). Learn More

Newest Products View All (138)

Image of Cinch Connectivity Solutions Johnson 5G Application Supporting Connectors and Adapters

5G Application Supporting Connectors and Adapters

Cinch Connectivity Johnson’s SMA, SMP, SMPM, 1.85 mm, 2.4 mm, and 2.92 mm series are all designed to meet 5G needs.

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Image of Cinch Connectivity Solutions’ Coax and Triax Adapters

Coax and Triax Adapters

Cinch Connectivity Solutions’ adapters are configurable, compact, and provide high-quality signal integrity when moving from one cable type to another.

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Image of Bel Fuse 0678D Series Fast Blow SMT Fuse

Fast Blow 350 V 3912 SMT Size Fuse – 0678D Series

The fast-acting 0678D series from Bel Fuse has an even higher voltage rating at 350 VAC and ultra-high interrupting ratings (up to 2000 A at 125 VDC).

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Image of Bel Fuse 0678H Series Enhanced Breaking Capability 3912 Sized Fuse

Enhanced Breaking Capability 3912 Sized Fuse – 0678H Series

Bel Fuse's 0678H series, 500 mA through 40 A, offers high-amp circuit protection and a compact surface-mount form factor to save board space.

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Image of Cinch Connectivity Solutions' SMK Series 2.92 mm Connectors

SMK Series 2.92 mm Connectors & Adpaters

Cinch Connectivity Solutions features their SMK series although similar to the SMA interface, a smaller internal body diameter (2.92 mm) and air dielectric provide a higher cutoff frequency.

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Image of Bel's Fiber Optic Patch Cables

High-Speed Single- and Multi-Mode Fiber Optic Patch Cables

Bel's high-speed single- and multi-mode fiber optic patch cables have a tight buffered cable design for high flex environments.

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Tools and Support

Image of Cinch's Type N Connectors

Type N Connectors

Johnson® Type N Connectors meet or exceed the performance requirements of MIL-PRF-39012. All designs are based on 50 ohm system impedance per MIL-STD-348, and operate at frequencies up to 11 GHz minimum. Learn More

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C-RJFTV Series

Bringing the combined technical expertise and engineering capabilities of Cinch’s rugged D38999 shell and Stewart’s high performance RJ45, the RJ45 D38999 provides Ethernet connectivity in harsh environments. Learn More

Image Bel Fuse's Circuit Protection Focus Catalog

Circuit Protection Focus Catalog

Provides overview of Bel Fuse Circuit Protection Portfolio. Learn More

Image of Signal Transformer's Linear Transformers

Linear Transformer At-A-Glance

Provides overview of Signal Linear Transformer Portfolio. Learn More

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Open-Frame Product Selection Guide

An overview of Bel Power Solutions newest Open-Frame power solutions. Learn More

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Product Highlights

A general overview of the intelligent, efficient and reliable power conversion devices provided by Bel Power Solutions. Learn More

Product Training Modules View All (13)


EcoTran Standard Series Transformers

Duration: 10 minutes

This presentation will provide an introduction to Signal's line of EcoTran Standard Series Transformers.

Image of Bel Power Solutions DIN Rail Power Supply

DIN Rail AC-DC and DC-DC Power Supplies

Duration: 10 minutes

DIN Rail power supplies are commonly specified for industry equipment, test and measurement equipment, wireless communications, renewable energy, instrumentation, robotics and automation applications.

Image of Bel Power Melcher AC-DC Power Converters

Railway and Harsh Environment Products

Duration: 10 minutes

MELCHER products are designed to meet the highest national and international standards for harsh environments


High Current Toroidal Inductor Line

Duration: 5 minutes

The presentation highlights the features and benefits of the HCTI series and provides an overview of where and how the parts are used.

Featured Videos View All (17)

Bel Magnetic Solutions Auto Ethernet MagJack | Digi-Key Daily

Bel Magnetic Solutions presents a first of its kind 1GBase-T MagJack ICM designed for next-generation vehicles that utilize Ethernet signaling inside the automobile.

Publish Date: 2018-08-16

Bel Power Solutions Data Center and Open Compute OCP Solutions

Bel Power Solutions offers a full suite of OCP power conversion products that meets the needs of performance, efficiency, and reliability of power systems for data centers.

Publish Date: 2018-06-25

Cinch Fixed Length RF Cable Assemblies | Digi-Key Daily

Cinch Connectivity Solutions is proud to partner with Digi-Key to offer a wide selection of Fixed Length Coax Cable assemblies.

Publish Date: 2018-05-15

Signal Transformer Ecotran Series – Safety Isolation Transformers

The Ecotran series can be used for consumer, automotive, lighting, HVAC and many other applications. Learn about the highly efficient, UL listed series from Signal Transformer, a division of Bel Fuse Corporation.

Publish Date: 2018-05-14

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