Bel Fuse Inc., founded in 1949 and headquartered in Jersey City, is a global electronics manufacturer specializing in products for networking, telecommunications, high-speed data transmission, aerospace, military, broadcasting, transportation, and consumer electronics industries. The company's product portfolio includes magnetic components, power solutions, protection products, and connectivity solutions such as fiber optic connectors, cable assemblies, RF connectors, and RJ connectors.

Bel Fuse markets its diverse range of electronic components under multiple brand names including Bel, TRP Connector, MagJack, Signal, Bel Power Solutions, Power-One, Melcher, Stratos, Fibreco, Cinch, Johnson, Trompeter, Midwest Microwave, Semflex, and Stewart Connector. With operations across North America, Europe, and Asia, the company serves both B2B and B2C markets through a combination of direct sales management and authorized distribution channels.