Bel Fuse Inc. | 6,201 followers on LinkedIn. POWER | PROTECT | CONNECT | Founded in 1949, Bel designs, manufactures and markets a broad array of products that Power, Protect and Connect electronic circuits. With over 60 years in the electronics industry, Bel has reliably demonstrated the ability to succeed in a variety of product areas across multiple industries. The company has a strong track record of technical innovation working with the engineering teams of market leaders.