Bel Fuse is an American public company that designs, manufactures, and markets a broad array of products that power, protect and connect electronic circuits. It offers products in six major categories: Circuit Protection, Power Solutions, Magnetics, Connectivity Solutions, Passive Components and Custom Solutions. Within each category, Bel Fuse offers components such as circuit breakers, thermistors, relays, connectors, connectors and magnetic components. It also provides design, engineering and integration services. Its products are used in a variety of industries including the automotive, aerospace, medical, telecom, industrial and consumer electronic markets. Its products are sold to original equipment manufacturers (OEMs) and contract manufacturers (CMs) in over 55 countries.