Resettable 100 A, 48 V eFuse

With the steady increase in 48V eMobility applications, semiconductor-based resettable fuses are quickly replacing mechanical relays and contactors, as well as traditional non-resettable fuses. The eFuse concept is an innovative new trend for protecting both the user and the hardware in high-power applications. In a new reference design by Vishay, an eFuse featuring TrenchFET® MOSFETs was designed to handle continuous current up to 100A. It has been designed to operate continuously at max. current with less than 14W of losses, without requiring active cooling.

The design features a pre-charge function, continuous current monitoring, and overcurrent protection. The overcurrent protection can stop current flow through the eFuse in under 2μs. Typical applications are battery management systems, EV test environments, solar installations, industry and home automation, industrial and server computing, networking, telecom, and base station power supplies.