Vishay 800VDC 50A Bidirectional eFuse Reference Design

Vishay 800V_DC 50A Bidirectional eFuse Reference Design features SiC MOSFETs and a VOA300 optocoupler, handling continuous power up to 40kW. The board operates continuously at full power with <25W of losses and without requiring active cooling. The design includes a preload function, continuous current monitoring, and overcurrent protection with fault shutdown in only 2.5μs. The eFuse construction uses a standard double-sided four-layer PCB (FR4) with 70μm thick copper for each layer. The overall dimensions are 150mm x 90mm, with some connectors extending beyond the edges. The upper part of PCB houses high-voltage circuitry (12 x SCT4020 SiC MOSFETs), while the lower part contains low-voltage control circuitry with connectors, control buttons, status LEDs, and multiple test points. Vishay 800V_DC 50A Bidirectional eFuse Reference Design can be enabled or disabled using the ON / OFF push buttons on the PCB or via an external controller.