Bussmann SZQ-6C400 Semiconductor Fuse

The Bussmann SZQ-6C400 Semiconductor Fuse is a high-current protection device from the Bussmann Semitron family, designed for power-electronics protection. It is rated at 400 A and 600 VAC, enabling it to interrupt fault currents in medium- to high-power semiconductor circuits while minimizing damage to surrounding components. The SZQ-6C400 model designation identifies this exact device within Bussmann’s semiconductor fuse lineup and it is commonly listed as a 400 A, 600 VAC semiconductor fuse. Used in power conversion equipment, motor drives, and other high-current switching systems, this fuse protects switching devices such as diodes, thyristors, and IGBTs by opening the circuit when overcurrent conditions arise. As part of the Bussmann/Semitron legacy, the SZQ-6C400 aligns with Eaton’s Bussmann portfolio, offering a robust protective solution for critical semiconductor loads where rapid disconnection at fault currents is essential.