Ferraz Shawmut A25X400-4 is a 400 A, 250 V Amp-Trap Form 101 semiconductor fuse designed for fast-acting protection of power semiconductors. This blade-bolt-in fuse variant (Form 101) is UL Recognized and rated for 250 VAC with an interrupting rating of 10.6 kA, and has an overall length of about 3.844 inches. It protects power semiconductors such as diodes and SCRs in high-current equipment like motor drives, inverters, and rectifier assemblies. Common termination variants include A25X400-4TA and A25X400-4TI, reflecting the blade/bolt-in form factor used in industrial electrical installations.
