The Bussmann FWX-100A is a fast-acting, 100 A semiconductor fuse from Eaton’s Bussmann FWX Series, rated for 250 V and designed to protect high‑speed power‑electronic circuits. Its 31 mm by 40.4 mm (1.22 in x 1.59 in) body provides a compact, standard FWX footprint suitable for inline protection in many power‑supply assemblies. It carries a 100 A rating and a 250 V rating for AC or DC operation, reflecting its use in fast‑clearing protection of semiconductor devices. FWX is described as a high‑speed, fast‑acting family of fuses intended for semiconductor protection, making the FWX‑100A a practical choice for switching regulators, inverters, and other electronic power stages.
