FWX-300A is a Bussmann Series fast-acting semiconductor fuse rated for 300 A and 250 V (AC/DC), part of Eaton’s FWX family designed to protect high‑current power electronics by quickly interrupting fault currents. As a high‑speed fuse for semiconductor protection, it helps guard power supplies, inverters, and other high‑current loads from damage during overcurrent events. This model is commonly chosen for industrial and commercial equipment where reliable rapid protection is required in circuits up to 250 V.
