Cooper Bussmann 63ET-63A-660VAC Semiconductor Fuse

Cooper Bussmann 63ET-63A-660VAC Semiconductor Fuse is a high‑speed British standard fuse designed to protect semiconductor circuitry in power electronics. The single‑barrel fuse in the 63ET family is rated for 63 A and supports up to 690 VAC (IEC) and 700 VAC (UL), with a breaking capacity of 200 kA RMS symmetrical, enabling fast interruption during overcurrent events. It is intended for semiconductor protection in applications such as rectifiers, DC buses, DC drives, and power converters, helping safeguard power supplies and inverter stages in industrial equipment. With its 63 A rating, this model fits medium‑to‑high current protection needs where rapid fault isolation is critical, while complying with British standard protection practices. The 63ET series is known for its fast‑acting performance in semiconductor protection duties, making the 63ET‑63A‑660VAC variant a robust choice for protecting critical power electronic components and ensuring reliable system uptime.