Eaton Bussmann 170M5143 Fuse

Eaton Bussmann 170M5143 is a high‑speed square‑body fuse engineered for rapid overcurrent protection in medium‑ to high‑voltage power distributions, delivering a nominal 450 A interrupting rating and a maximum operating voltage of 1,250 V. It sits in the Bussmann 170M family, a line of fuses selected for fast arc extinction and predictable clearing behavior in industrial panels, switchgear, feeders, and equipment protection schemes where swift fault isolation limits damage and downtime. End connections are specified as 2/110 AR CU, reflecting copper end caps and the two‑terminal configuration used with compatible square‑body fuse blocks. The 170M5143 designation identifies a precise amperage/voltage rating within Eaton’s Bussmann high‑speed fuse catalog, enabling engineers to match protection to circuits that demand high current and stringent interrupt requirements at up to 1,250 V. In practical terms, this part supports fast fault clearing in applications such as power distribution panels and switchgear, where reliable performance at a 450 A rating and robust voltage handling are essential for safe and continuous operation.