Bussmann 170M4566 Fuse

The Bussmann 170M4566 fuse is a heavy‑duty high‑speed square‑body fuse rated for 630 A at 690 V, engineered for rapid interruption in high‑current power circuits. This model uses a flush‑end square‑body construction and carries the end‑cap designation 1GKN/50 AR UC, a specification you’ll see on Bussmann/Eaton listings for this style of fuse. As part of the 170M family, it is intended for fast fault clearing in industrial applications such as power distribution panels, switchgear, and motor control centers, where protecting conductors and equipment from overloads is critical. The 170M4566 is specified for 690 V operation, aligning with utility and industrial systems that require robust, fast‑acting protection in challenging electrical environments. With its 630 A rating, it serves as a primary protection device in feeder circuits and large‑current branch circuits, helping ensure system reliability by isolating faults quickly and cleanly. This fuse is designed to fit standard Bussmann 170M square‑body footprints, enabling straightforward replacement in compatible assemblies and panels.