The Eaton Bussmann 170M2621 is a high-speed square body industrial fuse designed for high-performance electrical protection. This fuse has a rating of 400A and 690V, with aR class and 00/80 speed characteristics. With its sturdy square body design, this industrial fuse is reliable and efficient for a wide range of industrial applications. Trust Eaton Electrical to deliver reliable and high-quality electrical components for your industrial needs.