Cooper Bussmann FRS300 NSNBC01 Industrial Fuse is a 300-amp, 600-volt fuse in the Bussmann Series designed for heavy-duty protection of industrial power-distribution and control circuits. As part of the FRS-R family, it provides time-delay operation with dual-element, current-limiting technology and an interrupt rating of 200 kA at 600 VAC (20 kA at 300 VDC), making it suitable for protecting motors, transformers, and other high-inrush loads in switchgear and panel assemblies. The NSNBC01 designation identifies this specific listing of the FRS300 device in Cooper Bussmann's catalog, and its use is typical in industrial environments where reliable overcurrent protection is required.
