The DF Electric 373445 with Fuse is a glass passivated, ceramic, silver-plated, single-pole voltage fuse rated for use in up to 1 kVDC circuits at 315A. It features a fast-acting NH3 cylinder design for enhanced safety. It is designed for use in power supplies, lighting, motor-switching, and other general protection applications. It is ideal for use in harsh environments, since it is highly resistant to moisture, dust, temperature, shocks, and vibrations.