The Optifuse TCD-4A is a fuse, time-lag, 4A, 250VAC, ceramic, 5x20mm, brass, bulk manufactured fuse. It is designed to protect circuits from overloads and failures that may otherwise not be detected by traditional current limits. The device features a long typical circuit life with time-lag technology and has a ceramic body with a brass end cap. The fuse is rated up to 4 amps at 250VAC and is 5x20mm in size. It is suitable for industrial, domestic and commercial applications and comes in bulk form.