Bel Fuse 555008 is a round two-piece mini fuse. It is a 400mA fuse with a 5mm x 20mm size that provides overload protection for electronic circuits. The fuse has a white body with a transparent lid to allow for easy visual inspection. The Bel Fuse 555008 has a quick-acting, time-delay characteristic and is UL/CSA-approved. It is commonly used in consumer products such as computers, appliances, and audio/visual equipment.