The BK/PCB-3-R is a 3A subminiature radial leaded Fast-acting Fuse is designed to carry rated current for four hours minimum. The PC-Tron series through-hole fuse is UL Recognized for DC supplementary over-current protection to provide individual protection for components or internal circuits in equipment. Suitability for a specific application is dependent on time constants and capacitance values. It is the responsibility of the customer to evaluate the information provided for applicability to their particular application.