SR-5-4A-AP is a subminiature radial leaded time-delay fuse designed for primary and secondary overcurrent protection in electronic circuits. This fuse is rated at 4A with a 250V voltage rating and features an interrupting rating of 40 amps at rated voltage, providing reliable protection against overcurrent conditions. The device exhibits a typical DC cold resistance of 0.012 O and a voltage drop of 62 mV at 20°C rated current, with a typical melting characteristic of 80 O·m. Designed to IEC 60127-3 Sheet 4 standards, it offers high inrush withstand capability and is compatible with both leaded and lead-free reflow and wave solder processes. The fuse operates over a temperature range of -40°C to +85°C and can be placed directly into PCB or plugged into BK/PCS holders, making it suitable for diverse applications requiring compact, reliable overcurrent protection.