The OptiFuse 5mm x 20mm 500mA 250V time lag glass fuse (5 pack) is designed for dependable circuit protection. Featuring a glass body and a time lag characteristic, it safely handles brief inrush currents, minimizing nuisance trips. UL Listed and RoHS/REACH compliant, this fuse measures 5mm by 20mm and supports 250V with a 500mA rating. Its clear casing allows easy filament inspection, and the 200A interrupt rating ensures robust performance. Ideal for applications like alternators, this pack of five offers reliable, expert-level protection for your electronics.