The OptiFuse 5mm x 20mm 3A 250V Time Lag Glass Fuse comes in a 5-pack designed for dependable circuit protection. These UL Listed slow-blow fuses feature a glass body, making it easy to inspect the filament visually. Their time lag design accommodates brief high inrush currents, typical in alternator applications, reducing nuisance trips. Rated for 250VAC and 3A with a 200A interrupt rating, these fuses open only when sustained overcurrent occurs, safeguarding your electronics effectively.