Keep your automotive electrical systems running smoothly with this pack of five 12V DC 40-amp SPST replacement relays. Designed for easy plug-in installation, each relay is compatible with standard 4-pin relay sockets, making swaps quick and hassle-free. The single-pole single-throw (SPST) contact configuration delivers straightforward on-off control, ideal for starter circuits, lighting, fans, and other automotive applications. Built with copper contacts, these relays offer efficient conductivity and dependable long-term performance. Each unit is rated for 40 amps of continuous current at 12 volts DC, with a coil resistance of 80 ohms and a wattage of 1.8 watts. The compact design measures 2.45 inches in total height, making it a great fit for tight engine bay spaces. With five relays included per pack, you'll have plenty on hand for multiple replacements or ongoing projects. Backed by a one-year warranty for added peace of mind.