The EF2-4.5NUH-L is a non-latching, miniature signal relay from the EF2 series, designed for space-constrained applications. It operates with a nominal coil voltage of 4.5 VDC and features low power consumption of 50 mW and a coil resistance of 405 Ω. This relay provides a 2 Form C contact arrangement capable of switching up to 1A at a maximum of 220 VDC or 250 VAC. Due to its compact size, low power needs, and high surge capacity, it is ideal for electronic switching systems, PBX, terminal equipment, and telephone systems.