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This listing includes 1 piece of YC3F series 4-pin power relay, compatible with YC3F-12VDC-1A, YC3F-5VDC-1A and YC3F-12VDC-S-A (T73A series). It supports 5VDC and 12VDC control voltage with a 10A switching capacity, providing stable and reliable circuit control. Widely used in home appliances, timers, small power modules and automation equipment. Its compact structure and standard pin layout make direct replacement simple and convenient.