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This 2-piece JY series power relay set includes JY5H-K (5VDC), JY12H-K (12VDC), and JY24H-K (24VDC) models. With 5A 250VAC SPST 4-pin configuration, it delivers stable switching, low power consumption, and strong anti-interference capability. Ideal for industrial control, smart home appliances, automotive electronics, and security equipment. Fully compatible with original Fujitsu Takamisawa JY series relays, plug-and-play for easy maintenance and replacement.