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This listing includes 1 piece of HFV4 012-1H2S(555) 4-pin power relay, operating at 12VDC with 40A/50A high load capacity. It is fully interchangeable with HFV4 012-1H2SGR and HFV4-G 012-1H2GR models. Designed for reliable performance in automotive environments, it features strong anti-vibration and stable switching. The standard 4-pin structure allows direct plug-and-play installation, widely used in automotive lighting, motors, fans and other control circuits, making it an ideal part for vehicle maintenance and modification.