MODULE: ZT621-12V-A-T   waterproof relay,12V,SPST, 4PINS, with Iron backrest, suitable for automobile used for control, alarms, horn, headlight and more.... Shape Dimensions(mm):42.5*35*45.5 Switching Current: 30A 40A Contact Arrangement:1A 1B 1C 1U Coil Voltage: 6VDC, 12VDC, 24VDC, 48VDC Layout (Bottom view): Electrical Life: 10⁵ ops Wiring Diagram