MODULE: ZT621-12V-C-T mini relay,waterproof,12V,SPDT, 5PINS, 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 Coil Voltage: 6VDC, 12VDC, 24VDC, 48VDC Layout (Bottom view):  Electrical Life: 10⁵ ops Wiring Diagram