12V Relay Switch KNACRO 30A High Current 12V Contactor Relay Switch Power Switch DC High Current Relay Input: 12V DC (relay powered) Yeeco® 30A High Current 12V Contactor Relay Switch Power Switch DC Power Switching Control Board Control Module Electrical Relay Switches for Cooler Heater Refit Water Heater Control Control voltage: 250V Max Input: 12V DC (relay powered 30A High Current 12V Contactor relay Switch DC power Switching Control Board electrical relay switches Input: DC 12V (relay powered) Output: 30A single channel relay of 4 terminal shunt Control current :max 30A Maximum control voltage:250V coil current:60MA packing including: 1x 12V relay Switch Switching relay Heating & Cooling at 30A single channel relay of 4 terminal shunt