Interchangeable/Compatible with: All automobiles and devices equipped with a 12 Volt DC power source. Relay technical specification: Relay load: 40A/12VDC Contact Resistance: ? 100M? Contact Material: Ag Alloy Life Expectancy Electrical: 100,000 Operations (at 30 Operations/min) Life Expectancy Mechanical: 10,000,000 Operations Coil power:1.8W Operate Time: 15ms Release Time: 10ms Initial withstand voltage of Contact and Contact: 1000VAC/1min Initial withstand voltage of Contact and Coil: 1500VAC/1min Insulation Resistance: 100M?/( 500VDC) Temperature Range: -55C ~+70C Humidity Range:35%-80% Atmospheric Pressure:86-106KPa Operation Goal: Create value for our customers is our responsibility, quality products and sincere service is our eternal pursuit. After Sale Service: Customer satisfaction is our greatest pursuit, If you found our products don?t work or not so good quality as you think, Please contact us without hesitation. Feedback and Review warmly welcome: Your Feedback and Review are the motivation for us to provide best product and service, we really appreciate to hear the suggestion from you. Brand new heavy duty SPSTSingle Pole Single Throw relays with colorlabeled wires. Minimum operating voltage 8V, corresponding minimum operating current is 100mA; Standard operating voltage 12V, corresponding standard operating current is 150mA. Small sizeLow power consumptionHigh contact voltage High sensitivity. Contact Material Ag Alloy Contact Resistance 100M. Life Expectancy Electrical 100,000 Operation, Life Expectancy Mechanical 10,000,000 Operation.