RC-400112-RN, Heavy Duty Cole Hersee Automotive Relay; 40A at 12V DC; Form C: SPDT with resistor suppressor; Snap-in bracket supplied. Ignition protected to SAE J1171, Section 5. Cole Hersee Relays are rated based on a steady state resistive load. De-rate according to the type of load: Motor load: inrush can be 5 to 10 x steady state current. Solenoid load: Inrush can be 10 to 20 x steady state current. Incandescent lamp load: Inrush can be 10 to 15 x steady state current.