General purpose relays fit many vehicles. Typical applications include: lighting starting horn heating and cooling. Voltage: 12, 24 Vdc. Amps: 12 Vdc. 24 Vdc: NO 40 A, NC 30 A, NO 20 A, NC 15 A. Circuitry: Form A (SPST), Form C (SPDT), Form 2A (SPST 2 Terminals). Contacts: Normally Open (NO), Normally Closed (NC). Contact Material: Silver alloy. Terminals: Blade.