These 4 pin relays are rated at 12V 40A (NO: 40A),spst heavy duty design relay switch.
Excellent water-repellent and dustproof ability,Antioxidation function, but not using it in water.
Primary leads use 12 a.w.g tinned copper wire,Coil leads use 16 a.w.g tinned copper wire,Black - Ground (85),Yellow - VDC (30), White - Trigger (86), Red - Output N/C (87).
The waterproof relay 12v acts as a bridge between switches and devices, which helps to achieve controlling high rating devices by small rating switches, suitable for auto, car, truck, marine boat, etc.
Be carful when inserting the relay into the socket. If you force it, you will bend the female connectors.