12V 40A 4-Pin Relay for Tractor Electrical Systems SKU: QT4681

A failed relay means dead hydraulics when you're moving hay, no starter response at 5 AM feeding time, or work lights that quit during harvest. This 40-amp normally open relay restores reliable electrical control to your equipment's high-current circuits when standard relays can't handle the load.

Why This Relay Delivers

• 40-amp switching capacity handles starter motors and hydraulic pumps without overheating
• Normally open 4-pin design provides safe, predictable circuit control
• Agricultural-grade construction resists vibration, moisture, and temperature extremes
• Heavy-duty contacts engineered for repeated high-current switching cycles

With over 55 years of electrical troubleshooting experience, S&H Parts knows the difference between a relay that works and one that works reliably. Call us if you need help confirming the right fit for your specific application.