12V 40A Normally Open Relay for Tractor Electrical Systems SKU: QT4556

When relays fail, your critical systems fail—cooling fans stop when you need them most, hydraulic pumps quit mid-task, and work lights go dark during extended hours. This 40-amp normally open relay restores reliable switching control for high-current electrical loads in your tractor and farm equipment.

Why This Relay Delivers

• 40-amp capacity handles demanding electrical loads without overheating
• Silver-alloy contacts resist arcing damage for extended electrical life
• 4-pin design fits standard relay sockets for quick replacement
• Built to withstand vibration, moisture, and temperature extremes

S&H Parts has been solving electrical problems on farms for over 55 years. If you need help confirming fitment for your specific application, give us a call.