White-Rodgers 120-107112 Coil

The White-Rodgers 120-107112 is a heavy-duty, 14VDC continuous duty solenoid designed for demanding electrical isolation and power contactor applications in RV, automotive, and HVACR systems. This SPNO (Single Pole Normally Open) solenoid features an isolated coil and is rated for a 100 Amp continuous current, with the capability to handle a 400 Amp inrush during initial engagement. Engineered with high-grade silver alloy contacts, it ensures superior conductivity and arc resistance. The 14 Volt DC rating is specifically recommended for battery charging circuits where voltage can exceed standard 12V levels, preventing premature burnout. This Type 120 power contactor utilizes an L-style mounting bracket and 4-terminal configuration (two 5/16-24 studs for contacts and two #10-32 studs for the coil). With a 26 Ohm coil resistance and a temperature operating range from -20°F to 150°F, this unit provides reliable performance for auxiliary battery isolation, motor starting, and heavy-duty load switching.

• High Current Capacity: Rated for 100 Amps of continuous load and up to 400 Amps of surge/inrush current.
• Optimized for Charging Systems: The 14VDC coil design is more robust than standard 12V units, making it perfect for alternators and solar chargers.
• Long-Life Silver Alloy Contacts: Resists pitting and welding under heavy loads for high-cycle reliability.
• Flexible Installation: Can be mounted in horizontal or vertical orientations using the integrated L-bracket.
• Isolated Coil Circuit: 4-terminal design allows for independent control of the coil circuit from the power circuit.

Can I use this 14VDC solenoid in a standard 12V automotive system?
Yes. In fact, most 12V systems operate between 13.5V and 14.5V while charging. A 14VDC rated coil provides better heat dissipation and longevity compared to a standard 12V coil in these continuous-run environments.

What is the difference between an isolated coil and a grounded coil?
This 120-107112 features an isolated coil, meaning both coil terminals (#10-32 studs) must be wired to complete the circuit. Grounded coils ground through the mounting bracket, which can sometimes lead to connectivity issues on painted or corroded surfaces.

What torque should be applied to the terminals?
For the large 5/16" contact terminals, apply 45–55 inch-pounds. For the smaller #10-32 coil terminals, apply 12–18 inch-pounds. Always use a back-up wrench on the bottom nut to prevent internal damage.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.