White-Rodgers 70-111224 Coil

The White-Rodgers 70-111224 is a professional-grade 12VDC continuous duty solenoid designed for high-amperage power switching in rigorous HVACR and industrial environments. This SPNO (Single Pole Normally Open) contactor features an isolated coil with an 16-ohm resistance, engineered specifically to prevent ground loops and ensure reliable operation in complex electrical circuits. With a 80 amp continuous rating and the ability to handle inrush currents up to 400 amps, this DC power contactor is a staple for technicians servicing hydraulic power units, winch systems, and specialized heating applications. The dust-resistant steel encasement provides superior protection against environmental contaminants while facilitating a lower heat rise during extended duty cycles. For secure field integration, the unit utilizes 5/16"-24 UNF-2A threaded studs for the main contacts and #10-32 UNF-2A studs for the coil terminals. This industrial solenoid coil delivers the mechanical durability and electrical precision required for critical system automation and high-current capacity control.

• Continuous Duty Engineering: Optimized for systems requiring constant power without the risk of premature coil burnout common in intermittent models.
• Isolated Ground Circuitry: The isolated coil design prevents electrical interference and simplifies wiring in systems with unique grounding requirements.
• High Inrush Capacity: Capable of managing a 400A surge, making it ideal for inductive loads and heavy-duty motor starts.
• Rugged Enclosure: The dust-resistant case and steel construction ensure longevity in harsh mechanical rooms or exposed industrial sites.
• Standardized Mounting: Features a universal bracket configuration for vertical mounting, facilitating straightforward replacement of legacy Stancor and White-Rodgers parts.

Can this solenoid be used in 24V systems?
No, this specific model is rated for a 12V DC control voltage. Applying 24V will result in immediate coil failure. For 24V applications, technicians should source the 70-903 or equivalent 24VDC isolated coil models.

What is the difference between an isolated and a grounded coil?
The 70-111224 features an isolated coil, meaning both coil terminals are independent of the metal frame. This allows for more flexible switching configurations compared to grounded models where one side of the coil is internally bonded to the mounting bracket.

Is surface heat normal during operation?
Yes, because this is a continuous duty solenoid, the coil generates heat while energized. The steel encasement is designed to dissipate this thermal energy. However, ensuring it is mounted in a ventilated area per specifications will maximize its service life.

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.