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The Square D CC121.0 thermal unit offers reliable protection for motors, controllers, and branch-circuit conductors from overheating due to motor overcurrents. The unit is designed to trip within twenty seconds during overload conditions, preventing damage to electrical components. The product utilizes a one-piece construction with a heater winding that detects excess current. When overloaded, heat melts a special solder, allowing the ratchet wheel to spin and open the control circuit contacts.
This unit is essential for preventing motor burnout and ensuring system integrity in industrial settings.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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