Square D CC20.9 Contactor Thermal Unit

Product Description

The SQUARE D CC20.9 is a thermal unit accessory designed for use with compatible contactor assemblies in motor control and load protection applications. Thermal units sense overload conditions by responding to heat generated by excessive current, triggering the overload relay to disconnect the load before damage occurs. The CC20.9 is a field-replaceable component that allows technicians to reconfigure or restore overload protection without replacing the entire contactor assembly. At 0.06 pounds, it is a compact insert that fits directly into the overload relay block. Installation is performed by licensed electricians and industrial maintenance technicians working on motor control centers, panel boards, and related electrical equipment.

The CC20.9 thermal unit is suited for commercial and industrial electrical systems where motor overload protection is required. It is a replacement accessory intended for service scenarios where the existing thermal unit has reached end of life or needs to be resized for a different motor load. Typical applications include HVAC motor starters, pump control panels, compressor contactors, and similar motor-driven equipment in light industrial and commercial settings.

Key Features

• Thermal overload sensing for contactor assemblies
• Field-replaceable design allows reconfiguration without full contactor replacement
• Compact form factor: 3.3 inches long, 2.3 inches wide, 0.8 inches tall
• Lightweight at 0.06 pounds
• Single-unit packaging for direct service replacement

Compatibility

Designed as an OEM-style replacement thermal unit for compatible SQUARE D contactor overload relay assemblies. No specific compatible model numbers were provided in the product data.

Installation Notes

Thermal units are installed by licensed electricians. Always de-energize and lock out the circuit at the panel before servicing contactor assemblies, following NFPA 70E arc flash and lockout/tagout procedures. Verify the replacement thermal unit rating is appropriate for the motor full-load amperage before reinstalling the overload block. Do not energize the contactor until the thermal unit is fully seated and the overload relay cover is secured.