Square D CC39.6 Contactor Thermal Unit C Series

Product Description

The SQUARE D CC39.6 is a replacement thermal unit designed for use with C Series contactors. Thermal units provide overload protection by detecting heat generated from excess current flow through the contactor, tripping the overload relay to protect motors and connected loads from damage. This accessory mounts directly into compatible overload relay blocks and is sized to match specific full-load ampere ratings for the application. Licensed electricians and motor control technicians install this unit as part of motor starter maintenance and overload relay servicing in industrial and commercial control panels.

The CC39.6 thermal unit is intended for use with C Series contactors and overload relay assemblies. It is a direct replacement component suited for motor control center (MCC) applications, machine tool control panels, pump motor starters, and similar industrial motor control installations where thermal overload protection is required. Verify the current rating of the existing thermal unit before replacement to ensure proper overload protection for the connected motor load.

Key Features

• Thermal overload detection protects motors from sustained overcurrent conditions
• Designed as an OEM-style replacement for C Series contactor overload relay assemblies
• Compact form factor fits directly into compatible overload relay blocks without modification
• Lightweight construction at 0.06 pounds for easy handling during panel service
• Sold individually, allowing single-unit replacement as needed

Compatibility

Designed for use with SQUARE D C Series contactors and their associated overload relay assemblies.

Installation Notes

Installation should be performed by a qualified electrician following applicable NEC requirements. De-energize and lock out the panel or motor control center before removing or installing thermal units. Match the replacement thermal unit rating to the motor full-load ampere rating per the overload relay selection chart. Do not substitute thermal units of different ratings, as improper selection will defeat overload protection.