Abb CR123C400B Overload Heater Element

Product Description

The ABB CR123C400B is a thermal overload heater element designed to protect motors and electrical equipment from sustained overcurrent conditions. Installed inside a compatible overload relay, the heater element generates heat proportional to current draw. When current exceeds the rated threshold for a set duration, the relay trips and interrupts the circuit, preventing motor winding damage. Electricians and industrial maintenance technicians install these elements during new equipment commissioning or as replacements when an existing heater is damaged or sized incorrectly for the connected load.

Thermal heater elements like the CR123C400B are commonly used in commercial and industrial motor control applications. Typical installation locations include motor control centers, combination starters, and panel-mounted overload relays protecting three-phase or single-phase motors. Proper heater selection is based on the full-load amperage of the motor and the ambient temperature correction factor specified in the relay manufacturer's selection tables.

Key Features

• Thermal overload heater element sized for overcurrent protection of motor loads
• Designed to seat in a compatible ABB overload relay assembly
• Heater rating corresponds to motor full-load amperage selection charts
• Compact form factor suits panel and motor control center installations

Compatibility

Designed as an OEM-style replacement heater element for compatible ABB overload relay assemblies. Consult the ABB heater selection table for the target relay series to confirm the CR123C400B matches the motor full-load amperage and ambient temperature conditions of the application.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements and the equipment manufacturer's instructions. De-energize and lock out the motor control circuit before removing or installing any overload components. Verify the heater element part number against the relay's published selection table before installing, as an incorrectly sized heater will not provide proper motor protection. Do not force the element into the relay housing; it should seat firmly without excessive pressure.

Technical Specifications

• Weight: 0.44 pounds
• Length: 5.25 inches
• Width: 2.25 inches
• Height: 3.25 inches
• UPC: 78316630900

Standard Information

• Brand: ABB
• Manufacturer Part Number: CR123C400B