Ross Hill 1304-2045-00 Overload Heater, CR123C303B

Ross Hill 1304-2045-00 identifies the GE/ABB CR123C303B overload heater used in NEMA Size 2 motor-control applications. ABB publishes CR123C303B in its Size 2 heater tables and requires three heaters for a three-phase starter. The code must be selected from the correct table using motor full-load current and the documented application conditions.

Independent supplier. Edmundson Industrial is not appointed, endorsed, or sponsored by Ross Hill, NOV, GE, ABB, Mersen, or any other manufacturer named on this page. Names and part numbers appear for identification only. Availability, condition, price, and lead time are confirmed for each request.

Part-number identification

Use CR123C303B as the ordering identity and use the motor application to verify selection. A legacy ampere phrase, a starter frame, or a single installed heater does not replace the complete three-phase selection check.

The complete installed label remains the ordering reference. Match the part number, electrical ratings, physical interface, and circuit duty before approving a replacement.

Select from motor full-load current

Begin with the motor nameplate full-load current. Apply the service-factor instruction and the correct ABB table for the starter and application. Do not use breaker handle amperes, starter continuous amperes, or measured running current as a substitute for the documented heater-selection procedure.

Why one ampere phrase does not define CR123C303B

ABB heater tables organize the same heater code by application and table column. The resulting motor-current values are selection limits, not a simple resistance label or fixed breaker-style trip rating. Quoting the exact CR123C303B code keeps the request precise while the motor data confirms whether that code belongs in the starter.

Replace a coordinated set

Three-phase protection depends on all three heater positions. Verify that the installed markings match, inspect each clip and terminal for heat damage, and keep the replacement set consistent. Correct the reason for overheating before returning the starter to service.

Keep the relay and reset in the review

CR123C303B works through the CR324D310FX overload relay in the Size 2 starter context. Confirm the relay condition, reset travel, ambient adjustment, terminal pressure, and upstream protection along with the heaters.

Also searched as

1304-2045-00 · 1304204500 · CR123C303B · GE Size 2 overload heater · ABB CR123C303B · Size 2 motor heater element

What to send with your request

Send the exact heater code with the motor and starter data used to verify it.

• Complete RHCC and CR123 heater numbers
• Photographs of all three heaters, clips, terminals, relay, and starter label
• Motor voltage, phase, horsepower, full-load current, and service factor
• Starter and overload-relay catalog numbers
• Enclosure, ambient, duty, reset arrangement, and upstream protection
• Quantity required, acceptable condition, and need-by date

A purchase order is not required for an identification review. Send the complete numbers and clear equipment photographs so the quoted item can be checked against the application.

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