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Transparent GE thermal unit CR123H144B 12.5 A

GE

GE CR123H144B Thermal Unit 12.5 A

SKU CH-PX45-SM7H2

Thermal overload unit rated 12.5 A for GE CR123H144 series motor starters

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Full-load protection at 12.5 A rating
  • Transparent housing for quick visual checks
  • Fits CR123H14 series motor starters
  • Cross-references six Grainger part numbers
  • Replaces multiple CR101H and CR101Y variants

What this thermal unit does

The GE CR123H144B thermal unit is an industrial electrical control accessory rated for a full load current of 12.5 A. It is designed for use with compatible motor starters and overload relays in automation panels. Installers select it to match the specific current setting required by their application.

Compatibility and operating context

This unit works with the Series CR123H14 range and matches several Grainger part numbers including 3HYJ6 through 3HYK2. It also fits manufacturer part numbers CR101H, CR101H1, CR101H11, CR101Y, CR101Y1 and CR101Y11. No sale restrictions apply in any state.

Sustained load behaviour

Under continuous full load current the device trips according to its thermal characteristic to protect downstream equipment. It is not intended for applications requiring a different current rating or for use with incompatible starter series. Buyers needing other ampere values must choose a different thermal unit.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 80% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameGE
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

How do I install the GE CR123H144B thermal unit into a CR123H14 series overload relay?

Align the thermal unit with the relay base, press firmly until the latches engage, then verify the 12.5 A rating matches the motor nameplate; the common mistake is seating it loosely, which causes nuisance tripping.

What maintenance or replacement will the GE CR123H144B thermal unit need over time?

The unit is a one-time thermal element; after an overload trip it must be replaced rather than reset, so keep a spare CR123H144B on hand for immediate swap-out.

At what current does the GE CR123H144B thermal unit trip first during sustained overload?

The thermal unit is calibrated for a full-load current of 12.5 A and will open the circuit when the sustained current exceeds that value.

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