Eaton / Challenger C2125 Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Quantity
Eaton / Challenger C2125 - 125A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Supplying robust 125A capacity, this two-pole thermal-magnetic component protects 120/240V residential distribution systems. The unit is ideal for feeding subpanels or managing high-draw electrical equipment safely. Designed to maintain vintage infrastructure, it installs into Challenger Type C, Westinghouse, and Eaton BR load centers. For those requiring a contemporary cross-reference, the BR2125 serves as an exact replacement.Specifications
| Brand | Eaton / Challenger |
|---|---|
| Part Number | C2125 |
| Series | C |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Challenger Type C Load Centers, Eaton Type BR Load Centers, Westinghouse Type BR Load Centers |
| Wire Gauge | 4 AWG - 2/0 AWG (Cu/Al) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | UL 489 |
| Approval | HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
5 answersWhat is the modern replacement for the Challenger C2125 circuit breaker?
The Eaton BR2125 is the direct, modern cross-reference and exact replacement for the Challenger C2125. Eaton acquired the Challenger line and continues to manufacture these breakers under the BR series.
Can I install the Challenger C2125 in an Eaton BR load center?
Yes. The C2125 is fully compatible for use in Eaton Type BR load centers, as well as legacy Challenger Type C and Westinghouse Type BR panels.
Is the Challenger C2125 HACR rated?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific safety designation.
What hold-down kit is required when back-feeding the C2125 as a main breaker?
When used as a back-fed main disconnect, the NEC requires a mechanical fastener to secure the plug-on breaker. For compatible Eaton BR load centers, use the BREQS125 hold-down screw kit designed for breakers up to 125A.
Can I use aluminum wire with the C2125 breaker?
Yes, the box lugs on this breaker are rated for both copper (Cu) and aluminum (Al) conductors ranging from 4 AWG to 2/0 AWG. Always apply a suitable oxide inhibitor when terminating aluminum wiring to prevent corrosion and ensure a secure connection.
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