Eaton / Challenger CLB2125 Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Quantity
Eaton / Challenger CLB2125 - 125A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
Description
Designed to safely update older electrical systems, this 125A two-pole classified component provides essential thermal-magnetic overcurrent protection. The plug-on design installs into Challenger Type C, Westinghouse, and Eaton BR load centers. It acts as an exact physical and electrical substitute for the original, crossing over to the BR2125. Rated for 10kAIC at 120/240VAC, the HACR-rated unit accommodates #4 to 2/0 AWG wire and features a common trip mechanism for safety.Specifications
| Brand | Eaton / Challenger |
|---|---|
| Part Number | CLB2125-R |
| Series | CLB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | CLB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Challenger Type C Load Centers, Eaton Type BR Load Centers, Westinghouse Type BR Load Centers |
| Wire Gauge | #4-2/0 AWG |
| 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 | Shunt Trip, Auxiliary Switch, Padlock Attachment |
|---|---|
| Standards | UL 489 |
| Approval | HACR, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
5 answersWhich load centers are approved to accept the CLB2125 circuit breaker?
This plug-in breaker is designed for legacy Challenger Type C load centers. It is also physically and electrically compatible with Eaton Type BR and Westinghouse Type BR panels.
What wire sizes are compatible with the lugs on the CLB2125?
The line and load side box lugs are designed to accept field wiring ranging from #4 to 2/0 AWG.
What are the modern cross-reference options for a legacy Challenger CLB2125?
Because Eaton acquired the Challenger distribution line, the modern Eaton BR2125 and C2125 serve as direct, UL-listed replacements for this 125A, 2-pole breaker.
What trip functions are included in the CLB2125 thermal-magnetic breaker?
The breaker utilizes a fixed thermal-magnetic trip unit equipped with Long-Time and Instantaneous (LI) functions to provide standard overload and short-circuit protection.
Why might the CLB2125 be branded as either Sylvania or Challenger?
This breaker may carry Sylvania or Challenger branding because both names were used interchangeably for this product line prior to Eaton acquiring the brand. Both variations represent the same CLB frame and specifications.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.