Eaton / Cutler-Hammer BWH2125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer BWH2125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for residential and commercial service entrances, the BWH2125 is a 125A, 2-pole main circuit breaker. It provides essential thermal-magnetic protection for main disconnects. This bolt-on breaker installs into Eaton Type BR load centers, ECB enclosures, and meter stacks. It accepts 2 AWG to 300 kcmil wire and serves as a replacement for older panels, though superseded by the CSR2125N. Featuring a 25kAIC rating at 120/240V, it ensures robust fault clearing and is HACR rated.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | BWH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 120/240VAC |
| Frame Type | BWH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Type BR Load Centers, ECB Unit Enclosures, Meter Stacks, Meter Breakers |
| Wire Gauge | 2 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 2 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Bell Alarm |
|---|---|
| Accessories | Lugs Included |
| Standards | Federal Specification W-C375, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker, HACR Rated, High Interrupting Capacity |
Product FAQs
5 answersWhat is the difference between the Eaton BW2125 and BWH2125?
The primary difference is the short-circuit interrupting capacity. The standard BW2125 has a 10kAIC rating, whereas the BWH2125 features a higher 25kAIC rating at 120/240VAC. Both breakers share the exact same physical footprint and mounting style.
Are the BWH2125 and CSR2125 interchangeable?
Yes, the BWH2125 and CSR2125 are physically and electrically identical. The BW and BWH series originated under the Westinghouse brand, while the CSR series was Cutler-Hammer. They can be used interchangeably as a main breaker replacement, provided both types are listed on your panel's specification label.
Can the BWH2125 be used as a branch breaker in a standard load center?
No, the BWH2125 is specifically designed as a bolt-on main breaker. It is intended for use in Eaton Type BR main breaker load centers, ECB unit enclosures, and meter stacks, rather than as a standard plug-on branch breaker.
Do I need a hold-down kit to install the BWH2125?
No. Because the BWH2125 is a bolt-on main breaker that fastens directly to the panel's bus assembly, it does not require a separate hold-down screw kit. Hold-down kits are typically only required for plug-on breakers used in back-fed main applications.
Are the trip settings on the BWH2125 adjustable?
No, the BWH2125 features a fixed thermal-magnetic trip unit. The long-time and instantaneous trip functions are factory-set and cannot be adjusted in the field.
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