Eaton / Cutler-Hammer BRH2125 Miniature Circuit Breaker

The BRH2125 is designed for use in Eaton Type BR load centers. It is also backward compatible with legacy Cutler-Hammer, Bryant, and Westinghouse load centers that accept 1-inch Type BR plug-on breakers.

Yes, this breaker is commonly used as a plug-on tenant main circuit breaker in Eaton 1MP, 1MM, and 3MM 125A modular metering stacks.

Yes, the box lugs on the BRH2125 are rated for both copper (Cu) and aluminum (Al) conductors ranging from 4 AWG to 2/0 AWG. Always apply an approved oxide inhibitor when terminating aluminum wire.

As a 2-pole breaker with a 1-inch per pole width, the BRH2125 requires two standard 1-inch spaces, totaling 2 inches of space in a compatible Type BR load center.

The 22kAIC rating means this breaker can safely interrupt up to 22,000 amps of fault current. This high-interrupting capacity is often required in commercial applications or residential systems located close to a utility transformer where the available fault current exceeds the standard 10kAIC.

The primary difference is the interrupting capacity. The standard BR2125 has a 10kAIC rating, while the BRH2125 is a high-interrupting breaker rated at 22kAIC. Both share the same physical dimensions and fit the same Type BR load centers.

Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Type BR product line under the Eaton brand. A new Eaton BRH2125 is the exact direct replacement for an older Cutler-Hammer, Bryant, or Westinghouse breaker with the same catalog number.

The thermal component provides a delayed trip to protect the circuit against sustained overloads, while the magnetic component provides an instantaneous trip to protect against severe short circuits.