Eaton / Cutler-Hammer BAB2125 Miniature Circuit Breaker

This bolt-on breaker is designed specifically for Eaton Pow-R-Line panelboards, and it is fully compatible with legacy Westinghouse and Cutler-Hammer distribution panels that require BAB frame breakers.

Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Quicklag BAB series to the original specifications. The Eaton BAB2125 is an exact, code-compliant replacement for older Cutler-Hammer and Westinghouse breakers sharing the same catalog number.

The BAB series utilizes the standard Quicklag footprint of 1 inch per pole. As a 2-pole breaker, it requires 2 inches of total width on the panelboard bus.

Yes. In addition to its standard 120/240VAC AC rating, this breaker is rated for DC applications up to 80VDC. It provides a 5kA interrupting capacity at 24VDC, 48VDC, 62.5VDC, and 80VDC.

The integrated box lugs accept 8 to 1 AWG copper wire, and 8 to 1/0 AWG aluminum wire. Always refer to local codes for proper ampacity derating based on your conductor material and temperature ratings.

Both breakers share the same physical dimensions and bolt-on mounting, but they differ in short-circuit interrupting capacity. The BAB2125 provides a 10kAIC rating, while the QBHW2125 is rated for 22kAIC. You cannot substitute the BAB2125 if your application requires the higher fault-current rating.

Bolt-on breakers attach directly to the panelboard bus with screws, creating a rigid mechanical connection. This prevents the breaker from vibrating loose over time in heavy commercial and industrial environments, ensuring consistent electrical continuity.

No. The breaker features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. The overload and short-circuit trip thresholds are factory-calibrated and cannot be modified in the field.