Eaton / Cutler-Hammer QBHW2020 Miniature Circuit Breaker

This breaker is designed for use in Eaton Pow-R-Line panelboards. It will also fit older Cutler-Hammer and Westinghouse commercial panelboards that accept Quicklag bolt-on breakers. It is not compatible with standard plug-on residential load centers.

Yes. The QBHW2020 shares the identical physical footprint and bolt-on mounting as the BAB2020. The primary difference is the interrupting capacity. The QBHW series offers a higher 22kAIC rating, whereas the BAB series is rated for 10kAIC. It is a direct, higher-rated replacement.

Yes, all Eaton Quicklag bolt-on miniature circuit breakers between 15 and 100 amps, including the QBHW2020, carry an HACR rating. This makes them safely certified for protecting heating, air conditioning, and refrigeration equipment circuits.

Yes, the QBHW2020 is rated for direct current applications up to 48VDC, where it provides an interrupting capacity of 5kAIC.

The recommended tightening torque depends on the wire size being installed. For 14 to 10 AWG wire, torque to 20 pound-inches. For 8 AWG wire, torque to 25 pound-inches. For 6 to 4 AWG wire, torque to 27 pound-inches.

No. The QBHW2020 features a bolt-on connection designed specifically for commercial and industrial panelboards. Standard residential load centers require plug-on breakers like the Eaton BR or CH series.

The LI designation means the breaker provides Long Time and Instantaneous protection. The Long Time thermal component protects the circuit against sustained overcurrent overloads, while the Instantaneous magnetic component trips the breaker immediately in the event of a severe short circuit.