Part of the Quicklag family, the Eaton BAB2040 is a robust 40-amp, two-pole miniature circuit breaker designed for reliable electrical distribution in residential, commercial, and industrial settings. It offers standard thermal-magnetic protection and features a bolt-on mounting style for seamless installation into Eaton Pow-R-Line, Westinghouse, and Bryant panelboards. This breaker also ensures backward compatibility as a replacement for legacy QNBL and QBHW2040 breakers..The Eaton / Cutler-Hammer BAB2040 is a 2-pole, 40A miniature circuit breaker with a 10kA interrupt rating at 120/240VAC. It utilizes thermal-magnetic trip technology with fixed thermal and magnetic trip functions (LI). This bolt-on unit is compatible with 14-4 AWG aluminum or copper wire and is suitable for use with Eaton Pow-R-Line, Westinghouse, and Bryant panelboards. It operates at 120/240VAC and also supports various DC voltages including 24VDC, 48VDC, and 62.5VDC.