The Eaton BAB3040H is a 40A, 3-pole Quicklag industrial thermal-magnetic circuit breaker designed for commercial branch circuits and industrial environments. It features a bolt-on mounting style for secure installation in Eaton Pow-R-Line, Cutler-Hammer, and Westinghouse panelboards. This breaker offers reliable thermal-magnetic protection and is HACR rated for HVAC applications. It provides flexible power feed connections and is compatible with field-mountable accessories for easy customization. It's a suitable replacement for older QNBL3040 breakers..This is a 40A, 3-pole, 3-phase thermal-magnetic circuit breaker with a 10kAIC interrupt rating at 240VAC. It features a bolt-on mounting style and box lug terminals compatible with 14-4 AWG copper or aluminum wire. The breaker has a fixed thermal and fixed magnetic trip adjustability, with Long-Time and Instantaneous trip functions. It is HACR rated and UL Listed and CSA Certified.