it is both UL listed and ANSI certified
The screws will also fit old style Siemens EQ and Murray Load Centers that are 12 to 42 circuit
Schneider Electric/Square D QO 2-Pole Standard miniature circuit breaker features Thermal Magnetic Molded Case for extra protection
240Material:Aluminum BusIP/NEMA Rating:1Circuits:42Phase:3Type:Main Lug
4) provides 100k AIC flexibility from 100 up to 225 amps
Eaton CHB240 40A, 2P, 120/240V, Type CHB, 10 kAIC, CB it is both UL listedEaton CHB240 40A, 2P, 120 240V, Type CHB, 10 kAIC, CB 40 Amp, 2 Pole, Miniature Industrial Circuit Breaker, Type CHB, Bolt On, 10 kAIC, 120 240 VAC. Only for use with Vintage C H Type PB Panelboards