Amperage Rating: 40 Amp Number of Poles: 3-Pole (3P) occupying 3 panel spaces Voltage Rating: 120/240 VAC Interrupting Capacity (AIC): 10 kA at 120/240 VAC Mounting Style: Plug-On (designed strictly for 3-phase Square D QO load centers and NQ panelboards) Trip Technology: Thermal-magnetic mechanism featuring "Qwik-Open" technology to interrupt dangerous faults within 1/60th of a second