Cutler-Hammer QuickLag Thermal Magnetic Circuit Breaker, Type QBHW, 120/240 VAC, 30 A, 22 kA Interrupt, Non-Interchangeable/Thermal Magnetic Trip, 1 Pole, 14 to 4 AWG Wire, Bolt-On Mount, 40 deg C, 3.7 in L x 1.2 in W x 4.7 in H