EATON Cutler-Hammer Series EATON CLNSURGE, Circuit breaker surge protective device, 50 to 60 Hz Frequency, 2 Pole, 10 kA Short Circuit, 18 kA Peak Surge Current, 3 kA Nominal Discharge, Single Split-Phase ph, Environmental Conditions: -40 to 122 deg F Operating Temperature, 2.981 in H x 1.98 in W x 3.071 in L Dimensions