IEC Supplementary Protector Amps 20 A AC Voltage Rating 277V AC Max AIR Rating 5kA at 277V AC Series NDB2-63 D20/1 Curve Type D DC Voltage Rating Not Rated Number of Poles 1 Phase 1 Circuit Breaker Actuator Toggle Circuit Breaker Mounting Style DIN Rail Meets UL Type UL 1077 Terminal Connection Screw Clamp Trip Type Thermal Magnetic Application Supplemental Protection Min Wire Size 14 AWG Max Wire Size 4 AWG Length 3.21 in Width 0.71 in Depth 2.91 in