IEC Supplementary Protector Amps 20 A AC Voltage Rating Not Rated Max AIR Rating 10kA at 440V DC Series NDB2Z-63 C20/2 Curve Type C DC Voltage Rating 440V DC Number of Poles 2 Phase 2 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 1.42 in Depth 2.91 in