Altech 8A 3 Pole Thermal Magnetic Circuit Breaker, 480Y/277V R. Circuit Breaker Type: MCCB. Reset Actuator Type: Handle. Overall Dimensions: 96.1 x 52.5 x 83.5mm. Overall Depth: 83.5mm. Tripping Mechanism: Thermal-Magnetic. Terminal Contact Type: Screw. Tripping Characteristics: Type D. Breaking Capacity at Maximum Voltage Rating: 10 kA. Overall Length: 96.1mm. Special Features: IP20 Termination Protection, Positive Trip Indicator, Supplementary Protector. MPN: 3DU8R