That matters in a mill environment where a corroded contactor or loose lug can drop a phase without tripping an upstream breaker.
Power ratings: 22 kW at 230 V, 50 hp at 460/480 V, 60 hp at 575/600 V. These are the maximum motor sizes the breaker can protect at those voltages — match them to your motor nameplate FLA, not the horsepower alone.
Mounting and Clearance
Mounts in any position. Clearance requirements: 50 mm above, 50 mm below, 10 mm to the side. At 240 V no side clearance is required — that is a useful detail for tight panels where you are stacking breakers in a row. At 400 V you need 160 mm above, at 500 V 125 mm, at 690 V 100 mm. The higher the voltage, the more arc-chamber space needed above the breaker. Dimensions: 55 mm wide, 140 mm tall, 149 mm deep. The 55 mm width is three 18 mm module slots — standard for a motor-protective device in this class. Terminal capacity: 2x (1–35 mm²) or 1x (1–50 mm²) solid or stranded, with M6 screw-type terminals on the main circuit.
Environmental Range
Operating temperature: -20 to +60 °C. That covers most mill environments — the storage range matters if the spare sits in an unheated warehouse through a winter.