Its 2 A rated continuous current and 2 A AC-3 operational current at 400 V size it for small motor loads up to 0.75 kW at 400 V. The breaking capacity tells you where this breaker can safely interrupt a fault without upstream damage: 100 kA at 240 V AC, 85 kA at 400 V AC, 50 kA at 500 V AC, and 10 kA at 690 V AC. At a typical 400 V industrial supply, 85 kA means it handles high-fault-current panels — common near large transformers or in heavy manufacturing. The 690 V rating at 10 kA is the ceiling; do not use this breaker above that voltage. Three poles for three-phase circuits. Front-side main circuit connections.
Mounts by screw fixing in any position. Dimensions: 70 mm deep, 90 mm wide, 130 mm high. Zero clearance required at the back and sides — no derating for side-by-side stacking. Shock rated at 12g for 11 ms. Installation altitude limited to 2,000 m above sea level without derating.
Protection characteristics
Overcurrent and short-circuit release is magnetic-only — no thermal bimetal for overload protection. This is normal for an MCCB used in a starter combination where the overload relay sits in the contactor. No ground-fault detection, no phase-failure detection. Surge voltage resistance rated at 8,000 V. Operating frequency at AC-3 duty is 15 operations per hour maximum.