400 A thermal-magnetic MCCB, 50 kA breaking capacity
It carries 50 kA Icu at 380–440 V AC 50/60 Hz per IEC 60947-2, and 70 kA at 220–240 V AC.
The TM-D trip unit combines thermal overload and magnetic short-circuit protection. Magnetic tripping is fixed at 4000 A. Rated for category A (no intentional time delay for selectivity with downstream breakers on short-circuit), 4000 electrical cycles at 415 V AC, and 10000 mechanical cycles.
Physical integration and environment
Dimensions are 255 mm high × 140 mm wide × 140 mm deep. The 45 mm pole pitch matches standard busbar systems. Fixed mounting on a backplate, with front-facing terminals for both line and load — no rear-connect option. IP20 finger-safe terminals, IK07 impact resistance.