The 50 kA Icu at 380 V AC (50/60 Hz) is the interrupting capacity at that voltage — it safely clears a fault up to that level without damage, per IEC 60947-2. At 440 V AC the same 50 kA holds; at 220/230 V AC it rises to 70 kA. That H breaking-capacity code means it handles high prospective fault currents common in distribution switchboards, so you can use it downstream of a transformer without cascading upstream breakers. The trip unit is rated 500 A at 50 °C — note the derating from the 630 A at 40 °C base. The magnetic trip threshold is fixed at 3500 A (about 5.6× In), which is typical for thermal-magnetic MCCBs protecting distribution feeders against short-circuits while allowing motor inrush.
Fixed-mount backplate installation, front-front connections (line and load both front-accessible). Dimensions: 255 mm high, 185 mm wide, 140 mm deep. The 44 mm pole pitch matches standard busbar spacing for 4-pole breakers. IP20 finger-safe terminals; IK07 impact resistance for panel mounting.