Interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V — that 187 kA figure at 240 V tells you this breaker is built for high-fault utility or transformer-fed secondary buses where the available fault current is serious.
The 400 A rating is flat across the 40–70 °C operating band — that is unusual and valuable for a panel that runs hot; most MCCBs start derating above 40 °C. Short-time withstand is limited to 5 kA for 1 s — if you need selective coordination downstream of a transformer with a longer delay, verify the let-through energy against your upstream breaker's trip curve. Time delay adjustable from 4 s minimum to 17 s maximum — covers motor acceleration profiles for standard induction motors without nuisance tripping on start. Physical footprint: 248 mm tall, 138 mm wide, 110 mm deep — standard SENTRON 3VA panel cutout; drops into existing 3VA mounting bases.
Includes a trip indicator and phase-failure detection — both standard on the motor-protection variant.