At 240 V it interrupts 187 kA; at 415 V that drops to 121 kA, and at 690 V to 7.5 kA — so the interrupting capacity is heavily phase-to-phase voltage dependent, and the 690 V figure governs any 690 V line-to-line application.
The 400 A rating holds up to 50 °C ambient. Above that, the breaker must be derated: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. The maximum power loss is 96 W, which contributes to the enclosure thermal load and should be factored into the cabinet cooling calculation.
Dimensions are 110 mm deep, 184 mm wide, and 248 mm tall.
The SENTRON 3VA series carries IEC/EN 60947-2 certification for molded case circuit breakers. The breaker has no trip indicator and no voltage trigger.