The interrupting capacity reaches 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — these numbers govern the fault-current headroom at the point of installation. An undervoltage release (UVR) is built in, so the breaker trips if control voltage drops below the dropout threshold — common in emergency-stop or safety-disconnect circuits.
Above that it derates: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C.
Auxiliary contacts and trip alarm
The trip alarm changes state only on a fault trip — not on manual switching — so it can feed a separate alarm input to a PLC or annunciator. The integrated auxiliary trip accessory carries order code 3VA9608-0BB11. No communication function or phase-failure detection is built in; this is a straightforward thermal-magnetic MCCB with no electronic trip unit.