It holds a 121 kA interrupting capacity at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell the real story: this breaker clears high-fault conditions without cascading upstream, which keeps selectivity intact on a distribution panel feeding motor control centers or sub-distribution boards. That simplifies ordering but means the breaker is sized to the load, not adjusted in the field. For a 100 A feeder on a 400 V three-phase supply, the 75.6 kA SCCR at 415 V gives ample headroom for most industrial service-entrance or panelboard applications.
At 55 °C it derates to 96 A, then 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. The IP40 front protection means it's suited for indoor panel mounting where no water spray is present; keep it behind a locked enclosure door in dusty environments.
The integrated auxiliary trip is specified as order code 3VA9608-0BB24 — that's the undervoltage release module that ships with the breaker. If you're replacing an existing 3VA breaker, verify that the auxiliary contact configuration (2 auxiliary switches HQ) matches your control wiring; the HQ designation indicates high-qualified contacts rated for signal-level switching.