What this MCCB is for
Three poles, rated 100 A continuous, with phase-failure detection built in — so it catches a lost phase before the motor cooks.
That's typical for SENTRON breakers but worth confirming if you're used to breakers that lose capacity above 40 °C. Breaking capacity is 330 kA at 240 V AC, 242 kA at 415/440 V, and 3.7 kA at 690 V. At 690 V the 3.7 kA figure is lower, so check your available fault current if you're running 690 V motors. It fits the same DIN-rail or panel-mount cutout as other 3VA2/3VA1 breakers, so swapping in a panel designed around a 3VA2110-7HK42-0AA0 is a mechanical drop-in. The wiring and bus connections are the same.
Motor protection specifics
This is the motor protection version of the 3VA2 frame — it includes thermal-magnetic trip elements tuned for motor starting inrush (4 to 17 seconds trip delay range). Phase failure detection is active, so a single-phased motor sees a trip rather than a burn.