What this MCCB does and the ratings that matter
The frame rating is 1200 A, which tells you the physical breaker shell and bus system are sized for that maximum, but the trip unit inside is set for 100 A. Breaking capacity is the headline number here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. Rated insulation voltage is 800 V, so the internal clearances and creepage distances are designed for 600 V class systems and some 690 V applications, though the breaking capacity at 690 V drops to 3 kA — that's a limitation to watch if you're on a 690 V network.
The 86 mm depth includes the arc chute cover and terminals; make sure your enclosure has at least 100 mm clearance in front for the breaker to swing open during maintenance. Panel builders should note that this breaker ships with a trip indicator so you can see at a glance whether it tripped on fault versus being manually switched off.
Auxiliary switching and accessories
That means you get two form-C contacts for status feedback (open/closed) and one dedicated contact that changes state only when the breaker trips on overcurrent or short circuit — useful for remote alarm annunciation. The supplied basic switch is 3VA20106HN320AA0, which is the internal switching mechanism.