What the ratings mean for your panel
The Siemens 3VA2110-7MS32-0BA0 is a SENTRON molded case circuit breaker (MCCB) in the starter protection version, rated 100 A continuous current (Iu) and carrying a 330 kA breaking capacity at 240 V — that's the short-circuit current it can safely interrupt at that voltage level, sized for high-fault installations like transformer secondaries or large motor control centers. At 415 V and 440 V it still holds 242 kA, and at 690 V it drops to 52.5 kA, which still covers most industrial service-entrance requirements. The 3-pole form factor with the ETU310M electronic trip unit gives adjustable overload and short-circuit protection curves, and the integrated undervoltage release (UVR) trips the breaker when control voltage drops — standard for safety circuits that need to drop a starter on loss of control power. The thermal derating curve is flat from 40 °C to 50 °C — still 100 A — then tapers to 90 A at 70 °C. That means in a warm enclosure you lose only 10 % of the rating at the upper operating limit, so the breaker can be packed tighter than a thermal-only MCCB without losing headroom. Power loss maxes at 75 W, which is moderate for a 100 A frame; factor that into your enclosure heat budget.
Panel fit and integration
Footprint is 105 mm wide, 181 mm tall, 86 mm deep — standard SENTRON 3VA2 frame size. Mounts on a DIN rail or direct panel; the 86 mm depth leaves room behind a 200 mm deep enclosure door for wiring and the auxiliary trip module (3VA9608-0BB11) that ships with this variant. No auxiliary contact block is included, so if you need status feedback to a PLC, order a separate 3VA9 auxiliary switch.