What the ratings mean for a panel fit
The Siemens SENTRON 3VA2110-7MS36-0AG0 is a 3-pole molded case circuit breaker rated for a continuous current of 100 A across the full 40 °C to 70 °C ambient range — no derating needed up to that temperature, which simplifies panel thermal budgeting. Its breaking capacity of 330 kA at 240 V and 242 kA at 415 V means it can safely interrupt very high fault currents typical on large transformer secondaries or busway feeds, so it fits as a main or feeder breaker in high-available-fault-current installations. The ETU310M electronic trip unit provides adjustable overload and short-circuit protection curves, giving the panel builder flexibility to coordinate with downstream devices. At 690 V the breaking capacity drops to 3.7 kA — that's the limit for 690 V line-to-line circuits, so if you're feeding a 690 V motor drive, verify the fault current at that point doesn't exceed this value.
Starter protection version — what that means on the line
This is the starter protection version of the 3VA2 frame, meaning it's configured for motor branch-circuit protection with the ETU310M release tuned for motor-starting inrush and overload profiles. The built-in 1 auxiliary switch plus 1 trip alarm switch HP gives a clean signal back to the PLC or annunciator when the breaker trips on fault, without needing an add-on module. Out here in the grease on a rotating-equipment route, that trip alarm is what tells you a motor locked rotor or a phase imbalance took out the breaker before you walk the whole line.
Physical fit — dimensions for panel layout
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width for a 3-pole 100 A MCCB is standard for the SENTRON 3VA2 frame, so it drops into the same DIN-rail or mounting-plate footprint as other 3VA2 breakers. The 86 mm depth keeps the body behind the panel door without interfering with gland plates or busbar shrouds in most enclosures.