What it is and what it does
The Siemens 3VA2110-7MN36-0DA0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection. It carries a continuous current rating of 100 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. The 3-pole construction and integrated phase failure detection make it a direct fit for three-phase motor branch circuits in distribution panels or motor control centers.
Key ratings — what they mean for fit
Rated short-circuit breaking capacity hits 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. At typical industrial 400 V class supply, the 242 kA figure means this breaker can interrupt very high fault currents without upstream cascading — it is sized for high-capacity transformer secondaries or large motor feeds. The undervoltage release (UVR) is factory-integrated; it trips the breaker when control voltage drops, which is standard for motor protection schemes that need to prevent automatic restart after a power dip. Maximum power loss is 12.5 W — relevant for thermal management inside a sealed enclosure. The breaker is designed for motor protection, which means its trip curve is shaped to handle inrush without nuisance tripping while still clearing a locked-rotor fault. The basic switch assembly is order code 3VA21107MN360AA0, so replacement of the switching mechanism is possible without swapping the entire breaker frame.
Mounting and integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in the SENTRON 3VA2 frame — it fits existing panel cutouts and busbar spacing for that platform. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The breaker has no communication function and no trip indicator, so it is a straightforward electromechanical device — no firmware to manage.