What this MCCB covers
The Siemens SENTRON 3VA2110-7MS36-0BH0 is a 3-pole molded case circuit breaker (MCCB) designed for starter protection — meaning it's built to sit ahead of a motor starter, handling both the short-circuit interruption and the overload coordination in one compact package. Rated 100 A continuously from 40 °C through 70 °C without derating, it holds its full current even in a warm cabinet. The frame size accepts adjustable thermal-magnetic trip units from 300 A up to 1500 A, so the same physical breaker can cover a wide range of motor or feeder sizes by swapping the trip module. Breaking capacity runs 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V — high enough for most industrial fault-current scenarios.
Built-in auxiliaries and release
This variant ships with an undervoltage release (UVR) plus two auxiliary switches and one trip-alarm switch (HQ type) factory-fitted. The UVR drops the breaker on loss of control voltage — critical for safety circuits where a downstream motor must not auto-restart after a power dip. The auxiliary contacts provide status feedback for the PLC or HMI; the trip alarm signals a fault condition separately from a manual open.
Physical fit and environment
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard MCCB footprint for panel mounting on a backplate or DIN rail adapter. Operating temperature range is -25 °C to +70 °C; storage from -40 °C to +80 °C. Maximum power dissipation is 12.5 W, which matters for thermal budgeting inside a sealed enclosure.