What it is and what the ratings mean
The Siemens SENTRON 3VA2110-7MN32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full operating temperature range from 40 °C to 70 °C — no derating needed as the panel warms up. That 100 A holds steady from 40 °C all the way to 70 °C, so you don't have to oversize the frame for a hot enclosure. The breaking capacity tells you where it can safely interrupt a fault: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. For a motor protection circuit, the 3.7 kA at 690 V is the number to watch if you're feeding a 690 V drive — that's still substantial fault clearance for a motor branch. The trip time band is 4 s minimum to 17 s maximum, and it includes a trip indicator and voltage trigger for remote signaling. This MCCB is designed specifically for motor protection — it includes phase failure detection, so it will trip if one phase drops out, preventing single-phasing damage to the motor. The design includes a shunt trip release (STL) for remote tripping, and the auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ. No undervoltage release is fitted, and there is no ground-fault monitoring version on this variant.
Panel integration and footprint
The dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard MCCB footprint that fits most DIN-rail or panel-mount enclosures. If you're swapping out an older frame, check that the 105 mm width matches your existing bus bar spacing and that the 86 mm depth clears the gland plate or door. The power loss is 10 W maximum, so thermal management inside a sealed enclosure is manageable — no forced cooling needed for a single unit, but factor it into the overall heat budget if you're packing several breakers in a small cabinet.
Environmental limits and storage
Operating temperature range is -25 °C to 70 °C, and storage range is -40 °C to 80 °C. The storage limit is the handling limit — if the breaker sits in an unheated warehouse in winter, it's fine down to -40 °C as long as it's not powered. The operating range covers most industrial panel environments, including hot motor control centers.