The Siemens SENTRON 3VA2110-5MN32-0BL0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's the motor protection variant, fitted with an ETU350M electronic trip unit, so it's set up for overload and phase-failure protection on motor loads right out of the box.
Breaking capacity and fault clearing
This MCCB delivers 187 kA breaking capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V.
Motor protection design
The motor protection variant includes phase failure detection and an undervoltage release as standard, so it will trip on loss of phase or significant voltage sag — both conditions that damage motor windings. The ETU350M release is an electronic trip unit, meaning it offers adjustable overload curves and better accuracy than a thermal-magnetic breaker, especially in warm panels where ambient compensation matters.
That 105 mm width for a 3-pole 100 A MCCB is standard for the SENTRON 3VA frame — it occupies three 35 mm DIN-rail modules, so it fits a standard 600 mm wide enclosure with room for side-mounted accessories.