The Siemens SENTRON 3VA2110-7MN32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. It's designed specifically for motor protection, with phase failure detection built in and an undervoltage release (UVR) fitted as standard.
Breaking capacity and fault clearing
This MCCB delivers 330 kA interrupting capacity at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA figure at 240 V means it can safely clear a high-fault bolted short on a 240 V secondary side without the upstream transformer needing to coordinate — it's sized for high-available-fault installations.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON distribution panels and most DIN-rail-mount enclosures. The 86 mm depth leaves room behind the gland plate for cable bends without forcing a deeper enclosure.
Motor protection specifics
Designed as a motor protection breaker, it includes phase failure detection — if one phase drops, the breaker trips before the motor runs single-phase and cooks the winding. The undervoltage release (UVR) drops the breaker on a sag or loss of control voltage, which is useful for coordinated stop sequences on conveyors or pumps. No communication function or ground-fault monitoring is fitted on this variant.
Thermal and environmental range
Operates from -25 °C to 70 °C ambient, stores from -40 °C to 80 °C. Maximum power dissipation is 12.5 W — low enough that side-by-side mounting in a sealed enclosure won't push internal temps past the breaker's 70 °C ceiling, but worth checking if you're packing six of these in a small stainless box.