What this MCCB is and what it does
The Siemens 3VA2110-5MN36-0CL0 is a SENTRON molded case circuit breaker (MCCB) built for motor protection — 100 A continuous, 3-pole, with an undervoltage release integrated. It's the kind of breaker you spec into a motor branch circuit when you need thermal-magnetic protection plus a UVR for coordinated shutdown. Rated 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault-current panels without cascading upstream.
Ratings that matter for fit
The 100 A rating holds flat from 40 °C to 70 °C — no derating curve to chase in a warm enclosure. Breaking capacity steps down with voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 3.7 kA at 690 V is the weak point; if your system runs 690 V with a high available fault current, this breaker won't clear it. Phase failure detection is built in, and the trip indicator gives a quick visual on the panel door.
Panel fit and wiring
Footprint is 105 mm wide, 181 mm tall, 86 mm deep — standard SENTRON 3VA2 frame size. Mounts on a DIN rail or direct panel. The auxiliary switch block comes configured as 2 aux + 1 trip alarm + 1 electrical alarm (HQ), so you get status feedback without adding a separate module. Undervoltage release (UVR) is factory-fitted; verify coil voltage against your control circuit before wiring.