The Siemens SENTRON 3VA2110-0MN36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current — and it holds that 100 A all the way up to 70 °C ambient, so no derating headache in a hot panel next to a drive or transformer. It's built for motor protection duty, with an ETU350M electronic trip unit that gives you adjustable trip classes: 10A, 10E, and 20E. That means you can dial in the overload curve to match the motor start-up profile — 10A for quick-starting pumps, 20E for high-inertia loads like fans or conveyors that take a few more seconds to spin up. That's the kind of feature that saves a bearing replacement out here in the grease. Rated insulation voltage is 800 V, and the interrupting ratings are serious: 440 kA at 415 V and 187 kA at 690 V. That's strong enough for most low-voltage distribution downstream of a large transformer — it'll clear a bolted fault without the arc flash turning into a catastrophe.
Sizing and selectivity notes
At 230 V AC-3 duty, this MCCB handles 30 kW motor loads. That's a solid match for a 37 kW (50 hp) motor frame with a bit of headroom, or a 30 kW direct-on-line start. The 100 A continuous rating at 70 °C means you can run it at full nameplate in a warm enclosure without bumping up a frame size.
If you're putting this in a non-conditioned warehouse or an outdoor enclosure in a northern climate, the cold-start limit is fine down to -25 °C.