The Siemens 3VA2110-7MN32-0JA0 is a 3-pole IEC frame 160 molded-case circuit breaker with a 110 kA interrupting capacity at 415 V (breaking capacity class C), sized for motor protection via the ETU350M LSI electronic trip unit. The 100 A continuous rating (In) with an adjustable overload range (Ir) from 40 A to 100 A means you can dial in the exact motor full-load current without swapping the breaker body — critical for matching a motor nameplate on the line. Short-circuit protection is set via Isd (3–15 × Ir) and a fixed instantaneous pickup Ii at 15 × In, giving you selectivity headroom downstream.
What the Ratings Mean for Fit
The 110 kA Icu at 415 V is the ultimate short-circuit withstand — it tells you this breaker can safely clear a fault up to that level without welding contacts or rupturing the case. In a 400 V industrial panel with a transformer upstream that can deliver 65 kA or more, this class C rating gives you the SCCR headroom the site electrical engineer needs on the coordination study. The adjustable LSI curve (Ir, Isd, Ii) means you are not locked into a fixed thermal-magnetic characteristic; the ETU350M lets you shape the trip for motor start-up inrush without nuisance tripping, then still provide instantaneous protection for a bolted fault. The shunt trip (STL) is rated 110–127 V DC and AC 50/60 Hz — a common control voltage range for emergency-stop or remote-trip circuits in North American and European panels. Verify the control transformer secondary matches that band; the coil is not universal 24 VDC.