What this MCCB delivers
The Siemens 3VA2220-7MQ32-0LL0 is a 3-pole SENTRON molded case circuit breaker rated for 200 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries a 330 kA interrupting capacity at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 5.4 kA at 690 V. That SCCR headroom means it can be placed upstream of a distribution panel without worrying about cascading failure during a bolted fault. This is the motor protection version, fitted with an ETU860M electronic trip unit that includes phase failure detection and ground fault monitoring via summation current formation on the L-conductor. The adjustable response time tr max is 15 seconds, giving you coordination flexibility with downstream motor starters. Communication function is built in, so it can report status and trip events to a higher-level control system without an add-on module. Rated insulation voltage is 800 V, and maximum power loss is 46 W. The IP40 front protection keeps dust out of the enclosure face; the breaker itself is designed for panel-mount installation inside a switchboard or motor control center. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Panel fit and dimensions
The 3VA2220-7MQ32-0LL0 measures 105 mm wide, 181 mm high, and 86 mm deep. That 86 mm depth is the dimension from the mounting surface to the front of the breaker — relevant when calculating enclosure depth clearance, especially in retrofit panels where busbar or wiring space is tight. The 105 mm width means it occupies three 35 mm DIN-rail modules (assuming standard 17.5 mm per pole spacing), so it drops into a standard 3-pole MCCB footprint.
Motor duty capability
For AC-3 motor switching duty, this MCCB handles 55 kW at 230 V and 75 kW at 400 V. That covers a wide range of induction motor sizes — a 75 kW motor at 400 V is roughly a 100 hp machine, so this breaker suits the main feeder for a moderate motor control center bucket. The latching endurance of 20,000 operations gives a solid mechanical life for a breaker that isn't cycled daily.