What this 200 A MCCB covers
The Siemens 3VA2220-7MN32-0KH0 is a SENTRON 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 200 A, with the ETU350M electronic overcurrent release. It is the motor protection version, meaning the trip unit is configured for the higher inrush and thermal characteristics of motor loads rather than straight feeder protection. Breaking capacity runs 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. That puts it in the high-interrupting class — enough headroom for most industrial distribution panels without cascading upstream fuses. The frame carries a shunt trip release (STL) as the auxiliary release design, plus 2 auxiliary switches and 1 HQ trip alarm switch. Phase failure detection is built in. No undervoltage release, no ground fault monitoring, no communication module on this variant.
Current derating and thermal budget
The 200 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 192 A, at 60 °C to 188 A, at 65 °C to 184 A, and at 70 °C to 180 A. Maximum power loss is 75 W — something to account for in the enclosure thermal calculation if the panel runs warm. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage limit governs handling and warehousing, not running conditions.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it lands on a DIN rail or mounts directly to a backplate. The 86 mm depth keeps it inside a 200 mm enclosure depth with room for wiring gutters.