What this MCCB is and what the ratings mean for fit
The Siemens 3VA2220-7MS32-0JH0 is a SENTRON 3-pole molded case circuit breaker rated for 200 A continuous current with an ETU310M electronic trip unit. The interrupting capacity at 240 V is 330 kA — that means it can safely clear a fault up to 330,000 A at that voltage without welding contacts or rupturing the case, which is critical for high-fault installations like transformer secondaries or large motor control centers. At 415 V and 440 V the rating holds at 242 kA, and at 690 V it still interrupts 52.5 kA, so this breaker covers low-voltage distribution up to 690 V with serious fault-current headroom. The continuous current rating of 200 A holds flat from 40 °C through 50 °C ambient — no derating needed in a typical 40 °C panel. Above that it steps down: 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. If your enclosure runs hot, plan for the derate curve rather than the nameplate 200 A. This is a starter-protection version (product version field), meaning the trip curve is shaped for motor starting inrush — it allows the temporary overload without nuisance tripping, then clears a locked-rotor fault quickly. The ETU310M release is an electronic trip unit with adjustable settings; the exact trip curve should be confirmed against the motor full-load amps and coordination study.
Lifecycle and sourcing reality
The base switch assembly is order code 3VA2220-7MS32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL32. If you already hold those sub-assemblies as spares, this complete breaker is a drop-in replacement for them in a panel.
Panel integration and wiring
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint for this current class — it fits the same DIN-rail or panel-mount cutout as other 200 A frame breakers. The 86 mm depth leaves room for rear-connection busbars or cable lugs in a 200 mm deep enclosure. Auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ type). The shunt trip (STL) is built in — no undervoltage release on this variant. If your safety circuit requires an undervoltage release for emergency stop, this code does not include it; you would need a different suffix or an external contactor. Maximum power loss is 75 W. In a sealed, non-ventilated enclosure, that heat must be managed — either through enclosure sizing or forced ventilation, especially if multiple breakers are ganged. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.