What this MCCB is and what it does
The Siemens 3VA2220-7MS32-0CC0 is a SENTRON molded case circuit breaker (MCCB) configured as a starter protector — 3-pole, 200 A rated continuous current (Iu), with an ETU310M electronic overcurrent release and an integrated undervoltage release (UVR). The 330 kA breaking capacity at 240 V means it can safely interrupt fault currents up to that level without upstream fuses or cascading failures — critical for high-fault panels near large transformers or motor control centers.
Breaking capacity across voltages
Rated breaking capacity drops from 330 kA at 240 V to 242 kA at 415 V and 440 V, then 187 kA at 500 V, and 52.5 kA at 690 V. For a 400 V distribution panel, the 242 kA figure still covers most high-fault installations; at 690 V the 52.5 kA rating suits industrial motor feeders with moderate fault levels.
Thermal derating and operating limits
The 200 A rating holds up to 50 °C ambient. Above that, current must be derated: 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. If the panel runs hot — near a drive cabinet or in a non-climate-controlled enclosure — factor that into the load schedule. The maximum power loss is 75 W, which adds to the enclosure's thermal budget.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA2 footprint. It mounts on a DIN rail or direct panel via the rear slots. The 86 mm depth leaves clearance for wiring gutters in a 200 mm deep enclosure; the 105 mm width fits a typical 3-pole MCCB slot in a distribution board.
Auxiliary and trip details
Comes with 2 HQ auxiliary switches (form C) for status feedback to a PLC or indicator lamp. The undervoltage release (UVR) trips the breaker when control voltage drops — standard for safety circuits that must open on loss of control power. The basic switch assembly is order code 3VA2220-7MS32-0AA0; the integrated auxiliary trip module is 3VA9608-0BB24. No voltage trigger, no communication function, no phase failure detection — this is a straightforward thermal-magnetic + electronic trip MCCB with UVR.
Environmental and storage
Operates from -25 °C to 70 °C; storage range is -40 °C to 80 °C. The wide storage range means it can sit in a cold warehouse or hot container without damage — the storage limit governs handling, not running.