What this MCCB is and where it fits
The Siemens 3VA2220-7MS32-0JA0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous current, 3-pole, built specifically for starter protection duty. That means it's the overcurrent and short-circuit protection device between a motor starter contactor and the motor — it handles the high inrush without nuisance tripping, but clears fast on a bolted fault. The ETU310M electronic trip unit gives you adjustable thermal and magnetic curves, so you can dial it in for the motor's locked-rotor characteristic. It carries a shunt trip release (STL) built in, which lets a safety PLC or E-stop relay drop the breaker remotely. The interrupting capacity is serious: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and still 52.5 kA at 690 V. Those numbers mean it can sit on a high-fault panel without needing a current-limiting fuse upstream — the breaker itself is the point of selectivity. At 200 A continuous, it handles motor loads in that range; the thermal derating curve shows full 200 A up to 50 °C, then drops to 192 A at 55 °C, 188 A at 60 °C, 184 A at 65 °C, and 180 A at 70 °C. If your panel ambient runs above 50 °C, you need to account for that in the load calculation. Panel footprint: 105 mm wide, 181 mm tall, 86 mm deep. That's a standard SENTRON 3VA frame size — it bolts into the same mounting pattern as other 3VA breakers in this current class. The maximum power loss is 75 W, so plan some ventilation if you're packing several in a closed cabinet.
What's in the box and what's not
The breaker ships as a complete unit with the ETU310M trip unit and the shunt trip (STL) installed. The supplied basic switch is order code 3VA2220-7MS32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL32. There's no undervoltage release, no auxiliary contact block, no ground-fault monitoring, and no communication function — this is a plain-vanilla starter protection breaker with remote shunt trip capability. If you need auxiliary contacts or a UVR, you'll add them separately. The trip indicator is not fitted, so you won't get a visual flag on the front; the shunt trip gives you the electrical status feedback.
Temperature and handling notes
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The rated insulation voltage is 800 V, which covers 690 V systems with margin. The mechanical endurance is 20,000 operations — that's the latching mechanism life, not the electrical life under load. For motor starting duty, the electrical life will be lower depending on the switching frequency and load current.