Siemens 3VA2163-7MS32-0JA0 — 63 A SENTRON MCCB with ETU310M, Starter Protection
The Siemens 3VA2163-7MS32-0JA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with an ETU310M electronic overcurrent release and a built-in shunt trip (STL) for remote tripping. It carries a breaking capacity of 330 kA at 240 V, 242 kA at 415 V, and 52.5 kA at 690 V — numbers that matter when you are protecting a motor branch circuit against high-fault utility feeds or large transformer secondaries. The starter protection designation means the trip curve is shaped to coordinate with contactor and overload relay in a motor starter combination, not a generic distribution feeder.
What the key ratings mean for your panel
Rated continuous current Iu is 63 A across the ambient range from 40 °C to 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C (–). That means in a warm enclosure — say a panel with drives and contactors — you should size the breaker for the actual ambient, not the nameplate 63 A. The insulation voltage Ui is 800 V, so it can be used on 690 V line-to-line systems without a voltage derating. Maximum power loss is 75 W; factor that into your enclosure thermal budget. The ETU310M release provides adjustable thermal-magnetic or electronic trip characteristics depending on the exact firmware variant — this one is the starter protection version, so the long-time and short-time pickup are preset to coordinate with motor-starting inrush without nuisance tripping. The shunt trip (STL) allows a remote pushbutton or PLC output to open the breaker instantly, which is standard for emergency-stop circuits that need to kill motor power without pulling the handle.
Panel integration and dimensions
Dimensions are 181 mm high, 105 mm wide, 86 mm deep (–). It mounts on a DIN rail or directly to a backplate via the screw terminals. The 105 mm width is a standard 3-pole MCCB footprint — it will fit the same cutout as other SENTRON 3VA2 three-pole breakers. No auxiliary contacts are included, but the shunt trip (STL) is integrated, so you do not need a separate undervoltage release module for remote tripping.