The Siemens SENTRON 3VA2163-7MN36-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full operating temperature range from -25 °C to 70 °C, with no derating needed up to 70 °C. Its interrupting capacity reaches 330 kA at 240 V AC, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — the sharp drop at 690 V reflects the arc extinction limits of the 3-pole series-trip design, so verify the fault current at your system voltage before specifying.
Motor protection and internal configuration
This MCCB is explicitly designed for motor protection, which means the trip curve and thermal-magnetic response are tuned for the inrush and overload profile of induction motors, not for general distribution or resistive loads. Phase failure detection is built in, so a lost phase on the line side will trip the breaker before single-phasing damages the motor — a critical feature for unmonitored or remote motor circuits. The unit carries three high-quality auxiliary switches for status feedback to a PLC or annunciator panel, and the basic switch assembly is order code 3VA2163-7MN36-0AA0.
Mechanical footprint and panel fit
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA2 frame size. The 105 mm width occupies three 35 mm DIN-spaces (standard 17.5 mm per module), so it fits a conventional DIN-rail enclosure without overhang. Maximum power loss is 4 W, which keeps internal cabinet heating manageable; no forced ventilation needed for a single unit, but a multi-breaker panel should account for cumulative dissipation in the thermal budget.