The Siemens SENTRON 3VA2163-5MN32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated at 63 A across the full ambient range from 40 °C to 70 °C, designed specifically for motor protection with integrated phase failure detection. It carries a shunt trip (STL) auxiliary release and two HQ auxiliary switches, making it a fit for motor control centers where you need a coordinated trip under loss-of-phase or overcurrent.
Breaking capacity and voltage grading
This MCCB delivers 187 kA interrupting capacity at 240 V, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V is high for a 63 A frame — it handles heavy fault currents on the secondary side of a distribution transformer without cascading upstream. The steep drop at 690 V (3.7 kA) means this is not a 690 V main; it belongs on a 400–500 V motor feeder where the available fault current stays under the curve.
Motor protection and auxiliary wiring
The motor protection design includes phase failure detection, so the breaker trips on loss of one phase — a common failure mode that single-phases a motor and burns the winding. The shunt trip (STL) allows remote trip via a control signal (e.g., from a PLC or emergency-stop relay), and the two HQ auxiliary switches provide status feedback (open/closed) to the control system. The supplied basic switch is 3VA21635MN320AA0, which is the internal switching mechanism.
Dimensions and panel fit
At 86 mm deep, 105 mm wide, and 181 mm high, it fits a standard SENTRON 3VA2 frame footprint. The 105 mm width is three pole widths at roughly 35 mm per pole — confirm the DIN-rail or mounting-plate layout against the existing breaker cutout. Power loss is 4 W maximum, negligible for thermal budgeting inside a sealed enclosure.
Environmental range and storage
Operating temperature spans -25 °C to 70 °C; storage extends from -40 °C to 80 °C. The 63 A rating is flat across the full operating range — no derating needed up to 70 °C, which simplifies panel design in hot ambients.