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.
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. 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 supplied basic switch is 3VA21635MN320AA0, which is the internal switching mechanism.
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.