The Siemens SENTRON 3VA2163-7MN32-0CH0 is a 3-pole molded case circuit breaker (MCCB) built for motor protection, carrying a full 63 A continuously from 40 °C all the way up to 70 °C — no derating needed in a warm panel, which is the kind of honest rating you want when the drive cabinet sits next to a hot motor. Its interrupting capacity is serious: 330 kA at 240 V, 242 kA at 415 V, and still 187 kA at 500 V, so it handles high-fault utility feeds or large transformer secondaries without breaking a sweat. The breaker ships with an undervoltage release (UVR) and a 2-auxiliary-switch plus 1 trip-alarm-switch HQ configuration, so it's ready for safety circuits and remote status feedback right out of the box.
What the ratings mean for your panel
The 63 A rating is flat across the full ambient range — that means no fudging the load schedule when the panel hits 60 °C in summer; you get the full 63 A. The 330 kA at 240 V tells the coordination engineer this breaker can sit downstream of a large transformer or a generator paralleling bus without needing a current-limiting fuse upstream — it's self-protecting at those fault levels. Phase failure detection is built in, so a lost phase on the line side won't let the motor single-phase and cook the winding.
Integration and mounting
The 3VA2163-7MN32-0CH0 fits a standard 3-pole MCCB footprint: 105 mm wide, 181 mm tall, 86 mm deep — verify the DIN-rail or screw-mount hole pattern against your panel backplate before ordering. It's designed for motor protection, so pair it with a contactor and overload relay downstream for a full motor starter group.