The Siemens SENTRON 3VA2163-7MN32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C up to 70 °C — no derating needed as the panel warms. This makes it a solid choice for a motor protection circuit in a crowded enclosure where heat buildup is a given. Breaking capacity hits 330 kA at 240 V and still delivers 242 kA at 415/440 V, dropping to 187 kA at 500 V. At 690 V it manages 3.7 kA — enough for the high-voltage tail but not the primary interrupt rating. That 330 kA figure at 240 V means it can sit upstream of a high-fault panel without needing a current-limiting fuse ahead of it.
Motor Protection and Auxiliary Hardware
This MCCB is explicitly designed for motor protection, with phase failure detection built in. That means it will trip on a lost phase before the motor single-phases and cooks the winding — a common failure mode in older plants where a fuse blows and nobody catches it until the smoke appears. It ships with an undervoltage release (UVR) fitted, so the breaker drops out if control power is lost. That is a standard safety requirement on motor feeders in many jurisdictions — no separate UVR module to buy and install. Two HQ auxiliary switches are also integrated, giving you status feedback for the PLC or a remote annunciator without adding external contact blocks.
Panel Fit and Dimensions
The breaker measures 105 mm wide by 181 mm tall by 86 mm deep. Power dissipation is 6.5 W max at rated load, so thermal rise in the enclosure is manageable. No forced cooling required unless the panel is already dense with other heat sources.