63 A motor protection MCCB with 330 kA interrupting capacity
The Siemens 3VA2163-7MN32-0HL0 is a SENTRON molded case circuit breaker rated for 63 A continuous at ambient temperatures up to 70 °C — no derating required across the full -25 to 70 °C operating range, per the spec table. That 63 A holds at every 5 °C increment from 40 °C through 70 °C, which simplifies panel thermal budgeting when the breaker shares an enclosure with other heat sources. Its interrupting capacity reaches 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. For a 480 V panel, that 187 kA SCCR gives substantial headroom above typical available fault currents in most industrial distribution boards — selectivity coordination studies will find this breaker easy to place downstream of a current-limiting fuse or larger MCCB. Designed specifically for motor protection, it includes phase failure detection and a trip indicator. The trip time band is 4 s minimum to 17 s maximum — a thermal-magnetic or electronic curve suited for starting inrush without nuisance trips on standard induction motors.
Auxiliary and release configuration
This variant ships with a shunt trip release (STL) for remote tripping, plus an auxiliary switch block: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch in HQ configuration. That gives four independent signal contacts for status feedback to a PLC or annunciator panel — enough to cover open/closed indication, trip event, and a spare alarm channel without adding an external relay. The basic switch assembly is order code 3VA2163-7MN32-0AA0, meaning the -0HL0 suffix adds the shunt trip and the full auxiliary contact set. No undervoltage release is fitted; if UVR protection is needed, that would be a different suffix variant.
Panel fit and thermal management
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a 3-pole frame that fits standard SENTRON mounting footprints. The 4 W maximum power loss at rated current is low enough that forced ventilation is not required in a typical IP54 enclosure, though side-by-side mounting without spacing will raise the internal ambient; the 63 A rating already accounts for that since it holds at 70 °C. Storage temperature range is -40 to 80 °C, so the breaker can sit in an unheated warehouse or truck without issue. Operating minimum is -25 °C, covering cold-start conditions in outdoor panels in most climates.