What this MCCB is rated for
The Siemens SENTRON 3VA2163-7HN32-0KH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Interrupting capacity hits 330 kA at 240 V, 242 kA at 415 V, and still holds 3.7 kA at 690 V. That's a short-circuit rating that covers most industrial service-entrance and distribution applications without needing a current-limiting fuse upstream. Designed for line protection, this MCCB carries a shunt trip release (STL) plus two auxiliary switches and one trip alarm switch (HQ configuration). The shunt trip lets you remotely trip the breaker from a safety circuit or emergency-stop chain — critical for lockout-tagout compliance. If it's not locked, it's not safe, and this breaker gives you the means to positively de-energize.
Panel fit and dimensions
Mounts in a standard panel footprint: 105 mm wide, 181 mm tall, 86 mm deep. The 3VA frame size matches the common 3VA2 cutout pattern, so it drops into existing Siemens MCCB mounting bases without re-drilling. Power loss is 4 W maximum — negligible for thermal budgeting inside a sealed enclosure.