What it is and what it handles
The Siemens SENTRON 3VA2163-6HN32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. It's designed for line protection, meaning it sits at the incoming feeder to protect the distribution bus, not a specific motor or load. The interrupting ratings tell the real story: 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA figure at 240 V puts it in the high-interrupting-capacity class — it'll clear a massive fault on a low-voltage distribution transformer secondary without the breaker itself becoming a hazard.
Panel fit and wiring
Footprint is 105 mm wide, 181 mm tall, 86 mm deep. That width is a standard 105 mm for a 3-pole MCCB in this class — it'll drop into a cutout sized for the SENTRON 3VA family without panel modification. The shunt trip (STL) on this variant means you can remotely trip it via a control signal, useful for emergency-stop circuits or undervoltage protection schemes. Power loss is a maximum of 4 W at rated current, so heat buildup in a dense panel is minimal. The two integrated auxiliary switches (HQ design) give you status feedback — open/closed indication back to a PLC or annunciator without needing external contact blocks.