What this MCCB does on your line
The SENTRON 3VA2163-6HN32-0DC0 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. It's designed for line protection, meaning it sits at the feeder or distribution point to clear faults before they cascade downstream. Breaking capacity runs 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V is the headline number: it handles high available fault current at typical North American panel voltages without needing a current-limiting fuse upstream. The unit ships with an undervoltage release (UVR) and two auxiliary switches HQ — the HQ designation means high-auxiliary contact reliability for signaling the breaker's open/closed/tripped state back to a PLC or annunciator panel. No communication function onboard, no ground-fault monitoring version, no voltage trigger. This is a straight-ahead thermal-magnetic or electronic-trip MCCB with UVR for safety circuits that need to drop the breaker on loss of control power.
Panel fit and mounting
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the body only — account for handle throw and wiring space behind the panel. Three-pole format means it occupies three module spaces on the DIN rail or mounting plate. The 63 A frame is compact enough for a distribution sub-panel but still leaves finger room for lug torqueing on 2/0 AWG or smaller conductors.