What it is and where it lands
The Siemens SENTRON 3VA2163-7HN32-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C, with a line-protection design — meaning it's built to protect distribution feeders and branch circuits, not motor loads. It carries a 330 kA interrupting capacity at 240 V AC, which drops to 242 kA at 415 V and 3.7 kA at 690 V. That's a serious short-circuit rating for a 63 A frame; it can clear a high-fault bolted arc upstream without self-destructing, which matters when you're feeding a panel downstream of a big transformer.
Ratings that decide the fit
The breaker holds its 63 A rating flat from 40 °C right up to 70 °C — no derating curve to worry about in a warm enclosure. That's uncommon; most MCCBs start dropping current above 40 °C. If your panel runs hot near a drive bank or a furnace wall, this one keeps delivering full rated amps. The shunt trip (STL) release lets you remote-trip the breaker from a safety circuit or an emergency-stop string, and the two auxiliary switches (HQ design) give you status feedback to a PLC or annunciator panel.
Panel fit and footprint
It measures 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON distribution blocks and panel-mounting kits. The 86 mm depth (3.39 in) means it clears shallow gland plates and back-panel wiring troughs without sticking out. No communication module on this variant, so it's a straight electromechanical breaker with no Modbus or PROFIBUS link — keep that in mind if you were planning remote metering through the breaker itself.