What the ratings mean for fit
The 3VA2163-5JQ32-0JC0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C across the full ambient range up to 70 °C — no derating needed in a warm enclosure. The 3-pole design handles three-phase line protection, and the adjustable thermal-magnetic trip can be set between 95 A and 756 A (the full-scale value is 63 A, so the 95–756 A range likely refers to the magnetic short-circuit pickup). The 187 kA breaking capacity at 240 V drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 3.7 kA at 690 V — the SCCR headroom shrinks fast above 500 V, so verify the available fault current at your system voltage before committing the BOM line. This breaker includes a shunt trip (STL) and two auxiliary switches HQ, plus communication capability — it can report status and accept a remote trip signal, which matters for coordinated shutdown sequences or remote monitoring in a panel.
Panel integration and dimensions
At 86 mm deep, 105 mm wide, and 181 mm tall, this MCCB fits standard panel-mount cutouts for SENTRON 3VA frames. The 3-pole footprint is compact enough for multi-breaker lineups in a distribution board. Power loss is 4 W maximum — negligible for thermal budgeting in a sealed enclosure.