What this MCCB delivers on the line
The Siemens SENTRON 3VA2163-5JQ32-0JH0 is a 3-pole molded case circuit breaker rated for 63 A continuous, with no derating needed from 40 °C up through 70 °C ambient — the full 63 A holds across that entire thermal band, which simplifies panel design in warm enclosures or near other heat sources. Its interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — numbers that put it in the high-fault tier for a 63 A frame, meaning it can sit ahead of a transformer or at a service entrance where available fault current is severe, without needing a current-limiting fuse upstream. The adjustable thermal-magnetic trip range runs from a 16 A minimum to the 63 A full-scale value, with a voltage-trigger function built in and a visible trip indicator on the front — no guessing whether it's open or tripped during troubleshooting.
Panel fit and environmental limits
The 3VA2163-5JQ32-0JH0 measures 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without crowding adjacent breakers. The 86 mm depth leaves room for rear bus connections or a wiring trough behind the panel. Operating ambient range is -25 °C to 70 °C, storage from -40 °C to 80 °C, and maximum power loss is 4 W — negligible heat contribution in a ventilated enclosure, but worth noting if you're packing breakers tightly in a sealed cabinet.