The Siemens SENTRON 3VA2163-5HN36-0HL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a 187 kA interrupting capacity at 240 V and 121 kA at 415 V.
Panel fit and mounting dimensions
That 105 mm width is a standard 3-pole MCCB footprint — it occupies the same panel cutout as other 3VA frame-size breakers, so swapping from a different 3VA variant or an older 3VL series should not require re-drilling the mounting plate.
Thermal derating and ambient limits
Above that, the continuous current derates linearly to 53.55 A at 70 °C. Maximum power loss is 4 W per pole — negligible for enclosure thermal rise calculations.