The Siemens SENTRON 3VA2163-5HL32-0AD0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C through 70 °C — no derating needed up to that ceiling. That thermal stability matters when the breaker lives in a crowded enclosure next to drives or transformers that push internal panel temperature above 50 °C. Breaking capacity is 187 kA at 240 V and 121 kA at 415 V or 440 V, dropping to 75.6 kA at 500 V and 3.7 kA at 690 V. At 240 V that SCCR handles most North American transformer-fed fault levels without requiring a current-limiting upstream device; at 415 V it covers the standard European distribution fault level for a 63 A feed. The maximum power loss is 4 W — low enough that ventilation slots in a standard steel enclosure are sufficient; no forced cooling required.
Physical fit and auxiliary complement
Dimensions are 86 mm depth, 105 mm width, 181 mm height. This variant ships with three auxiliary switches HQ (high-availability quick-action) factory-fitted. If you need shunt trip or UVR, those are field-addable accessories for the 3VA2 frame — the basic switch interface is the 3VA21635HL320AA0 sub-assembly.
The storage low end covers cold warehouse transit; the operating high end matches the 63 A continuous rating at 70 °C without derating.
What the 63 A rating means in practice
That simplifies panel design: if the breaker is in a 65 °C switchgear cubicle, it still carries 63 A. The minimum breaking capacity is 95 A, so the breaker is sized for branch circuits where the load current is at least 95 A to guarantee the magnetic trip operates within its calibrated band.