What this MCCB is and where it fits
The Siemens SENTRON 3VA2163-5HN36-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at up to 70 °C ambient — no derating needed across the full temperature range. It is designed for line protection in distribution panels, meaning it handles feeder and main breaker duty rather than motor branch-circuit protection. The 187 kA interrupting capacity at 240 V AC gives it headroom for high-fault installations, and it still delivers 121 kA at 415 V and 75.6 kA at 500 V. At 690 V the rating drops to 3.7 kA, so it is not a primary choice for 690 V main breakers.
Key ratings and what they mean for your panel
Rated at 63 A from 40 °C all the way to 70 °C — that is a flat thermal curve, so you do not have to derate for elevated ambient temperatures inside a crowded enclosure. The 187 kA SCCR at 240 V means this breaker can safely interrupt a fault current up to that level without welding contacts or venting arc gas into the panel; at 415 V it still handles 121 kA. Three poles cover three-phase line or feeder duty. The unit ships with a shunt trip (STL) release and a complement of auxiliary switches: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ designation). That gives you remote status and trip indication without adding external relay logic.
Integration notes for the panel builder
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That is a standard SENTRON 3VA2 frame footprint — it mounts on a DIN rail or can be screw-fixed to a backplate. The 86 mm depth leaves room for rear-access wiring in a 200 mm deep enclosure. Maximum power loss is 4 W, so heat buildup in a sealed cabinet is minimal. No communication module is fitted; this is a standalone breaker with hardwired auxiliary contacts and shunt trip only.