What it is — and what the ratings mean for your panel
The Siemens 3VA2163-5JP32-0HC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That 63 A holds at every temperature step in the table, so you size the feeder for a solid 63 A without thermal headroom padding. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those numbers mean it can safely interrupt fault currents up to those levels without welding contacts or cascading upstream — critical for high-fault panels close to the transformer. It is designed for line protection (feeder duty) and carries a shunt trip release (STL) plus two HQ auxiliary switches, so you get remote trip capability and status feedback without adding external relays. Communication function is built in — this variant talks to the control system for metering and trip-event reporting.
Mounting and integration — DIN rail or direct panel
Footprint is 105 mm wide, 181 mm tall, 86 mm deep — fits standard SENTRON MCCB cutouts. The supplied basic switch is 3VA21635JP320AA0; the breaker ships as a complete unit with the shunt trip and aux switches pre-installed. No field wiring of the trip coil unless you need a different voltage. Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Power loss is 4 W maximum — negligible for thermal budgeting inside a sealed enclosure, but worth noting if you pack multiple breakers in a small gland plate.