What it is and what the ratings mean for fit
The Siemens SENTRON 3VA2163-5KP32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve simplifies panel design: you size the bus and downstream conductors for a solid 63 A without calculating temperature correction factors. Breaking capacity is the headline selector. This unit delivers 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. For a 480 V panel in North America, the 75.6 kA at 500 V figure is the relevant bound — it tells you this MCCB can safely interrupt a fault up to that level without upstream fuses or a current-limiting reactor, provided the available fault current at the panelboard doesn't exceed it. Rated insulation voltage is 800 V, so the breaker is electrically rated for 690 V line-to-line systems common in European industrial distribution. The line protection design means the thermal-magnetic trip curve is set for cable and busbar protection, not motor overload — pair it with a separate overload relay if feeding a motor directly.
Integration and deployment context
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a 3-pole frame that fits standard Siemens 3VA panelboard and enclosure cutouts. The breaker ships with one auxiliary switch and one trip alarm switch (HP type) factory-installed, so you get remote status and trip indication without a separate accessory order. Communication function is built in, which on the 3VA platform typically means the breaker supports the SENTRON communication module for PROFIBUS or PROFINET — verify the specific communication module order code if you need fieldbus integration. No undervoltage release or ground-fault monitoring is included, so specify those as add-ons if the application requires them.