The Siemens SENTRON 3VA2163-5KP46-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current at 40 °C through 70 °C ambient — no derating needed across that band, which simplifies panel layout in warm enclosures. It uses the ETU850 electronic trip unit, designed for line protection with a communication function onboard, so it can talk to a BMS or SCADA system without an add-on module. Breaking capacity runs 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the 240 V figure covers most North American panelboard applications; the 415 V number handles European 400 V distribution.
IP40 front protection means enclosed panel mounting.