The Siemens 3VA2163-8HL42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its 4-pole design and ETU320 electronic trip unit make it a line-protection breaker for distribution panels where selectivity and coordination matter. Breaking capacity is 330 kA at 415 V, 330 kA at 440 V, and 220 kA at 500 V — figures that put it in the high-interrupting class for industrial mains. At 690 V it still holds 52.5 kA, so it handles fault currents on 400 V class systems without cascading upstream. The ETU320 is an electronic overcurrent release with adjustable pickup and time-delay settings, giving the panel designer selective coordination headroom against downstream breakers.
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard 4-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 3.1 W — negligible for thermal budgeting inside a crowded panel.