What this MCCB is and what it does
The Siemens SENTRON 3VA2063-8JQ46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in industrial power distribution panels. It carries the ETU560 electronic trip unit, which provides adjustable overload and short-circuit protection curves — the 0.5 to 25 s response time range (tr min. 0.5 s, tr max. 25 s) lets you coordinate selectivity downstream without nuisance tripping. Breaking capacity runs from 440 kA at 240 V down to 53 kA at 690 V, so this breaker handles high-fault utility feeds at lower voltages while still clearing faults on 690 V industrial buswork. The 63 A rating holds flat from 40 °C through 70 °C — no derating needed across typical panel ambient temperatures.
Panel fit and mounting
The 3VA2063-8JQ46-0AA0 measures 140 mm wide × 181 mm tall × 86 mm deep. That depth — 86 mm — is the dimension you check against gland-plate clearance and door-swing arc. The IP40 front-face rating means it's protected against solid objects over 1 mm but not sealed against moisture; mount it inside a panel rated for the environment, not exposed.