What the ratings mean for fit
The Siemens SENTRON 3VA2063-7HN46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full 40–70 °C ambient range — no derating needed in a warm panel. That 63 A holds steady all the way up to 70 °C, which is unusual; most breakers start pulling back above 40 °C. The ETU350 electronic trip unit gives you adjustable overload and short-circuit protection curves, so you can dial it in for motor or feeder duty without swapping hardware. Insulation voltage is rated 800 V, meaning it's comfortable on 480 V or 600 V class systems with headroom. The interrupting ratings are serious: 330 kA at 240 V, 242 kA at 415 V, and still 187 kA at 500 V — that's enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. At 690 V it drops to 3 kA, so watch your application voltage if you're on a 690 V system.
Panel integration and footprint
The 3VA2063-7HN46-0AA0 measures 86 mm deep by 140 mm wide by 181 mm tall. That 140 mm width across four poles is tight for a 63 A MCCB — it'll fit a 600 mm wide enclosure with room for a disconnect handle and some auxiliary contact blocks alongside. The 86 mm depth means it clears most standard backpan depths without a sub-panel extension. IP40 on the front keeps dust out of the trip unit but isn't rated for washdown; keep it inside a sealed enclosure if there's hose spray nearby.
Compliance and documentation
Being a Siemens SENTRON product, the 3VA2063-7HN46-0AA0 carries the usual compliance suite: UL 489, CSA C22.2 No. 5, IEC 60947-2, and CE marking for European installations. RoHS and REACH declarations are available through Siemens' documentation portal. The ETU350 trip unit is UL-recognized for electronic overcurrent protection. If your QA needs a declaration of conformity or a material compliance cert, it's standard issue with this series.