Footprint and panel fit — 70 mm deep, 101.6 mm wide
The 3VA1150-5GD42-0AA0: The breaker occupies 130 mm tall by 101.6 mm wide by 70 mm deep — roughly 4 by 5.12 by 2.76 inches. That 70 mm depth is shallow enough for most 200 mm deep enclosures with gland plate clearance. IP40 on the front means it's protected against tools and wires >1 mm, but not against water ingress — keep it inside a rated enclosure. Four poles in that width means the neutral pole shares the same 50 A rating; no derating needed on the neutral path.
Active lifecycle — BOM-secure for new builds
The lifecycle stage is marked as current — no phase-out or NRND flags. For a panel OEM locking in a BOM, this means the 3VA1150-5GD42-0AA0 is available through normal Siemens distribution channels. No successor part has been announced. If you're replacing an older 5SQ2670-2YA63 or similar frame, check the footprint and trip curve compatibility; the 3VA series uses a different mounting footprint than the older 3VF or 5SQ frames, so a DIN-rail adapter or drill pattern change may be needed.