630 A MCCB with ETU550 — what the ratings mean for a panel build
The Siemens SENTRON 3VA2463-5JP32-0HH0 is a 3-pole molded case circuit breaker rated for line protection at 630 A continuous (Iu) at 40 °C, with an insulation voltage of 800 V. The ETU550 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves — it's the trip unit that makes this breaker suitable for selective coordination in a distribution panel, not just a simple thermal-magnetic. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, and still holds 75.6 kA at 500 V — that's enough SCCR to sit upstream of most motor control centers without needing a current-limiting fuse ahead of it. The shunt trip (STL) release is built in, and the auxiliary contact block provides 2 aux switches plus 1 dedicated trip-alarm switch (HQ type) — so you get both a status feedback and a separate fault-signal contact without adding an external module. Max power loss runs 162 W at rated load, which drives ventilation planning if the breaker is enclosed in a low-profile panel.
Current production — no end-of-life watch needed
This order code carries a current lifecycle status from Siemens. No phase-out notice, no last-time-buy deadline to track. For a BOM line that needs a 630 A MCCB with electronic trip and shunt trip, this is a stable spec — you aren't chasing a disappearing part.
Mounting and integration into a 3-pole MCCB footprint
The breaker measures 138 mm wide × 248 mm high × 110 mm deep — the 110 mm depth is the dimension that matters when you're fitting it into a shallow wall-mount enclosure or a panel with a back-panel gland plate. It's a standard SENTRON 3VA2 frame size, so the mounting hole pattern and bus-bar connection centers match the rest of the 3VA2 family. No rewiring if you're swapping from another 3VA2 frame breaker of the same pole count; the line and load lugs land in the same positions.
Derating and operating range — plan for the ambient
The 630 A rating is at 40 °C ambient. At 50 °C it carries 570 A, at 60 °C it's 510 A, and at 70 °C it's 450 A — so if your panel ambient runs hot, size the breaker for the derated current, not the nameplate. Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.