630 A MCCB with ETU350 — what the ratings mean for fit
The Siemens SENTRON 3VA2463-7HN32-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated at 630 A at 40 °C, with a continuous current derating curve down to 520 A at 70 °C — so the actual thermal limit depends on your enclosure ambient, not just the nameplate. It carries the ETU350 electronic overcurrent release, which gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves; this is the line protection variant, meaning it's optimized for feeder and main breaker duty rather than motor branch circuit protection. Breaking capacity spans 330 kA at 240 V down to 9 kA at 690 V — at 415/440 V it still holds 242 kA, which covers most industrial distribution panels with high fault current potential. Rated insulation voltage is 800 V, so it's suitable for 690 V systems with margin. Three auxiliary switches (HQ type) are built in, giving you status feedback for the open/closed/tripped positions without needing add-on modules. Power loss at rated current is 162 W — factor that into your panel thermal budget.
Panel integration notes
Dimensions are 248 mm height, 138 mm width, 110 mm depth — a standard SENTRON 3VA frame size that mounts on a DIN rail or directly to a backplate via the supplied mounting brackets. The 3-pole footprint leaves room for side-mounted accessories like rotary handles or shunt trips, though this variant ships without undervoltage release or communication module. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C — suitable for unheated electrical rooms or outdoor enclosures in moderate climates.