What it is and what it does
The Siemens 3VA2463-5HN32-0HL0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current across three poles. It uses an ETU350 electronic trip unit, set for line protection — meaning it clears overloads and short-circuits without a separate ground-fault module. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, and still holds 17 kA at 690 V, so it handles high-fault industrial feeds without cascading upstream. The shunt trip (STL) integrated auxiliary release lets you remotely trip the breaker from a safety circuit or E-stop chain.
Key ratings — what they mean for the panel
The 630 A rated continuous current (Iu) is the maximum the breaker carries without tripping under normal load. At 40 °C ambient it holds that full 630 A; derate to 520 A at 70 °C if the panel runs hot. The 800 V rated insulation voltage (Ui) tells you the breaker is safe for 690 V systems with margin — common in European 400/690 V industrial networks. Power loss is 162 W max at rated current, so factor that into enclosure ventilation if you're packing multiple breakers in a tight cabinet. The auxiliary contact block ships with 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ — that's four signal outputs for remote status (open/closed, tripped, alarm). Use the trip alarm to light a panel beacon or trigger a PLC fault routine. The shunt trip (STL) release is built in, not an add-on; wire it to a 24 VDC or 230 VAC source (check coil rating on the nameplate) for remote opening.
Panel fit and integration
The breaker measures 138 mm wide, 248 mm high, 110 mm deep — a standard 3-pole MCCB footprint for 630 A frame. Mounts on a DIN rail or direct panel via the rear slots. The ETU350 release is adjustable (long-time, short-time, instantaneous, ground-fault if equipped — here it's line protection only, no ground-fault module). The shunt trip release is factory-installed; verify the coil voltage matches your control voltage before wiring.