What it is and what it does
The Siemens SENTRON 3VA2463-7HN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 630 A at 40 °C. That 630 A figure is the thermal rating at the panel's ambient — derate it per the curve: at 50 °C it's 593 A, at 60 °C it's 557 A, and at 70 °C it's 520 A. The overcurrent release is an ETU350 electronic trip unit, which gives you adjustable long-time, short-time, and instantaneous pickup settings — not a fixed thermal-magnetic curve. Breaking capacity hits 330 kA at 240 V and stays at 242 kA at 415 V and 440 V, then drops to 187 kA at 500 V and 52.5 kA at 690 V. That's enough for high-fault utility feeds or transformer secondaries without cascading upstream.
Deployment and integration
This MCCB is a panel-mount device — it bolts into a switchboard or distribution panel, not a DIN rail. The 3-pole footprint measures 138 mm wide by 248 mm tall by 110 mm deep, so check your panel's cutout and bus-bar spacing before committing. It ships with a shunt trip (STL) for remote opening and comes with 2 auxiliary switches plus 1 trip alarm switch (HQ) — those are wired to the control circuit for status feedback to a PLC or annunciator. The integrated auxiliary trip module is order code 3VA9688-0BL30; the supplied basic switch is 3VA2463-7HN32-0AA0. No communication function, no undervoltage release, no ground-fault monitoring — this is a bare line-protection breaker with a shunt trip, not a smart unit.