The Siemens SENTRON 3VA2463-6HN32-0AJ0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 630 A at 40 °C and a breaking capacity of 242 kA at 240 V. That 242 kA rating means it can safely interrupt a fault current that high without the arc escaping or the case rupturing — critical for high-fault installations like transformer secondaries or large motor control centers where available fault current can exceed 100 kA. The ETU350 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, so you're not locked into a fixed thermal-magnetic characteristic.
Breaking capacity across voltage
This MCCB's interrupting rating drops as voltage rises: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V (–). That 40 kA at 690 V is still a serious number — it's not a derated afterthought. If your panel feeds a 690 V drive or a step-up transformer secondary, this breaker handles the fault without upstream coordination headaches.
Thermal derating and panel fit
Rated 630 A at 40 °C ambient, the 3VA2463-6HN32-0AJ0 derates to 520 A at 70 °C (–). That's a 17% drop from 40 °C to 70 °C — plan your enclosure ventilation if you're loading it near the nameplate in a hot cabinet. The dimensions are 248 mm high × 138 mm wide × 110 mm deep (–). That 110 mm depth fits standard MCCB mounting plates and most 800 mm deep enclosures without protruding past the gland plate. The front face carries IP40 protection — fine for a clean panel, but not for washdown areas.
What the ETU350 gives you
The ETU350 electronic trip unit provides adjustable protection parameters: long-time pickup and delay, short-time pickup and delay (with I²t on/off), instantaneous pickup, and ground-fault pickup and delay. Compared to a thermal-magnetic breaker, the ETU350 lets you set the short-time delay to coordinate with downstream breakers without sacrificing the instantaneous trip for high faults. That's useful for selective coordination in a distribution panel where you want the feeder to hold for a downstream fault but clear its own bus fault instantly. The trip indicator confirms the breaker opened on a fault, not manually — helpful for fault diagnosis on a remote or automated line.
Sourcing and ordering
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time. The order code 3VA2463-6HN32-0AJ0 is the full factory configuration — no field-installable auxiliaries or shunt trips to add later, so verify your auxiliary contact count and undervoltage release requirement before you commit the BOM line.