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.
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.
Rated 630 A at 40 °C ambient, the 3VA2463-6HN32-0AJ0 derates to 520 A at 70 °C (–). That 110 mm depth fits standard MCCB mounting plates and most 800 mm deep enclosures without protruding past the gland plate.
What the ETU350 gives you
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
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.