630 A MCCB with 242 kA interrupting capacity at 240 V
The Siemens SENTRON 3VA2463-6HN32-0BC0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 242 kA at 240 V AC. That interrupting rating drops to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V — so the voltage at the fault point determines whether this breaker clears a high-energy arc or needs upstream coordination. The 630 A frame is derated across temperature: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. If your panel ambient runs above 40 °C, use the derated value for the continuous load, not the 630 A nameplate.
Line protection with undervoltage release
This MCCB is designed for line protection — feeder or main breaker duty, not motor branch-circuit protection. It ships with an undervoltage release (UVR) installed and two HQ auxiliary switches for status feedback to a PLC or annunciator panel. The supplied basic switch is order code 3VA2463-6HN32-0AA0, which is the core switching mechanism this assembly builds on. No ground-fault monitoring, no communication module, no voltage-trip trigger — it's a straight thermal-magnetic or electronic-trip breaker with undervoltage dropout for safety circuits.