630 A MCCB for Line Protection — Breaking Capacity Across the Voltage Curve
The Siemens 3VA2463-6HN32-0CL0 is a SENTRON 3VA2 molded case circuit breaker rated for 630 A continuous at 40 °C, with a 3-pole line-protection design. Its breaking capacity drops from 242 kA at 240 V to 187 kA at 415 V and 440 V, then to 121 kA at 500 V, and 9 kA at 690 V — so the voltage class of your distribution system determines which fault level this breaker can safely interrupt. The 630 A frame is the headline number, but the real fit question is whether the available fault current at your service voltage stays under the curve.
Auxiliary Switch Complement and Undervoltage Release
This MCCB ships with a built-in undervoltage release (UVR) and a full auxiliary switch deck: 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ. The UVR ensures the breaker drops out on loss of control voltage — standard practice for safety circuits where a voltage dip must open the main contacts. The HQ designation on the alarm switch means it provides a separate signal path for remote indication, not just a shared common. Panel builders should account for the wiring terminations of all five switches in the enclosure layout.
Active Production — Current Lifecycle Status
The 3VA2463-6HN32-0CL0 carries a lifecycle stage of 'current', meaning Siemens continues to manufacture and support this order code as an active catalog item. No last-time-buy or phase-out notice applies. For BOM-freeze planning, this part is a standard-line item with no imminent replacement pressure.
Physical Fit and Panel Integration
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep. The 138 mm width is the standard 3-pole MCCB footprint for this frame size.
Thermal Derating — Current vs. Ambient Temperature
The 630 A rating holds at 40 °C. Above that, the continuous current derates linearly: 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 the panel ambient runs hot — say, near a drive cabinet or in a non-conditioned electrical room — the actual load capability drops by roughly 3 A per degree above 40 °C. The maximum operating ambient is 70 °C; storage range is -40 °C to 80 °C.