The Siemens SENTRON 3VA2463-7HN32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 330 kA at 240 VAC. This is a line-protection device, meaning it is designed for main feeder or large distribution applications where high fault current capability is required to maintain selectivity downstream. The 330 kA interrupting rating at 240 V makes this suitable for high-available-fault-current installations such as large industrial switchboards or utility entrance points. At 415 V the rating is 242 kA, and at 690 V it drops to 9 kA — reflecting the physics of arc extinction at higher voltages.
Thermal derating and power dissipation
The continuous current rating is temperature-dependent: 630 A at 40 °C ambient, derating to 520 A at 70 °C. This matters for panel layout — if the breaker is enclosed with other heat sources, the actual ampacity may be lower than the nameplate. Maximum power loss is 162 W, which must be considered in the enclosure thermal budget.
Integrated shunt trip release
This variant includes a shunt trip (STL) auxiliary release, allowing remote tripping via a control voltage. The undervoltage release is not fitted on this order code. If undervoltage protection is required, specify a different variant or add an external relay.
Physical fit and mounting
Dimensions are 248 mm height, 138 mm width, 110 mm depth. The width is the critical dimension for multi-pole grouping in a panel — three poles fit in a 138 mm wide footprint. Depth of 110 mm is standard for this frame size and clears most 200 mm deep enclosures with wiring space to spare.