630 A continuous, 242 kA at 415 V — the SCCR headroom this breaker carries
The Siemens 3VA2463-7HN32-0JL0 is a SENTRON molded case circuit breaker rated for 630 A continuous at 40 °C, with a 3-pole configuration and a breaking capacity of 242 kA at 415 V AC. That 242 kA at 415 V tells you this breaker handles high-fault utility or transformer-fed service entrances — the kind of installation where a standard 65 kA MCCB would need a current-limiting upstream fuse to coordinate. At 240 V it holds 330 kA, at 500 V still 187 kA, and drops to 9 kA at 690 V, which is typical for a 630 A frame sized for low-voltage distribution, not 690 V motor circuits.
Thermal derating and power loss — what the panel builder needs to budget
Continuous current derates linearly from 630 A at 40 °C down to 520 A at 70 °C, so if this breaker lives in a hot panel (say, 55 °C ambient), you're limited to 575 A continuous. Maximum power loss is 162 W — that's the heat the enclosure must vent. The 110 mm depth x 138 mm width x 248 mm height footprint fits standard SENTRON 3VA2 panel cutouts; the 3-pole block occupies roughly the same DIN-rail space as a 630 A frame from the same family.
Auxiliary switches, shunt trip, and the base switch variant
This order code includes a factory-fitted shunt trip release (STL) and a full auxiliary switch block: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ configuration). The supplied basic switch is 3VA2463-7HN32-0AA0 — the same 630 A, 3-pole thermal-magnetic or electronic-trip base, without the accessories. If your BOM already carries the base switch and you need the shunt trip and alarm contacts, this -0JL0 variant saves field wiring time versus adding those as kit.