630 A MCCB with 187 kA interrupting — what the ratings mean for your panel
The Siemens SENTRON 3VA2463-5HL32-0KH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current, with a maximum interrupting capacity of 187 kA at 240 V AC and 121 kA at 415/440 V. That 187 kA figure at 240 V means it can safely clear a bolted fault of that magnitude without rupturing — critical for high-fault-capacity service entrances or transformer secondaries where available fault current is well above what a standard 65 kA MCCB could handle. The interrupting curve drops to 75.6 kA at 500 V and 9 kA at 690 V, so verify your system voltage against the table before specifying. This breaker carries a line protection design (not motor protection), meaning the trip curve is fixed for feeder and distribution duty — no adjustable overload class for motor starting inrush. The continuous rating of 630 A at 40 °C derates to 520 A at 70 °C; if your panel ambient runs hot, size the upstream conductor for the derated value, not the nameplate 630 A.
Panel fit — dimensions and mounting
At 138 mm wide, 248 mm tall, and 110 mm deep, this MCCB fits standard SENTRON 3VA switchboard mounting patterns. The 110 mm depth (4.33 in) is a key number for shallow enclosures or gland-plate clearance — measure your cabinet depth before committing, especially if you're retrofitting into an existing panel with a fixed backplate. The 138 mm width (5.43 in) occupies three pole spaces on a standard DIN-rail or busbar system.
Auxiliary and release options — what's built in
Factory-fitted with a shunt trip release (STL) and an auxiliary switch block: 2 auxiliary switches plus 1 trip alarm switch (HQ configuration). The shunt trip allows remote tripping from a PLC or emergency-stop circuit — useful for unattended panels or coordinated shutdown sequences. The trip indicator and voltage trigger are present; undervoltage release is not fitted. No ground-fault monitoring version, no communication function on this variant.