630 A MCCB with 187 kA interrupting capacity — selectivity headroom for high-fault panels
The Siemens 3VA2463-5JP32-0BL0 is a SENTRON molded case circuit breaker rated for 630 A continuous at 40 °C, with an interrupting capacity of 187 kA at 240 V AC. That interrupting figure drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 9 kA at 690 V — the part is sized for 480 V-class distribution where fault currents can exceed 100 kA. The 630 A frame carries a thermal derating curve: 600 A at 45 °C, 570 A at 50 °C, stepping down to 450 A at 70 °C. For a panel OEM, that means the breaker can serve a 600 A bus at 45 °C without upsizing the frame, but above that ambient the ampacity drops linearly.
At 138 mm wide, 248 mm tall, and 110 mm deep, the 3VA2463-5JP32-0BL0 fits standard MCCB panel cutouts. The depth of 110 mm (4.33 in) is the dimension that matters for gland-plate clearance and door swing — verify the enclosure depth against that figure before laying out the back panel. The width of 138 mm (5.43 in) matches the SENTRON 3VA2 frame footprint; if replacing an older 3VF or 3VL breaker, check the mounting hole pattern against the existing bus bars. The breaker ships with a basic switch (3VA2463-5JP32-0AA0) as the supplied switching element. The UVR is factory-installed; verify the control voltage matches the panel's auxiliary supply before wiring.