630 A MCCB with adjustable trip and high interrupting capacity
The SENTRON 3VA2463-6HL32-0KH0 is a 3-pole molded case circuit breaker rated for 630 A continuous at 40 °C, designed for line protection in distribution panels. Its adjustable thermal-magnetic trip unit covers a range from 945 A to 5670 A, giving you flexibility to match the cable or busbar rating without swapping the breaker frame. Breaking capacity is 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. That 242 kA figure at 240 V means this breaker can safely interrupt a fault current up to 242,000 A at that voltage level — critical for high-fault locations like transformer secondaries or large motor control centers where available fault current is substantial. The breaker carries a shunt trip release (STL) for remote tripping, plus two auxiliary switches and one trip alarm switch (HQ configuration). The trip indicator and voltage trigger are present; undervoltage release is not fitted. Communication function is not included — this is a standalone protective device, not a networked power meter.
Thermal derating and power loss
The 630 A rating holds at 40 °C ambient. Above that, derate 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 your panel ambient runs 50 °C, you're limited to 593 A continuous — plan the load accordingly. Maximum power loss is 162 W at rated current. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage minimum of -40 °C is the handling limit, not the running condition — the breaker can sit in a cold warehouse but must be above -25 °C to carry load.
Physical fit and panel integration
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. The 110 mm depth (4.33 in) is the body depth behind the panel face — verify your enclosure depth clearance, especially if a rear-mounted bus or cable duct is present. Width of 138 mm (5.43 in) is the standard 3-pole MCCB footprint for this SENTRON frame size. The basic switch assembly is order code 3VA2463-6HL32-0AA0. The breaker mounts via the SENTRON 3VA family's standard DIN-rail or screw-mount pattern — no special adapter required for most distribution panels.