The Siemens SENTRON 3VA2463-5JQ32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a 630 A full-scale value and a maximum short-time withstand current (Icw) of 5,670 A. The interrupting capacity (Icu) hits 187 kA at 240 VAC, drops to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 9 kA at 690 V — so the voltage class of your distribution system drives which fault level this breaker can clear.
Current derating and thermal limits
The continuous current rating is 630 A at 40 °C ambient, but it derates linearly as the panel temperature rises: 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. If your enclosure runs hot — say, a packed MCC lineup near a furnace line — size the breaker for the actual ambient, not the 40 °C nameplate. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 162 W, which matters for ventilation planning in a sealed cabinet.
Built-in auxiliaries and releases
This variant ships with a shunt trip release (STL) for remote tripping and a complement of auxiliary switches: two auxiliary switches, one trip alarm switch, and one electrical alarm switch HQ. That's enough for status feedback to a PLC or to drive a remote indication panel without adding external relay logic. The base unit is the 3VA2463-5JQ32-0AA0, so the switch deck is field-replaceable if the aux configuration needs to change later.
Physical fit and panel integration
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard 3-pole MCCB footprint for a 630 A frame. It mounts on a DIN rail or directly to a backplate; the 110 mm depth leaves clearance for rear-connected busbars in a typical switchboard. If you're swapping into an existing panel that was laid out for a different 630 A MCCB, check the busbar centers and the lug position — the 138 mm width is common but not universal.