What this 630 A MCCB does for your line
The SENTRON 3VA2463-5JQ32-0AE0 is a 3-pole molded case circuit breaker rated 630 A at 40 °C, designed for line protection with a communication function. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V — that's the fault-clearing headroom you need for high-available-fault-current switchboards where a standard MCCB would weld shut. The 110 mm depth and 138 mm width fit standard SENTRON panel cutouts; the 248 mm height clears most enclosure gland plates without a riser.
Thermal derating — the real continuous current
The 630 A rating is at 40 °C ambient. At 50 °C it's 570 A; at 60 °C it's 510 A; at 70 °C it's 450 A. If your panel ambient runs above 40 °C — common in a packed enclosure with drives or transformers — size the breaker for the derated value, not the nameplate. The full-scale setting is 630 A with an initial pickup of 126 A, so the electronic trip unit gives you adjustable long-time and short-time bands.
Interrupting capacity by voltage — where it matters
At 240 V the breaker clears 187 kA symmetrical. At 415 V and 440 V it's 121 kA. At 500 V it drops to 75.6 kA, and at 690 V it's 9 kA. The steep fall-off above 500 V means this is a 480 V class MCCB — don't spec it for a 690 V motor circuit unless the available fault current is under 9 kA. The minimum breaking capacity is 945 A, so it's not for low-fault branch circuits where a miniature breaker would do.
Panel fit and wiring
Mounts in a standard SENTRON MCCB footprint — 138 mm wide, 110 mm deep, 248 mm tall. The 3-pole design with no undervoltage release means you need an external shunt trip if remote tripping is required. Four HQ auxiliary switches are built in, so you get status feedback without an add-on module. No trip indicator and no voltage trigger; the electronic trip communicates via the integrated comms function.