What this 630 A MCCB is for
The Siemens SENTRON 3VA2463-7KQ42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 630 A at 40 °C, designed for line protection in main distribution panels. Its 330 kA interrupting capacity at 240 V (242 kA at 415 V, 187 kA at 500 V, 9 kA at 690 V) means it can clear fault currents up to those levels without upstream coordination loss — critical for high-fault installations like transformer secondaries or large motor control centers. The ETU860 electronic trip unit provides adjustable protection curves and communication capability, letting you integrate breaker status into a BMS or SCADA system. Ground-fault monitoring via summation current formation on L+N is onboard.
Thermal derating — the real ampacity
The 630 A rating holds at 40 °C ambient. At 45 °C it's 600 A; at 50 °C, 570 A; at 55 °C, 540 A; at 60 °C, 510 A; at 65 °C, 480 A; at 70 °C, 450 A. If your panel ambient runs hot — say 50 °C in a sealed enclosure — this breaker still delivers 570 A continuous without nuisance tripping. The rated insulation voltage is 800 V (Ui), and maximum power loss at rated current is 162 W, which factors into enclosure cooling calculations.
Lifecycle and sourcing posture
This order code carries a current lifecycle status — no EOL notice or phase-out date on record. It is sourced through independent distribution and quoted to order against an RFQ; availability and current pricing are confirmed at quote time. For volume buys or BOM-freeze projects, an RFQ locks the allocation.
Panel fit and integration
Dimensions: 184 mm wide × 248 mm high × 110 mm deep (7.24 × 9.76 × 4.33 in). Front face carries IP40 protection; the rear and sides are unrated for enclosure mounting. The 4-pole form factor requires a 4-module wide cutout in the switchboard. Optional motor drive allows remote open/close. Communication function is built into the ETU860 — no separate module needed for basic status reporting.