630 A MCCB with ETU560 — what the ratings mean for your panel
The Siemens 3VA2463-5JQ32-0AF0 is a 3-pole SENTRON molded case circuit breaker rated for 630 A continuous current at 40 °C, with an ETU560 electronic trip unit for line protection. The 187 kA breaking capacity at 240 V means it can safely interrupt fault currents up to that level without upstream damage — essential for high-fault utility feeds. At 415 V and 440 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 17 kA at 690 V, so the SCCR headroom is substantial for most industrial distribution boards. Thermal derating is built into the rating table: at 45 °C it carries 600 A, at 50 °C 570 A, at 55 °C 540 A, at 60 °C 510 A, at 65 °C 480 A, and at 70 °C 450 A. If your panel ambient runs above 40 °C, use the row that matches your enclosure internal temperature — do not size by the 40 °C number alone. This MCCB mounts on a DIN rail or directly on a mounting plate in a standard enclosure. The 110 mm depth, 138 mm width, and 248 mm height fit typical 600 mm deep switchboards; verify gland-plate clearance for the 162 W maximum power loss if the breaker is enclosed with other heat sources.
Lifecycle and sourcing — active, quoted to order
The integrated auxiliary release is order code 3VA9608-0BB11, and the supplied basic switch is 3VA2463-5JQ32-0AA0 — these are the internal subcomponents, not field-replaceable spares. For external auxiliary contacts, the breaker ships with 1 auxiliary switch + 1 trip alarm switch HQ.
Integration notes — communication, ground fault, and trip unit
The ETU560 trip unit includes a communication function for integration with plant monitoring systems — no separate module needed for basic data. Ground fault monitoring uses summation current formation on the L-conductor, which detects leakage without a separate core-balance CT. Mechanical endurance is rated at 15 000 cycles. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The trip indicator gives a local visual flag after a fault trip — useful for troubleshooting without opening the panel.