Siemens 3VA2463-6JQ42-0AA0 — 630 A SENTRON MCCB, 4-Pole, Adjustable Trip, High SCCR
The Siemens 3VA2463-6JQ42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, with a 4-pole configuration and an adjustable I²t trip unit covering 945 A to 5 670 A.
The SCCR curve is the deciding factor for fault-current coordination: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V.
Thermal Derating — Continuous Current vs. Ambient Temperature
Per the datasheet, derate linearly: 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. Plan the load at the derated value for the expected enclosure temperature.
Lifecycle and Sourcing — Current Production, Quoted to Order
The lifecycle stage is current production. This is an active catalog line from Siemens SENTRON, not a phase-out or NRND part.
Dimensions and Panel Fit — 110 mm Depth, 184 mm Width, 248 mm Height
The 3VA2463-6JQ42-0AA0 measures 110 mm deep, 184 mm wide, and 248 mm tall. The 184 mm width (7.24 in) is the critical dimension for DIN-rail or mounting-plate spacing — it occupies roughly 7.25 inches of rail width. The 110 mm depth (4.33 in) leaves clearance for rear-access wiring in a standard 600 mm deep enclosure. Verify gland-plate clearance for the line and load conductors at the 630 A rating, which typically requires multiple conductors per phase.
Ground-Fault and Communication — Summation Current Sensing, Communication Function Present
The ground-fault monitoring uses summation current formation on the L + N conductors, meaning it measures vector sum of phase and neutral currents to detect leakage. The communication function is present (yes), which on the 3VA2 platform typically supports PROFIBUS or PROFINET via a communication module — useful for remote trip indication, energy monitoring, and selective coordination in a networked distribution system.
Power Loss and Operating Limits
Maximum power loss is 162 W at rated current — relevant for enclosure thermal calculations, especially when multiple breakers are ganged.