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. Its interrupting capacity reaches 242 kA at 240 V and 187 kA at 415 V, making it suitable for high-fault-current main feeders or large sub-distribution boards where selectivity and SCCR headroom are critical.
Interrupting Capacity and SCCR Curve — What the Ratings Mean for Panel Coordination
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. At 690 V the rating drops sharply — this breaker is not intended for 690 V main feeders unless the available fault current is under 9 kA. For a 480 V panel with a transformer rating that yields 100 kA available, the 121 kA at 500 V provides comfortable margin.
Thermal Derating — Continuous Current vs. Ambient Temperature
The 630 A rating holds at 40 °C ambient. 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. If the panel internal ambient runs above 40 °C — typical in a packed enclosure with multiple breakers — the actual continuous current the breaker can carry without nuisance tripping is lower than the nameplate. 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. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
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. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The rated insulation voltage is 800 V, which covers 480 V and 600 V class systems with margin.