63 A MCCB with ETU560 — what the ratings mean for panel fit
The Siemens SENTRON 3VA2063-7JQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel schedules in warm enclosures. The ETU560 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, so this breaker handles both feeder and main switchboard duty without swapping trip packs. Breaking capacity is the headline number for fault coordination: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. At 415 V — the common industrial distribution voltage — 242 kA means this breaker can be installed upstream of most downstream devices without a current-limiting fuse ahead of it, provided the available fault current at the panelboard doesn't exceed that figure. The 86 mm depth and 105 mm width let it drop into standard Siemens 3VA switchboard mountings and most common MCC bucket footprints. Front IP40 protection means it's suited for indoor panel installation where tools or fingers might contact the front face but not for washdown zones.
Panel integration and wiring notes
At 181 mm height, 105 mm width, and 86 mm depth, the breaker fits standard 3VA mounting plates and withdrawable cradle options. The 3-pole form factor with line and load lugs accepts copper or aluminum conductors per the terminal range in the full datasheet. Ground-fault monitoring is configured for summation current formation on the L-conductor — verify the neutral CT placement if using 4-wire systems. Rated insulation voltage is 800 V, so the breaker is rated for 690 V phase-to-phase systems with margin. Maximum power loss is 3 W — negligible for panel thermal calculations but worth noting if multiple breakers are ganged in a sealed enclosure without forced ventilation. The ETU560 trip unit supports communication function, enabling integration with energy management systems or remote monitoring via the SENTRON communication modules. No undervoltage release is fitted as standard, and no voltage trigger is present — these are optional accessories if needed for your safety circuit design.
Environmental and storage limits
Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The storage range exceeds the operating range — that limit governs handling and warehousing, not running conditions. The 63 A rating holds across the full operating band without derating, as shown in the spec table.