63 A MCCB with ETU560 — 187 kA at 240 V
The Siemens SENTRON 3VA2063-5JQ32-0AF0 is a 3-pole molded case circuit breaker rated for 63 A continuous current (Iu) with an electronic trip unit ETU560. Its breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. That 187 kA figure at 240 V means it can interrupt a fault current nearly three times the typical utility service capacity — sized for high-fault panels in industrial or data-center distribution. Rated insulation voltage is 800 V, and the breaker carries a front IP40 protection class — suitable for enclosed panel mounting where the front face is accessible but the interior is behind a door. The ETU560 trip unit provides adjustable long-time, short-time, instantaneous, and ground-fault protection (summation current formation on L-conductor).
Thermal derating and operating limits
The breaker holds full 63 A rating from 40 °C through 50 °C ambient. Above that it derates linearly: 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. Operating range is -25 °C to 70 °C; storage range -40 °C to 80 °C. Max power loss is 5.4 W.
Dimensions and auxiliary contacts
Dimensions: 105 mm wide, 181 mm high, 86 mm deep — fits standard SENTRON 3VA2063 panel cutouts and busbar arrangements. Comes with one auxiliary switch and one trip alarm switch (HQ version) factory-fitted. No undervoltage release or voltage trigger; no phase failure detection. Communication function is present (likely via the ETU560's optional communication module, not integrated into the base breaker).