What this MCCB carries
The Siemens 3VA2163-6HL32-0KL0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection. Rated continuous current Iu is 63 A, with a rated insulation voltage of 800 V. The interrupting capacity hits 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 5 kA at 690 V — so it's built for high-fault panels where the upstream transformer can dump serious energy into a bolted fault. Current rating holds at 63 A up to 50 °C ambient; above that it derates to 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. If the panel runs hot, factor that curve into the load calcs.
Trip unit and auxiliary hardware
The overcurrent release is an ETU320 electronic trip unit — adjustable thermal-magnetic curve, no communication or phase-failure detection on this variant. A shunt trip (STL) is integrated for remote tripping; the auxiliary contact block carries two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ configuration). The supplied basic switch is order code 3VA2163-6HL32-0AA0; the integrated auxiliary trip is 3VA9688-0BL33.
Panel fit and environment
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is three-pole standard for the 3VA2 frame — check the backpanel layout against the existing cutout before committing the gland plate. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 4 W.