What the ratings mean for your panel
The Siemens 3VA2063-6HN32-0DL0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C — that's the Iu figure that governs the main bus feed or large downstream feeder it protects. At 240 V it interrupts 242 kA; at 415 V and 440 V that drops to 187 kA, and at 690 V the breaking capacity falls to 4 kA. The ETU350 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, so selectivity studies actually have room to work. Three poles, line-protection version — no ground-fault module built in.
Integration dimensions and auxiliaries
The 3VA2063-6HN32-0DL0 measures 181 mm high, 105 mm wide, and 86 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or panel-mount baseplate. It ships with an auxiliary contact configuration of 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch (HQ), and an integrated undervoltage release (UVR). The supplied basic switch carries order code 3VA2063-6HN32-0AA0; the integrated auxiliary trip module is 3VA9608-0BB25. Maximum power loss is 7.9 W.
Derating and ambient range
At 40 °C, 45 °C, and 50 °C the breaker holds its full 63 A rating. At 55 °C it derates to 60.6375 A, at 60 °C to 58.275 A, at 65 °C to 55.9125 A, and at 70 °C to 53.55 A. Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Rated insulation voltage is 800 V.