63 A MCCB with ETU850 trip unit — line protection duty
The Siemens 3VA2163-6KP32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current, configured for line protection with the ETU850 electronic trip unit. It carries a 242 kA breaking capacity at 240 V, dropping to 187 kA at 415 V and 440 V, then to 121 kA at 500 V, and 3.8 kA at 690 V. The ETU850 provides adjustable long-time (tr) and short-time (tsd) delay settings — tr adjustable from 0.5 to 25 s, tsd from 0.05 to 0.5 s — giving selectivity coordination flexibility for downstream feeders.
Integration and mounting
Mounts on a DIN rail or panel-mount baseplate — the 105 mm width, 181 mm height, and 86 mm depth fit standard SENTRON 3VA2 panel cutouts. IP40 on the front face suits enclosed panel installation where the breaker is not directly exposed to washdown or dust ingress. Communication function is built in, supporting integration with higher-level monitoring systems without an external module.
Temperature derating and ambient range
Rated continuous current holds at 63 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed in typical panel environments. Operating ambient spans -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power loss is 4 W.