63 A MCCB with ETU850 — line protection with communication
The Siemens SENTRON 3VA2163-8KP36-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current, designed for line protection in distribution panels. The interrupting ratings cover the common fault-current levels: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That gives selectivity headroom for most low-voltage distribution scenarios — the 52.5 kA at 690 V is the limiting case for high-voltage industrial grids.
Rated current holds at 63 A across the full ambient range from 40 °C to 70 °C — no derating needed for elevated panel temperatures. The frame measures 105 mm wide by 181 mm tall by 86 mm deep, fitting standard MCCB mounting footprints in switchboards. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power loss is 3.1 W, so ventilation requirements are minimal.