The Siemens SENTRON 3VA2163-7MN36-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for motor protection, carrying a continuous current Iu of 63 A and a breaking capacity of 330 kA at 240 V. The ETU350M electronic trip unit handles phase-failure detection and adjustable overload curves, so it's suited for protecting motor feeders in industrial panels where high fault current is a risk.
Breaking capacity across voltage levels
The interrupting rating drops as voltage climbs: 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. That 330 kA at 240 V tells you this breaker is built for high-fault installations — think transformer secondaries or large motor branch circuits where available fault current is well above typical distribution gear.
Thermal derating and operating range
Rated 63 A from 40 °C up to 50 °C ambient. At 55 °C it derates to 60.48 A, at 60 °C to 59.22 A, at 65 °C to 57.96 A, and at 70 °C to 56.7 A. If your panel runs hot — say a sealed enclosure near a furnace line — you need to account for that drop. Operating ambient spans -25 °C to 70 °C; storage from -40 °C to 80 °C.
Dimensions and panel fit
At 105 mm wide, 181 mm tall, and 86 mm deep, this breaker fits standard MCCB mounting footprints. The IP40 front protection means it's fine inside a closed panel but not for washdown zones. Auxiliary contacts come as 2 aux switches plus 1 trip alarm switch (HQ version) — enough for remote status indication without an add-on module.