63 A MCCB with ETU350M — what the ratings mean for fit
The Siemens 3VA2163-7MN36-0AA0 is a SENTRON 3VA molded case circuit breaker in the motor protection version, carrying a continuous current rating Iu of 63 A that holds flat from 40 °C through 70 °C — no derating needed across typical panel ambient temperatures. The ETU350M electronic trip unit provides adjustable overload and short-circuit protection curves, with phase failure detection built in — a spec that matters for motor feeders where a lost phase can single-phase the load before the thermal overload relay catches it. Interrupting capacity is the headline number here: 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V, then a steep drop to 3.7 kA at 690 V. That means this breaker handles high available fault current on 240–500 V systems without cascading upstream — the 690 V figure is low enough that you need to verify coordination if the service voltage is above 500 V.
Panel fit and mounting
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — a 3-pole frame that fits standard MCCB panel cutouts. The front face carries an IP40 protection class, meaning it's protected against tools and wires >1 mm but not against water ingress; keep it inside a rated enclosure. Rated insulation voltage Ui is 800 V. Maximum power loss is 4 W.