Breaker selection memo — 63 A motor-protection MCCB
The Siemens SENTRON 3VA2163-7MN36-0AG0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with the ETU350M electronic overcurrent release tuned for motor protection duty. That 63 A holds flat from 40 °C to 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C — the thermal curve matters if this lands in a warm enclosure. Phase failure detection is built in, so it catches a lost leg before the motor single-phases.
Interrupting capacity — what the ratings mean
This MCCB delivers 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. Those are the maximum short-circuit currents it can safely interrupt at each voltage level — critical for coordination studies. The 242 kA at 415 V covers most industrial distribution systems in Europe and Asia; the 690 V figure drops to 52.5 kA, so verify fault levels if you are on a 690 V line.
Panel fit and integration
Dimensions: 86 mm depth, 105 mm width, 181 mm height. IP40 on the front — suitable for enclosed panel mounting, not for open washdown areas. The auxiliary contact version includes one auxiliary switch plus one trip alarm switch (HP type), giving a separate signal for trip vs. manual-off. No undervoltage release, no ground-fault monitoring, no communication module — this is a standalone motor-protection breaker, not a networked power monitor.