Integrator's first look
The Siemens SENTRON 3VA2163-7MN32-0AB0 is a 3-pole molded case circuit breaker rated for a full 63 A continuously from 40 °C through 70 °C — no derating curve to chase across the operating band. That flat thermal profile matters when the breaker shares a crowded enclosure with other heat sources. Interrupting capacity hits 330 kA at 240 V, stepping down to 242 kA at 415 V and 440 V, then 187 kA at 500 V. Designed specifically for motor protection, it includes phase failure detection as a built-in function — no add-on module required. The 2 auxiliary switches (HP type) provide status feedback for the PLC or HMI without occupying extra panel space.
Power loss is capped at 4 W maximum, which keeps internal cabinet temperature rise manageable even in sealed enclosures.
Coordination and selectivity notes
The 3VA2163-7MN32-0AB0 ships without undervoltage release, ground-fault monitoring, or communication function — it is a straight thermal-magnetic motor protection breaker. The trip indicator is also absent, so fault indication relies on the auxiliary switch feedback or a separate indicating light. Short-time delay settings are available: minimum 4 s, maximum 17 s, allowing selective coordination with downstream branch breakers on motor starting inrush. The base switch variant is 3VA2163-7MN32-0AA0; this order code adds the 2 HP auxiliary switches.