The Siemens SENTRON 3VA2163-7MS36-0CA0 is a 3-pole molded case circuit breaker rated for 63 A continuous at 40 °C through 70 °C — no derating needed across that band, which simplifies panel sizing in warm enclosures. Its interrupting capacity hits 330 kA at 240 V, 242 kA at 415 V, and still holds 187 kA at 500 V, dropping to 3.7 kA at 690 V.
Undervoltage release and protection design
That means the breaker trips automatically when supply voltage drops below a threshold, protecting downstream loads from brownout conditions or preventing automatic reclosure after a dip. The design is starter protection, so it's intended for motor branch circuits where loss-of-voltage protection is part of the safety sequence. No auxiliary switch, no ground-fault monitoring, no communication function on this order code.
Maximum power loss is 6.5 W, manageable in a typical IP54 steel enclosure without forced ventilation. No trip indicator, no voltage trigger, no phase failure detection on this variant.