The Siemens SENTRON 3VA2163-5HN36-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, sized for line-protection duty in distribution panels. Its interrupting capacity peaks at 187 kA at 240 VAC — that means it can safely clear a fault current up to that level without welding contacts or cascading the arc upstream, which matters when the breaker sits close to a high-capacity transformer. At 415/440 V the rating drops to 121 kA, still well above typical secondary-side fault levels.
Breaking capacity across voltages
The interrupting curve is what you check first when back-feeding a 480 V panel: at 500 V it holds 75.6 kA, and at 690 V it falls to 3.7 kA — that 690 V figure is the weak point, so if your system runs 690 V three-phase, this breaker is not the right choice for high-fault locations. The 63 A rating holds flat from 40 °C up to 70 °C ambient, which simplifies derating in warm enclosures; no need to step down the frame for a 50 °C switchroom.
Mounting and integration
The breaker measures 105 mm wide × 181 mm high × 86 mm deep — a standard MCCB footprint that fits most Siemens SENTRON mounting plates and panel cutouts. It ships with a factory-fitted auxiliary switch block: 2 auxiliary switches plus 1 trip alarm switch (HQ type), so you get remote status indication without adding a separate accessory. No undervoltage release, no ground-fault module, no communication function — this is a straight line-protection device meant for fixed-trip applications where you don't need shunt-trip or remote reset.