63 A MCCB with undervoltage release and high interrupting capacity
The Siemens 3VA2163-5HN32-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across its full ambient temperature range from 40 °C to 70 °C — no derating needed up to 70 °C, which simplifies panel design in warm enclosures. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the 240 V figure covers most North American distribution panels, while the 415 V rating handles European 400 V line-to-line faults cleanly.
Integration and dimensions
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — the 105 mm width fits standard MCCB panel cutouts, and the 86 mm depth leaves room for rear bus connections in a typical distribution enclosure. Rated for line protection (not motor protection), so it is sized for feeder or branch-circuit overcurrent protection rather than overload-only duty on a motor starter.