The Siemens SENTRON 3VA2163-6JP42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for a continuous current of 63 A across the full ambient range from 40 °C up to 70 °C — no derating needed in a warm panel. That flat thermal curve is unusual; most breakers start dropping current above 40 °C. Here it holds 63 A all the way to 70 °C, which simplifies coordination in a sealed enclosure. The interrupting ratings are what you'd expect from a high-capacity SENTRON frame: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.8 kA at 690 V. It carries the ETU550 electronic trip unit, which gives adjustable long-time pickup and delay (tr adjustable from 0.5 to 25 seconds), plus adjustable N-conductor protection (OFF, 40 %, up to 160 %). That N-conductor adjustability matters on 4-pole breakers feeding unbalanced loads or harmonic-rich supplies — you can set the neutral protection to match the actual phase-to-neutral fault current rather than a fixed 100 %.
The SENTRON 3VA series is Siemens' mainline MCCB platform, so spares, accessories, and replacement trip units are widely stocked. If you're replacing an older 3VL or 3VF frame, check the mounting footprint — the 3VA series uses a different base plate pattern, so a retrofit adapter may be needed.
Panel fit and physical integration
The width of 140 mm on a 4-pole frame is typical for this class; verify the mounting centers against your existing busbar or panel layout before ordering.