The Siemens SENTRON 3VA2163-6HN32-0CL0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full -25 °C to 70 °C operating range — no derating needed up to the top of the enclosure temperature spec. Breaking capacity hits 242 kA at 240 V, 187 kA at 415/440 V, and 121 kA at 500 V, then drops to 3.7 kA at 690 V. That 242 kA at 240 V means it can sit on a transformer secondary or a high-fault industrial service entrance without cascading upstream breakers — a real line-down saver if you're swapping into an existing high-AIC panel.
What the ratings mean for fit
The 63 A frame holds its rating flat from 40 °C through 70 °C ambient — no thermal derating curve to chase. That's unusual for a compact MCCB; most competitors start knocking current back above 50 °C. The 3-pole body (105 mm wide, 181 mm tall, 86 mm deep) fits standard Siemens SENTRON panel cutouts. The integrated undervoltage release (UVR) and the auxiliary switch complement — 2 aux + 1 trip alarm + 1 electrical alarm — mean you don't need to add separate accessory blocks for status feedback or safety dropouts. It's designed for line protection, not motor protection: no adjustable thermal-magnetic trip, no ground-fault module. If you need motor-circuit protection, look at the 3VA2 motor-protective variant instead.
Panel integration notes
Mounts on a standard DIN rail or via the rear screw-mount pattern. The 86 mm depth means it clears most 200 mm-deep enclosures with room for wiring gutters. Spring-cage terminals on the line and load side accept 35 mm² Cu cable. The UVR coil draws power from the line side; no separate control supply needed. The auxiliary switch wiring exits on the left side — keep that clear when planning wireway fill.