Breaking capacity is 10 kA at 277 VAC, sufficient for branch-circuit fault interruption in 277/480 V systems. DIN rail mount, standard modular width for panel integration.
Trip Curve K — what it means on the line
Curve K is a specialty magnetic trip — typically 8–12× In. That means the S201PR-K16 holds steady through moderate inrush (common with motor starters, solenoid valves, or transformer primaries) but trips fast on a hard short. Not a general-purpose curve; it sits between B (low inrush) and C (general motor/lighting) in the ABB S200 family. If your BOM calls for a K-curve, the 16 A rating and 10 kA SCCR match the spec.