ABB S281-K25, DIN Rail Mount Circuit Breaker, 25 A K-curve, current production.
| Parameter | Value |
|---|---|
| Weight | 0.06 kgs |
The S281-K25: The K-curve trips magnetically between 8 and 12 times rated current (In), which suits inductive loads such as motors, transformers, and solenoid valves where the inrush peak is higher than a resistive load but still needs fast fault clearing.
The S281-K25 is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.
Both are ABB DIN-rail MCBs with the same 18 mm width and 35 mm rail mount, so the S281-K25 will physically fit the same enclosure slot. The key difference is the trip curve — SH201T-C16 is a C-curve (5–10× In) while the S281-K25 is a K-curve (8–12× In). Verify the downstream load's inrush profile before swapping; a K-curve is better suited for inductive loads, but if the original design relied on the C-curve's lower magnetic threshold for coordination, the change may affect selectivity.