ABB S203-K25, 3-pole miniature circuit breaker, 25 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN-rail mount.
| Parameter | Value |
|---|---|
| Amps | 25 |
| Type | Trip Curve K |
| Poles | 3 |
| Mounting | DIN Rail |
| Volts AC | 277 |
| Breaking capacity | 10 kA |
Curve K (10–14x In) gives it a higher magnetic trip threshold than B or C curves, making it suited for loads with moderate inrush like motor starters or transformer primaries where you need to ride through the start-up spike without nuisance tripping.
Submit an RFQ — this part is quoted to order through independent distribution, with pricing and availability confirmed at quote time.
Within the same ABB S200 series, the S203-C25 (25 A, Curve C) is the closest functional alternative — same 3-pole, 25 A, 10 kA interrupting rating, but with a lower magnetic trip threshold (5–10x In) better suited for general-purpose resistive and lighting loads rather than moderate-inrush applications.
The S203-K25 is rated 25 A continuous current.
The S203-K25 uses Trip Curve K, with a magnetic trip range of 10–14 times the rated current (In).
ABB typically provides RoHS, REACH, and CE declarations for the S200 series; UL and IEC 60898-1 certifications apply to this class. Specific documentation is available upon request with the RFQ.
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