2CDS253001R0254 (S203-C25): S203-C25 breaker selection: circuit rating, trip curve and coordination
The ABB S203-C25 is a three-pole S200 miniature circuit breaker with a C tripping characteristic and a 25 A rated current. ABB lists a 6 kA rated short-circuit capacity at 400 V AC for this version. The breaker must be selected for conductor protection and the installation fault level, not simply by matching the nominal load current.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| Type | S203-C25 |
| Order code | 2CDS253001R0254 |
| Poles | 3P |
| Rated current | 25 A |
| Tripping characteristic | C curve |
| Rated short-circuit capacity | 6 kA at 400 V AC |
| Standard | IEC/EN 60898-1 |
| Mechanical endurance | 20,000 operating cycles reference |
The table summarizes family or catalog values for identification and initial selection. Confirm the nameplate, environmental limits, standards, revision and options for the exact device before procurement or engineering approval.
Application and system selection
A C curve is commonly considered where the connected load has moderate inrush, but the final selection depends on starting current, cable impedance, disconnection time and protective-device coordination. Check whether the load is continuous, whether ambient temperature affects grouping and whether additional residual-current protection is required.
Configuration and compatibility
Confirm poles, curve, current, voltage and the relevant breaking-capacity rating. Auxiliary or signaling contacts and busbar accessories must match the exact S200 variant. The catalog family contains different breaking capacities and curves, so a similar S203 designation may not provide the same fault interruption performance.
Related models and order-code references
The following designations are related catalog references, not automatic substitutes. Check each complete code, rating, connection, revision and application requirement before selecting a variant.
- 2CDS253001R0254-S203-C25
- 2CDS253001R0404-S203-C40
- S203-C10
- S203-C16
- S203-C2
- S203-C20
- S203-C25
- S203-C25 2CDS253001R0254
- S203-C32
- S203-C4 2CDS253001R0044
- S203-C40
- S203-C50
- S203-C6
- S203-C63
- S203-C80
Installation and commissioning
Mount the device in a compatible distribution assembly and follow the manufacturer’s connection and torque instructions. Verify line/load arrangement, busbar fit, labeling and fault-current suitability. After energizing, test the downstream circuit and confirm the trip path under the approved commissioning procedure; do not perform improvised live fault tests.
Replacement and procurement information
For a quotation or replacement review, provide the complete designation 2CDS253001R0254 (S203-C25), the order code where applicable, serial or hardware revision, quantity, operating environment, connected equipment and required delivery date. Include a legible nameplate image and relevant wiring, loop or switchgear drawing so the exact interface and configuration can be checked.
Ask the supplier to confirm accessories, revision compatibility and any approved successor in writing. Do not select solely from a family name or product photograph. Follow the current ABB installation and safety instructions for the exact unit.
