ABB S203P-K2NA System pro M compact miniature circuit breaker featuring a 3P+N configuration, 2 A rated current, K tripping characteristic and 25 kA breaking capacity for industrial and commercial circuit protection.
The ABB S203P-K2NA is a premium 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200P series. Designed to provide dependable overload and short circuit protection, it is ideal for industrial machinery, OEM equipment, commercial switchboards and electrical distribution systems where high-performance circuit protection is essential.
Featuring a K tripping characteristic and a 2 A rated current, the S203P-K2NA is specifically designed for circuits with elevated inrush currents, making it well suited to motors, transformers, contactors and other inductive loads. Its advanced current-limiting technology helps reduce fault energy, protecting connected equipment and improving overall system reliability.
With a 3P+N configuration and a 25 kA ultimate short circuit breaking capacity, this compact DIN rail mounted miniature circuit breaker delivers reliable protection for demanding three-phase installations. The S203P-K2NA is fully compatible with ABB's extensive range of modular accessories, providing flexibility for modern control panels and electrical installations.
The ABB S203P-K2NA combines delayed thermal overload protection with rapid electromagnetic short circuit protection to safeguard electrical installations and connected equipment. Its current-limiting construction helps minimise the energy released during fault conditions, reducing stress on cables, switchgear and electrical components.
The K tripping characteristic is specifically intended for circuits with higher inrush currents, making this miniature circuit breaker suitable for motors, transformers, solenoids, contactors and other inductive equipment commonly found in industrial automation and machine building.
| Current | 2 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K2NA |
| Product ID | 2CDS283103R0277 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 2 A |
| Tripping characteristic | K |
| Number of poles | 3P+N |
| Rated operational voltage | 400 V AC/DC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Ultimate short circuit breaking capacity (Icu) | 25 kA |
| Service short circuit breaking capacity (Ics) | 12.5 kA |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| Operating temperature | -25 to +55 °C |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
The S203P-K2NA protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.
This miniature circuit breaker has a 2 A rated current.
A K curve MCB is designed for circuits with higher inrush currents, making it suitable for motors, transformers, contactors and other inductive loads.
The S203P-K2NA is a 3P+N device with three protected poles and a switched neutral.
Yes. The S200P range is compatible with ABB auxiliary contacts, shunt trips, undervoltage releases, motor operators and other modular accessories.
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for dependable circuit protection, high fault performance and long-term reliability in demanding electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...