ABB S203-K20 three-pole 20 A K curve miniature circuit breaker from the System pro M Compact S200 range for overload and short circuit protection in industrial and commercial electrical installations.
£123.85
The ABB S203-K20 is a robust three-pole miniature circuit breaker (MCB) from the renowned ABB System pro M Compact S200 series. Designed to safeguard electrical installations against overloads and short circuits, it delivers dependable protection for commercial, industrial and OEM applications where reliability and safety are essential.
Featuring a K tripping characteristic, the S203-K20 is particularly well suited to protecting circuits with moderate to high inrush currents, such as motors, transformers, control equipment and inductive loads. Its advanced thermal and magnetic trip mechanisms ensure rapid fault clearance while helping to minimise nuisance tripping during normal operation.
With a 20 A rated current, three protected poles and a 6 kA breaking capacity, the ABB S203-K20 offers long service life, compact DIN rail installation and compatibility with ABB's comprehensive range of accessories for modern electrical distribution systems.
The ABB S203-K20 automatically disconnects electrical circuits during overload and short circuit conditions, helping to protect valuable equipment, minimise downtime and improve installation safety. Its K characteristic makes it an excellent choice for circuits supplying equipment with higher starting currents.
Built to meet recognised international standards, the S203-K20 offers excellent electrical endurance, long mechanical life and seamless integration into industrial control panels, switchboards and electrical distribution systems.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-K20 |
| Manufacturer Part Number | 2CDS253001R0487 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Number of poles | 3P |
| Tripping characteristic | K |
| Rated operational voltage | Up to 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short circuit breaking capacity | 6 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.345 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-K20 protects three-phase electrical circuits against overloads and short circuits in commercial, industrial and OEM applications.
The K characteristic is designed for circuits with higher inrush currents, making it ideal for motors, transformers and other inductive equipment.
The S203-K20 is a three-pole (3P) miniature circuit breaker.
This circuit breaker has a 20 A rated current.
The breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M Compact miniature circuit breakers are trusted worldwide by panel builders, machine manufacturers and electrical engineers for dependable circuit protection, consistent performance and long operational life.
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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...