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ABB S203-K50 MCB – S200 – 3P – K – 50A
ABB S203-K50 three-pole 50 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.
£85.32
Why Choose the ABB S203-K50 Miniature Circuit Breaker?
The ABB S203-K50 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed to provide dependable protection against overloads and short circuits, it is ideally suited for industrial machinery, motor control circuits and commercial electrical installations where higher inrush currents are present.
Featuring a K tripping characteristic, the S203-K50 is specifically engineered for applications involving motors, transformers, compressors, contactors and other inductive loads. Its advanced thermal and electromagnetic trip mechanisms provide dependable overload protection while allowing high starting currents without nuisance tripping.
With a 50 A rated current, three protected poles and a 6 kA breaking capacity, the ABB S203-K50 delivers reliable circuit protection, straightforward DIN rail installation and full compatibility with ABB's extensive range of System pro M Compact accessories.
Key Advantages
- Premium three-pole miniature circuit breaker.
- 50 A rated current with K tripping characteristic.
- Designed for motors, transformers and inductive loads.
- 6 kA rated breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB System pro M Compact S200 series.
- 50 A rated current.
- K tripping characteristic.
- Three-pole (3P) configuration.
- 6 kA rated short circuit breaking capacity.
- Current limiting construction.
- DIN rail mounting.
- Failsafe bi-directional cylinder-lift screw terminals.
Reliable Protection for High Inrush Current Circuits
The ABB S203-K50 automatically disconnects electrical circuits during overload and short circuit conditions, helping to protect valuable equipment, reduce downtime and improve electrical safety. Its K characteristic makes it particularly suitable for circuits supplying motors and other equipment with elevated starting currents.
Manufactured in accordance with IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 standards, the S203-K50 delivers excellent electrical endurance, long mechanical life and dependable performance in demanding industrial and commercial environments.
Typical Applications
- Motor control circuits.
- Industrial machinery.
- Transformers.
- Compressors.
- Automation control panels.
- Commercial and industrial distribution boards.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Phase | Three Phase | |
| Current | 50 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-K50 | |
| Manufacturer Part Number | 2CDS253001R0577 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 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 (IP40 when installed in an enclosure) | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| Weight | Approx. 0.36 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-K50 used for?
The ABB S203-K50 protects three-phase electrical circuits against overloads and short circuits, particularly where motors and other inductive loads are installed.
What does the K tripping characteristic mean?
The K characteristic is designed for circuits with higher inrush currents, making it ideal for motors, transformers, compressors and similar inductive equipment.
How many poles does this circuit breaker have?
The ABB S203-K50 is a three-pole (3P) miniature circuit breaker.
What is the rated current?
This miniature circuit breaker has a 50 A rated current.
How is the ABB S203-K50 installed?
The breaker is designed for secure installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and OEM manufacturers for dependable circuit protection, outstanding reliability and long service life.
