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ABB S203-K20 MCB – S200 – 3P – K – 20A
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.
£68.12
Why Choose the ABB S203-K20 Miniature Circuit Breaker?
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.
Key Advantages
- High quality three-pole miniature circuit breaker.
- 20 A rated current with K tripping characteristic.
- Ideal for protecting motors, transformers and inductive loads.
- 6 kA breaking capacity for reliable fault protection.
- Thermal overload and magnetic short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB System pro M Compact S200 series.
- 20 A rated current.
- K tripping characteristic.
- Three-pole (3P) configuration.
- 6 kA rated short circuit breaking capacity.
- Current limiting design.
- DIN rail mounting.
- Failsafe bi-directional cylinder-lift screw terminals.
Reliable Protection for Industrial Electrical 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.
Typical Applications
- Motor control circuits.
- Industrial machinery.
- Automation control panels.
- Electrical distribution boards.
- Transformers and inductive loads.
- Commercial and industrial installations.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 20 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-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 |
Frequently Asked Questions
What is the ABB S203-K20 used for?
The ABB S203-K20 protects three-phase electrical circuits against overloads and short circuits in commercial, industrial and OEM applications.
What does the K tripping characteristic provide?
The K characteristic is designed for circuits with higher inrush currents, making it ideal for motors, transformers and other inductive equipment.
How many poles does this circuit breaker have?
The S203-K20 is a three-pole (3P) miniature circuit breaker.
What is the rated current?
This circuit breaker has a 20 A rated current.
How is the ABB S203-K20 installed?
The breaker is designed for 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 panel builders, machine manufacturers and electrical engineers for dependable circuit protection, consistent performance and long operational life.
