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ABB S203-B50 MCB – S200 – 3P – B – 50A
ABB S203-B50 three-pole 50 A B curve miniature circuit breaker from the System pro M Compact S200 range for overload and short circuit protection in commercial and industrial electrical installations.
£44.86
Why Choose the ABB S203-B50 Miniature Circuit Breaker?
The ABB S203-B50 is a premium three-pole miniature circuit breaker (MCB) from the proven ABB System pro M Compact S200 series. Designed to provide dependable protection against overloads and short circuits, it is ideal for commercial, industrial and OEM electrical installations where reliable circuit protection is essential.
Featuring a B tripping characteristic, the S203-B50 is intended for circuits with low inrush currents, making it suitable for lighting circuits, socket outlets, heating systems and general-purpose electrical distribution. Its precision thermal and magnetic tripping mechanisms provide fast fault clearance while ensuring reliable everyday operation.
With a 50 A rated current, three protected poles and a 6 kA breaking capacity, the ABB S203-B50 provides dependable circuit protection, straightforward DIN rail installation and full compatibility with ABB System pro M Compact accessories.
Key Advantages
- High quality three-pole miniature circuit breaker.
- 50 A rated current with B tripping characteristic.
- Ideal for general commercial and industrial electrical circuits.
- 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.
- B 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 General Electrical Installations
The ABB S203-B50 automatically disconnects electrical circuits during overload and short circuit conditions, helping to protect equipment, improve installation safety and minimise downtime. Its B characteristic is particularly suitable for resistive loads and standard power distribution circuits where low inrush currents are expected.
Manufactured in accordance with IEC/EN 60898-1, IEC/EN 60947-2 and UL1077 standards, the S203-B50 delivers dependable long-term performance, excellent electrical endurance and reliable protection across a wide range of commercial and industrial applications.
Typical Applications
- Commercial electrical installations.
- Industrial distribution boards.
- Lighting circuits.
- Power distribution systems.
- Control panels.
- OEM electrical equipment.
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 | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-B50 | |
| Manufacturer Part Number | 2CDS253001R0505 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 A | |
| Number of poles | 3P | |
| Tripping characteristic | B | |
| 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. 0.36 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-B50 used for?
The ABB S203-B50 protects three-phase electrical circuits against overloads and short circuits in commercial, industrial and OEM installations.
What does the B tripping characteristic mean?
The B characteristic is designed for circuits with relatively low inrush currents, making it ideal for lighting, socket outlets and general-purpose electrical distribution.
How many poles does this circuit breaker have?
The ABB S203-B50 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-B50 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, long service life and consistent performance.
