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ABB S203MT-K50 MCB – S200M – 3P – K – 50A
ABB S203MT-K50 3-pole 50 A miniature circuit breaker with K characteristic tripping curve and 10 kA breaking capacity for railway, traction and industrial circuit protection.
£184.31
Why Choose the ABB S203MT-K50 Miniature Circuit Breaker?
The ABB S203MT-K50 is a robust 3-pole miniature circuit breaker (MCB) designed for dependable overload and short circuit protection in railway, traction and demanding industrial applications. As part of the specialised ABB S200MT miniature circuit breaker series, it provides compact, reliable circuit protection for installations where performance, safety and long-term durability are essential.
This circuit breaker combines delayed thermal overload protection with electromagnetic short circuit protection. Its K characteristic tripping curve is designed for circuits with higher inrush currents, making it suitable for inductive loads such as motors, transformers, solenoids and auxiliary railway equipment.
With a 50 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-K50 provides effective protection for three-phase electrical systems. Its DIN rail mounted design enables straightforward installation in rolling stock electrical systems, industrial control panels, distribution boards and machine cabinets.
Key Advantages
- Specialist 3-pole miniature circuit breaker for railway and industrial installations.
- 50 A rated current suitable for higher load three-phase circuit protection.
- K characteristic tripping curve for circuits with higher inrush currents.
- 10 kA short circuit breaking capacity for dependable fault protection.
- Designed for traction and rolling stock electrical systems.
- DIN rail mounting for fast installation inside electrical panels.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- 50 A rated current.
- 3-pole configuration.
- K characteristic tripping curve.
- 10 kA rated short circuit breaking capacity.
- Thermal overload and electromagnetic short circuit protection.
- DIN rail mounting for modular panel installation.
- Suitable for railway, traction, automation and industrial distribution systems.
Reliable Circuit Protection for Inductive Three-Phase Systems
The ABB S200MT range is engineered for railway and traction environments where reliable low voltage protection is critical. These miniature circuit breakers help protect conductors, control equipment and downstream devices from damage caused by overloads and short circuits.
The K curve characteristic of the S203MT-K50 provides a higher instantaneous trip threshold than standard general-purpose curves. This makes it well suited to circuits where temporary start-up currents may occur, helping reduce nuisance tripping while maintaining effective protection under fault conditions.
Typical Applications
- Railway rolling stock electrical systems.
- Traction and transport control panels.
- Three-phase industrial distribution boards.
- Machine control panels.
- Automation and auxiliary power circuits.
- Motors, transformers and inductive loads.
Technical Specifications
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| Current | 50 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-K50 | |
| Product type | Miniature circuit breaker (MCB) | |
| Product ID | 2CDS273006R0577 | |
| EAN | 4016779770361 | |
| Rated current | 50 A | |
| Number of poles | 3 | |
| Tripping characteristic | K | |
| Rated short circuit breaking capacity | 10 kA | |
| Rated operational voltage | 400 V AC / 440 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Current limiting class | Class 3 | |
| Typical applications | Railway, rolling stock, traction systems, industrial control panels and inductive three-phase circuits | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-K50 used for?
The S203MT-K50 is used to protect three-phase electrical circuits against overloads and short circuits in railway, traction and industrial applications.
What current rating does this MCB have?
The ABB S203MT-K50 has a 50 A rated current.
What does the K tripping characteristic mean?
The K curve is designed for circuits with higher inrush currents, making it suitable for inductive loads such as motors, transformers and control equipment.
How many poles does the S203MT-K50 have?
This model has a 3-pole configuration, making it suitable for three-phase circuit protection.
Is the ABB S203MT-K50 suitable for railway applications?
Yes, the S200MT range is designed especially for traction and railway applications, including rolling stock electrical systems and transport control panels.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electrical professionals for reliable circuit protection, compact installation and long service life in demanding low voltage systems.
