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2CDS271445R0501 ABB S201MT-D50 50A 1P Type D 10kA Miniature Circuit Breaker
ABB S201MT-D50 is a 50 A single-pole Type D miniature circuit breaker with 10 kA breaking capacity, designed for reliable overload and short-circuit protection of railway and traction electrical circuits with high-inrush loads.
£57.58
Why Choose the ABB S201MT-D50 Miniature Circuit Breaker?
The ABB S201MT-D50 is a specialised single-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding railway and traction electrical systems. Part of the ABB S200 MT traction MCB series, it combines a high current rating with compact modular construction for use in rolling stock distribution and auxiliary circuits.
This miniature circuit breaker features a 50 A rated current, Type D tripping characteristic and 10 kA short-circuit breaking capacity. The D characteristic is suited to circuits with high temporary starting or inrush currents, making the S201MT-D50 appropriate for compatible transformers, motors, power supplies and other equipment where substantial current peaks can occur during normal energisation.
The S201MT-D50 uses a compact single-pole format for DIN-rail installation. Its specialised S200 MT platform is developed for traction environments, providing circuit protection for railway electrical systems where reliable operation, high fault-current interruption and tolerance of demanding operating conditions are essential.
Key Advantages
- Specialised miniature circuit breaker for railway and traction applications.
- 50 A rated current for higher-current circuit protection.
- Type D tripping characteristic suited to circuits with high starting and inrush currents.
- 10 kA short-circuit breaking capacity for robust fault protection.
- Helps minimise unwanted magnetic tripping during permissible high-inrush events.
- Thermal and magnetic mechanisms provide overload and short-circuit protection.
- Single-pole modular construction supports space-efficient panel layouts.
- DIN-rail mounting simplifies integration into traction distribution and control assemblies.
Key Features
- ABB S200 MT traction MCB series.
- 50 A rated current.
- 1-pole configuration.
- D tripping characteristic.
- 10 kA short-circuit breaking capacity.
- Designed for railway and traction electrical installations.
- Suitable for compatible circuits with substantial temporary inrush currents.
- Thermal overload protection for sustained overcurrent conditions.
- Magnetic protection for rapid interruption of severe short-circuit faults.
- Compact modular construction for efficient use of distribution-board space.
- DIN-rail mounting for straightforward installation and servicing.
Type D Protection for High-Inrush Loads
The Type D characteristic is intended for circuits where connected equipment can draw substantial temporary current during normal start-up or energisation. This makes the ABB S201MT-D50 particularly useful for compatible transformers, motors, power supplies and other high-inrush loads, helping to prevent unnecessary magnetic tripping while maintaining effective protection against genuine fault currents.
During sustained overload conditions, the thermal tripping mechanism disconnects the protected circuit, while the magnetic mechanism provides rapid operation during severe short-circuit faults. Combined with the specialised S200 MT traction platform, the S201MT-D50 provides dependable protection for higher-current railway electrical circuits.
Typical Applications
- Railway rolling stock electrical systems.
- Train auxiliary power circuits.
- Traction electrical distribution panels.
- Rail vehicle control and power cabinets.
- Transformer and motor circuits with high starting currents.
- Power supplies and other compatible high-inrush electrical loads.
Technical Specifications
| Series | S200 MT |
|---|---|
| ABB order code | 2CDS271445R0501 |
| Product type | Miniature circuit breaker (MCB) |
| Product group | DC / Traction MCB |
| Application | Railway / traction circuit protection |
| Number of poles | 1 |
| Protected poles | 1 |
| Rated current | 50 A |
| Tripping characteristic | Type D |
| Short-circuit breaking capacity | 10 kA |
| Protection function | Overload and short-circuit protection |
| Load suitability | High-inrush electrical loads |
| Mounting type | DIN rail |
| Construction | Modular |
Frequently Asked Questions
What is the ABB S201MT-D50 used for?
The ABB S201MT-D50 is a single-pole miniature circuit breaker designed to protect electrical circuits against overloads and short circuits, particularly in railway and traction applications involving higher-current or high-inrush loads.
What is the rated current of the S201MT-D50?
The S201MT-D50 has a rated current of 50 A.
What does the Type D characteristic mean?
The Type D tripping characteristic is suited to circuits with high temporary starting or inrush currents, such as compatible transformer, motor and power-supply loads, helping to reduce unwanted magnetic tripping during normal energisation.
What is the breaking capacity of the ABB S201MT-D50?
The ABB S201MT-D50 has a 10 kA short-circuit breaking capacity, providing dependable interruption of fault currents within its specified operating conditions.
Is the S201MT-D50 suitable for railway applications?
Yes. The ABB S200 MT series is designed for railway and traction circuit protection, making the S201MT-D50 suitable for compatible electrical circuits in rolling stock and traction installations.
Trusted Circuit Protection from ABB
ABB S200 MT miniature circuit breakers provide specialised overload and short-circuit protection for railway and traction electrical systems, combining high breaking capacity, compact modular construction and application-specific tripping characteristics for demanding rolling stock installations.
