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ABB S201MT-K4NA MCB – S200M – 1P+N – K – 4A
ABB S201MT-K4NA miniature circuit breaker featuring 4 A rated current, K characteristic, 1P+N configuration and 10 kA breaking capacity for railway and traction applications.
£94.93
Why Choose the ABB S201MT-K4NA Miniature Circuit Breaker?
The ABB S201MT-K4NA is a premium 1P+N miniature circuit breaker (MCB) developed specifically for traction, railway and transport applications. As part of the specialist ABB S200MT series, it delivers dependable overload and short circuit protection for rolling stock, signalling equipment and railway infrastructure where safety and reliability are critical.
Built using ABB's advanced thermal and magnetic tripping technology, the S201MT-K4NA provides reliable fault interruption whilst minimising nuisance tripping. Its K characteristic is designed for circuits with higher inrush currents, making it ideal for transformers, relays, contactors, motors and other inductive loads commonly found in railway electrical systems.
Featuring a 4 A rated current, K characteristic trip curve and a 10 kA rated short circuit breaking capacity, the ABB S201MT-K4NA combines high performance protection with a compact DIN rail mounted design that integrates seamlessly into modern electrical installations.
Key Advantages
- Designed specifically for railway and traction applications.
- 4 A rated current for control and auxiliary circuits.
- K characteristic for higher inrush current applications.
- 10 kA short circuit breaking capacity.
- Current limiting Class 3 design reduces fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 1P+N configuration.
- 4 A rated current.
- K characteristic thermal magnetic tripping.
- 10 kA rated short circuit breaking capacity.
- 15 kA ultimate breaking capacity (Icu).
- Energy Limiting Class 3.
- DIN rail mounting.
Reliable Circuit Protection for Railway Electrical Systems
The ABB S200MT range has been specifically engineered for railway and transport applications where dependable protection is essential. Thermal overload protection combined with instantaneous magnetic tripping helps safeguard equipment against damaging electrical faults whilst maintaining operational continuity.
Its K characteristic enables the S201MT-K4NA to accommodate higher inrush currents without unnecessary tripping, making it particularly suitable for transformers, contactors, relays and other inductive electrical loads found in industrial and railway installations.
Typical Applications
- Railway rolling stock.
- Traction power systems.
- Control panels and switchboards.
- Transformer protection.
- Industrial control equipment.
- Auxiliary electrical circuits.
Technical Specifications
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| Current | 4 A | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S201MT-K4NA | |
| Product ID | 2CDS271106R0337 | |
| Product type | Miniature circuit breaker | |
| Rated current | 4 A | |
| Trip characteristic | K | |
| Number of poles | 1P+N | |
| Protected poles | 1 | |
| Rated operational voltage | 230 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 10 kA | |
| Ultimate breaking capacity (Icu) | 15 kA | |
| Service breaking capacity (Ics) | 11.2 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 35 × 69 mm | |
| Weight | approx. 0.25 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S201MT-K4NA used for?
The S201MT-K4NA protects electrical circuits against overloads and short circuits in railway, traction and industrial control applications.
What is the rated current?
This miniature circuit breaker has a 4 A rated current.
What does the K characteristic mean?
The K characteristic is designed for circuits with higher inrush currents, making it suitable for transformers, motors, relays and other inductive loads.
What is the breaking capacity?
The S201MT-K4NA provides a 10 kA rated short circuit breaking capacity with a 15 kA ultimate breaking capacity.
How is the circuit breaker installed?
The breaker is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards and control panels.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted worldwide for delivering dependable circuit protection, long service life and reliable performance in demanding railway and industrial electrical installations.
