Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
ABB S201MT-K25NA MCB – S200M – 1P+N – K – 25A
ABB S201MT-K25NA miniature circuit breaker from the S200MT railway series, featuring 1+N configuration, 25 A rated current, K trip characteristic and 10 kA short circuit breaking capacity.
£94.93
Why Choose the ABB S201MT-K25NA Miniature Circuit Breaker?
The ABB S201MT-K25NA is a robust and dependable 1P+N miniature circuit breaker (MCB) designed for railway, traction and demanding industrial applications. Part of the specialist ABB S200MT series, it provides reliable overload and short circuit protection for electrical circuits where operational safety and long-term performance are essential.
Built for challenging environments, the S201MT-K25NA combines delayed thermal tripping for overload protection with an electromechanical trip mechanism for fast short circuit interruption. Its compact DIN rail mounted design allows easy installation into control panels, electrical distribution boards and railway electrical enclosures.
With a 25 A rated current, K characteristic trip curve and 10 kA short circuit breaking capacity, this miniature circuit breaker is particularly suited to circuits with higher inrush currents, including motors, transformers, solenoids and inductive loads used in transport and industrial automation systems.
Key Advantages
- Specialist railway miniature circuit breaker for traction and industrial applications.
- 25 A rated current for reliable circuit protection.
- K curve tripping characteristic suitable for higher inrush loads.
- 1P+N configuration with switched neutral conductor.
- 10 kA rated short circuit capacity for dependable fault interruption.
- Compact DIN rail mounted construction for efficient panel installation.
Key Features
- ABB S200MT miniature circuit breaker series.
- 25 A rated operational current.
- K trip characteristic for inductive and high inrush loads.
- 1+N pole arrangement.
- 230 V AC rated operational voltage.
- 10 kA rated short circuit breaking capacity.
- Thermal and electromechanical tripping mechanisms.
- DIN rail mounting with failsafe screw terminal connections.
Reliable Circuit Protection for Railway Applications
The ABB S200MT range is designed to support dependable protection in railway and traction environments where electrical devices must operate reliably under vibration, temperature variation and continuous service conditions. The S201MT-K25NA helps protect circuits against overloads and short circuits while maintaining safe and consistent operation.
The K curve characteristic makes this breaker suitable for loads with higher starting currents. This helps reduce nuisance tripping during normal energisation while maintaining effective protection against genuine fault conditions.
Typical Applications
- Railway rolling stock electrical systems.
- Traction auxiliary power circuits.
- Transformer protection circuits.
- Motor and inductive load protection.
- Industrial control panels and distribution boards.
- Automation, signalling and machine control systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 25 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-K25NA | |
| Product type | Miniature circuit breaker | |
| Rated current | 25 A | |
| Trip characteristic | K | |
| Number of poles | 1+N | |
| Number of protected poles | 1 | |
| Rated operational voltage | 230 V AC | |
| Voltage type | AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short circuit capacity | 10 kA at 230 V AC | |
| Rated ultimate short circuit breaking capacity | 15 kA | |
| Rated service short circuit breaking capacity | 11.2 kA | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Energy limiting class | 3 | |
| Power loss | 6.2 W | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 35 × 69 mm | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S201MT-K25NA used for?
The S201MT-K25NA is used to protect electrical circuits against overloads and short circuits, particularly in railway, traction and industrial control applications.
What is the rated current of the S201MT-K25NA?
The ABB S201MT-K25NA has a 25 A rated current.
What does the K trip curve mean?
The K trip curve is designed for circuits with higher inrush currents, making it suitable for inductive loads such as motors, transformers and solenoids.
What breaking capacity does this MCB provide?
This miniature circuit breaker provides a 10 kA short circuit breaking capacity at 230 V AC.
How is the ABB S201MT-K25NA installed?
It is designed for DIN rail mounting inside electrical panels, control cabinets and railway electrical enclosures.
Trusted for Railway and Industrial Protection
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial maintenance teams for dependable circuit protection in demanding electrical installations.
