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-K40NA MCB – S200M – 1P+N – K – 40A
ABB S201MT-K40NA miniature circuit breaker with 1+N configuration, 40 A rated current, K trip characteristic and 10 kA breaking capacity for railway and industrial applications.
£110.77
Why Choose the ABB S201MT-K40NA Miniature Circuit Breaker?
The ABB S201MT-K40NA is a premium 1P+N miniature circuit breaker (MCB) engineered specifically for railway, traction and demanding industrial applications. As part of the specialist ABB S200MT series, it delivers dependable overload and short circuit protection whilst meeting the rigorous requirements of rolling stock, transport infrastructure and industrial control systems.
Designed for continuous operation in harsh environments, the S201MT-K40NA incorporates a delayed thermal tripping mechanism for overload protection together with an electromechanical tripping mechanism for rapid short circuit interruption. Its compact DIN rail mounted construction allows simple installation into electrical distribution boards, machine control panels and railway electrical cabinets.
Featuring a 40 A rated current, K characteristic trip curve and a 10 kA breaking capacity, this miniature circuit breaker is ideal for protecting motors, transformers and other inductive loads with higher inrush currents whilst maintaining excellent fault protection and operational reliability.
Key Advantages
- Designed specifically for railway and traction applications.
- 40 A rated current for dependable circuit protection.
- K characteristic tripping suitable for higher inrush current circuits.
- 1P+N configuration with switched neutral.
- 10 kA short circuit breaking capacity.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- 40 A rated operational current.
- K trip characteristic.
- 1+N pole configuration.
- 230 V AC rated operational voltage.
- 10 kA rated short circuit capacity.
- Thermal and electromechanical tripping mechanisms.
- DIN rail mounting with failsafe screw terminals.
Reliable Circuit Protection for Railway Applications
The ABB S200MT range has been developed specifically for railway and traction installations where electrical protection devices must withstand demanding operating conditions. The S201MT-K40NA provides reliable protection against overloads and short circuits whilst ensuring long service life and dependable switching performance.
Its K characteristic permits higher inrush currents during equipment start-up, making it particularly suitable for motors, transformers and other inductive loads without unnecessary nuisance tripping.
Typical Applications
- Railway rolling stock electrical systems.
- Traction auxiliary power circuits.
- Industrial motor protection.
- Transformer and inductive load protection.
- Industrial control panels.
- Machine building and automation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 40 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-K40NA | |
| Product type | Miniature circuit breaker | |
| Rated current | 40 A | |
| Trip characteristic | K | |
| Number of poles | 1+N | |
| Number of protected poles | 1 | |
| Rated operational voltage | 230 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short circuit capacity | 10 kA | |
| Rated ultimate short circuit breaking capacity | 15 kA | |
| Rated service short circuit breaking capacity | 11.3 kA | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Energy limiting class | 3 | |
| Power loss | 12.8 W | |
| Protection rating | IP20 (IP40 when installed within an enclosure) | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 35 × 69 mm | |
| Weight | Approx. 0.25 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S201MT-K40NA used for?
The S201MT-K40NA protects electrical circuits against overloads and short circuits in railway, traction and industrial electrical installations.
What is the rated current of this circuit breaker?
The ABB S201MT-K40NA has a 40 A rated current.
What does the K trip characteristic mean?
The K characteristic is designed for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive loads.
What is the short circuit breaking capacity?
This miniature circuit breaker provides a 10 kA rated short circuit breaking capacity.
Where is the S201MT-K40NA installed?
It is designed for installation on DIN rails within railway electrical cabinets, industrial control panels and electrical distribution boards.
Trusted for Railway and Industrial Protection
ABB S200MT miniature circuit breakers are trusted worldwide by railway operators, machine builders and industrial engineers to provide reliable circuit protection in demanding electrical environments.
