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 S201-K40NA MCB – 1P+N – K Curve – 40A – 6kA
ABB S201-K40NA miniature circuit breaker featuring a 40 A rated current, K characteristic tripping curve, 1P+N configuration and 6 kA breaking capacity for reliable protection of inductive electrical circuits.
£50.89
Why Choose the ABB S201-K40NA Miniature Circuit Breaker?
The ABB S201-K40NA is a premium miniature circuit breaker (MCB) from the proven ABB System pro M Compact S200 series, engineered to provide reliable overload and short circuit protection for commercial, industrial and OEM electrical installations. Featuring a K characteristic tripping curve, it is ideally suited to circuits supplying motors, transformers, contactors and other inductive loads with higher starting currents.
Manufactured to ABB's renowned engineering standards, the S201-K40NA combines thermal overload protection with magnetic short circuit protection to deliver dependable current limiting performance and long operational life. Its compact modular design enables fast DIN rail installation while helping maximise available panel space.
With a 40 A rated current, 1P+N configuration and a 6 kA breaking capacity, this miniature circuit breaker provides robust protection for demanding industrial, commercial and machine building applications.
Key Advantages
- Reliable ABB System pro M Compact S200 miniature circuit breaker.
- 40 A rated current for dependable circuit protection.
- K characteristic tripping curve for inductive loads and motor circuits.
- 1P+N configuration providing phase and neutral switching.
- 6 kA breaking capacity for reliable fault protection.
- Compact DIN rail mounted design for straightforward installation.
Key Features
- ABB S201-K40NA miniature circuit breaker.
- System pro M Compact S200 series.
- 40 A rated current.
- K characteristic tripping curve.
- 1P+N pole configuration.
- 6 kA rated breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Compatible with ABB S200 auxiliary accessories.
Reliable Protection for Inductive Load Applications
The ABB S201-K40NA is specifically designed for circuits supplying motors, transformers and other inductive equipment where higher starting currents are expected. The K characteristic trip curve tolerates temporary inrush currents while maintaining rapid disconnection under genuine overload or short circuit conditions, helping improve equipment protection and operational reliability.
Its compact modular construction and compatibility with ABB's extensive System pro M accessory range make it an excellent choice for panel builders, maintenance engineers and electrical contractors requiring dependable protection across demanding industrial environments.
Typical Applications
- Motor starter circuits.
- Industrial control panels.
- Transformer protection.
- Machinery and automation systems.
- OEM electrical equipment.
- Commercial electrical distribution.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Current | 40 A | |
| Phase | Single Phase | |
| Poles | 1-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S201-K40NA | |
| Product ID | 2CDS251103R0557 | |
| EAN | 4016779531962 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 40 A | |
| Tripping characteristic | K | |
| Number of poles | 1P+N | |
| Rated operational voltage | 230 / 400 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Breaking capacity | 6 kA | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 35 × 69 mm | |
| Weight | approx. 0.25 kg | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S201-K40NA used for?
The ABB S201-K40NA protects electrical circuits against overloads and short circuits, particularly where inductive loads and higher starting currents are present.
What is the rated current of this circuit breaker?
The S201-K40NA has a 40 A rated current.
What does the K characteristic tripping curve mean?
The K curve is designed for motor circuits, transformers and other inductive loads that generate higher inrush currents during start-up.
How is the S201-K40NA installed?
The breaker is designed for DIN rail mounting inside electrical distribution boards, consumer units and industrial control panels.
Which standards does the S201-K40NA comply with?
The S201-K40NA complies with IEC/EN 60898-1, IEC/EN 60947-2 and UL1077 standards.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted by electricians, panel builders and industrial engineers worldwide for reliable circuit protection, excellent current limiting performance and long operational life.
