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ABB S201MT-K4NAH01 MCB – S200M – 1P+N – K – 4A
ABB S201MT-K4NAH01 miniature circuit breaker with 4 A rated current, K trip characteristic, 1P plus switched neutral configuration and 10 kA breaking capacity for industrial, commercial and traction applications.
Why Choose the ABB S201MT-K4NAH01 Miniature Circuit Breaker?
The ABB S201MT-K4NAH01 is a compact and reliable miniature circuit breaker (MCB) designed for dependable overload and short circuit protection in industrial, commercial, railway and traction electrical installations. Part of the ABB S200MT miniature circuit breaker range, it combines a K characteristic trip curve with a 4 A rated current, making it suitable for control circuits, auxiliary supplies and inductive loads with higher inrush currents.
This ABB MCB features a 1P + switched neutral arrangement, providing protection on the phase conductor while also switching the neutral conductor for improved circuit isolation. With a 10 kA rated breaking capacity, the S201MT-K4NAH01 delivers robust protection for control panels, OEM equipment and demanding electrical distribution systems.
Its modular DIN rail design supports fast installation inside electrical enclosures, while compatibility with ABB System pro M Compact accessories makes it a flexible and practical choice for panel builders, machine manufacturers and maintenance engineers.
Key Advantages
- High quality ABB miniature circuit breaker for reliable circuit protection.
- 4 A rated current suitable for control and auxiliary circuits.
- K characteristic trip curve designed for inductive loads and higher inrush currents.
- 1P + switched neutral configuration for phase protection with neutral switching.
- 10 kA breaking capacity for dependable short circuit protection.
- DIN rail mounting for quick installation in electrical panels.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 4 A rated current.
- K trip characteristic.
- 1 protected pole + switched neutral.
- 10 kA rated breaking capacity.
- Current limiting design for effective fault protection.
- Suitable for 50 / 60 Hz AC systems.
- Compact modular DIN rail construction.
- Screw terminal connections.
- Designed for industrial, commercial, traction and panel applications.
Reliable Protection for Control and Auxiliary Circuits
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overload or short circuit conditions occur. The ABB S201MT-K4NAH01 is designed for control and auxiliary circuits where dependable protection and precise tripping behaviour are important.
Its K characteristic makes it particularly useful for equipment that can produce higher start-up currents, such as control transformers, relays, solenoids and other inductive devices. The switched neutral configuration also supports convenient circuit isolation within control panels and distribution boards.
Typical Applications
- Control panels and automation systems.
- Auxiliary electrical circuits.
- Relay, solenoid and signalling circuits.
- Control transformers and inductive loads.
- Railway and traction electrical systems.
- Machine building and OEM equipment.
- Commercial and industrial distribution boards.
Technical Specifications
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| Phase | Single Phase | |
|---|---|---|
| Poles | 1-pole + N | |
| Current | 4 A | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S201MT-K4NAH01 | |
| Product type | Miniature circuit breaker (MCB) | |
| Product ID | 2CDO271106R0337 | |
| Rated current | 4 A | |
| Trip characteristic | K | |
| Number of poles | 1P + switched neutral | |
| Protected poles | 1 | |
| Rated short circuit capacity | 10 kA | |
| Rated voltage | 230 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Built-in depth | 69 mm | |
| Width | 2 modular units |
Frequently Asked Questions
What is the ABB S201MT-K4NAH01 used for?
It is used to provide overload and short circuit protection for control circuits, auxiliary systems, panel equipment and inductive loads.
What is the current rating of this MCB?
The ABB S201MT-K4NAH01 has a 4 A rated current.
What does the K trip characteristic mean?
The K characteristic is suitable for circuits with higher inrush currents, including control transformers, relays, solenoids and other inductive equipment.
What does 1P + switched neutral mean?
It means the breaker protects one phase conductor while also switching the neutral conductor for improved circuit isolation.
How is the ABB S201MT-K4NAH01 installed?
It is designed for installation on a standard 35 mm DIN rail inside an electrical enclosure or control panel.
Trusted by Electrical Professionals Worldwide
ABB miniature circuit breakers are widely used by panel builders, machine manufacturers, railway engineers, electrical contractors and industrial maintenance teams for dependable circuit protection, compact installation and proven long-term performance.
