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ABB S203MT-K6NA MCB – S200M – 3P+N – K – 6A
ABB S203MT-K6NA miniature circuit breaker, a 6 A 3-pole plus neutral K curve MCB from the ABB S200MT range for industrial, traction and railway applications.
£198.73
Why Choose the ABB S203MT-K6NA Miniature Circuit Breaker?
The ABB S203MT-K6NA is a high-performance miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for low-voltage electrical installations. As part of the ABB S200MT miniature circuit breaker range, it has been specifically developed for demanding industrial, traction and railway applications where dependable protection and long service life are essential.
Featuring a K curve tripping characteristic, the S203MT-K6NA is well suited to circuits with higher inrush currents, including transformers, motors and other inductive loads. Its current limiting design reduces fault energy, helping protect connected equipment while improving overall electrical safety.
With a rated current of 6 A and a 3-pole plus neutral configuration, this ABB circuit breaker is ideal for protecting three-phase systems requiring a switched neutral conductor. The modular DIN rail design allows fast installation within distribution boards, control panels and switchgear assemblies.
Key Advantages
- Compact miniature circuit breaker for circuit protection.
- 6 A rated current for low-current electrical circuits.
- 3-pole plus neutral configuration for three-phase systems.
- K curve tripping characteristic for circuits with higher inrush currents.
- 10 kA breaking capacity for dependable fault protection.
- DIN rail mounting for quick installation in electrical enclosures.
Key Features
- ABB S200MT miniature circuit breaker series.
- 6 A nominal current rating.
- 3 protected poles plus neutral.
- K type tripping curve for inductive loads.
- Thermal overload protection.
- Electromechanical short-circuit protection.
- Current limiting class 3 performance.
- Compatible with ABB System pro M compact accessories.
Reliable Circuit Protection for Industrial Applications
The ABB S203MT-K6NA automatically disconnects the electrical supply whenever overload or short-circuit conditions occur, helping prevent damage to cables, switchgear and connected equipment. Its current limiting performance minimises fault energy while improving operational safety.
Designed especially for railway and traction applications, the S200MT range complies with international standards and offers excellent reliability for demanding industrial environments.
Typical Applications
- Industrial automation and control panels.
- Railway and rolling stock electrical systems.
- Distribution boards and switchgear assemblies.
- Motor control and transformer circuits.
- Machine building and OEM equipment.
- Commercial and industrial low-voltage installations.
Technical Specifications
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| Current | 6 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-K6NA | |
| Manufacturer part number | 2CDS273106R0377 | |
| Product type | Miniature circuit breaker | |
| Rated current | 6 A | |
| Number of poles | 3 protected poles + neutral | |
| Total pole configuration | 4 pole | |
| Tripping characteristic | K curve | |
| Rated operational voltage | 440 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail mounting | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Net weight | approx. 0.46 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-K6NA used for?
The ABB S203MT-K6NA provides overload and short-circuit protection for three-phase electrical circuits, particularly those with inductive loads and higher inrush currents.
What is the current rating of this MCB?
The ABB S203MT-K6NA has a rated current of 6 A.
What does the K curve characteristic mean?
The K curve allows higher transient inrush currents while still providing dependable short-circuit protection, making it suitable for motors, transformers and inductive equipment.
Is this a 3-pole circuit breaker?
It features three protected poles together with a switched neutral, providing a 3P+N configuration for three-phase systems.
Where is the S203MT-K6NA typically installed?
It is commonly installed on DIN rail inside control panels, distribution boards, switchgear assemblies and railway electrical equipment.
Trusted by Electrical Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by panel builders, railway engineers and industrial electricians for dependable circuit protection in demanding low-voltage applications.
