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ABB S203MT-K1.6NA MCB – 3P+N – K Curve – 1.6A – 10kA
ABB S203MT-K2NA miniature circuit breaker, a 2 A 3P+N K curve MCB from the System pro M Compact S200MT range for traction, railway and specialist industrial circuit protection.
Why Choose the ABB S203MT-K2NA Miniature Circuit Breaker?
The ABB S203MT-K2NA is a specialist miniature circuit breaker (MCB) from the ABB System pro M Compact S200MT series, designed for traction, railway and demanding industrial electrical applications. Featuring a K characteristic trip curve, it provides dependable overload and short circuit protection for circuits with higher inrush currents.
The S200MT range is engineered for transport environments where reliability, compact installation and electrical safety are essential. This MCB combines delayed thermal overload protection with electromechanical short circuit protection, helping protect electrical circuits in rolling stock, rail infrastructure and specialist industrial control panels.
With a rated current of 2 A, a 3P+N configuration and a 10 kA breaking capacity, the S203MT-K2NA is ideal for low-current three-phase circuits requiring neutral switching in traction, railway and specialist industrial installations.
Key Advantages
- Specialist miniature circuit breaker designed for traction and railway applications.
- 2 A rated current for precision low-current circuit protection.
- K characteristic trip curve suitable for motors, transformers and inductive loads.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for dependable short circuit protection.
- DIN rail mounting for fast installation within electrical panels and distribution boards.
Key Features
- ABB System pro M Compact S200MT series.
- 2 A rated current.
- K curve tripping characteristic.
- 3P+N pole configuration.
- 10 kA rated short circuit breaking capacity.
- Designed specifically for traction and railway environments.
- Thermal overload and electromechanical short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Reliable Circuit Protection for Traction and Railway Systems
The ABB S203MT-K2NA automatically disconnects electrical circuits during overloads and short circuits. Its thermal tripping mechanism protects against prolonged overload conditions, while the electromechanical mechanism reacts rapidly to fault currents, helping reduce equipment damage and minimise downtime.
The K characteristic is designed for applications with higher inrush currents than standard C curve devices, making it suitable for inductive loads, motor circuits, transformers and specialist railway equipment.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock distribution panels.
- Control transformer protection.
- Motor and inductive load circuits.
- Industrial control panels.
- Electrical installations requiring neutral switching.
Technical Specifications
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| Current | 1.6 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Model | S203MT-K1.6NA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200MT | |
| Product ID | 2CDS273446R0257 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 2 A | |
| Number of protected poles | 3 | |
| Neutral pole | Switched neutral | |
| Pole configuration | 3P+N | |
| Trip characteristic | K | |
| Rated operational voltage | 400 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 | |
| Built-in depth | approx. 69 mm | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-K2NA used for?
It provides overload and short circuit protection for three-phase circuits used in traction, railway and specialist industrial electrical systems.
What does the K trip characteristic mean?
The K curve is intended for circuits with higher inrush currents, making it suitable for motors, transformers and inductive electrical loads.
What is the rated current of this MCB?
The ABB S203MT-K2NA has a rated current of 2 A.
What does 3P+N mean?
It provides three protected phase poles together with a switched neutral pole for three-phase installations.
Is this miniature circuit breaker designed for railway applications?
Yes. The ABB S200MT range is specifically designed for traction and railway applications, including rolling stock and transport infrastructure.
Trusted by Rail and Electrical Professionals Worldwide
ABB System pro M Compact S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial professionals for dependable circuit protection in demanding transport and electrical applications.
