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ABB S203MT-K2NA MCB – S200M – 3P+N – K – 2A
ABB S203MT-K2NA 3P+N miniature circuit breaker with 2 A rated current, K curve tripping characteristic and 10 kA breaking capacity for railway and industrial circuit protection.
Why Choose the ABB S203MT-K2NA Miniature Circuit Breaker?
The ABB S203MT-K2NA is a premium 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200MT series. Specifically developed for traction, railway and demanding industrial applications, it delivers dependable protection against overloads and short circuits while maintaining excellent reliability in harsh operating environments.
The S200MT range incorporates ABB's advanced current-limiting technology with both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. The range complies with IEC/EN 60898-1 and IEC/EN 60947-2 and is classified to NF F 16-101/102 Exigence 3, making it suitable for installation throughout railway vehicles as well as industrial electrical systems.
With a 2 A rated current, K curve tripping characteristic, 3P+N configuration and 10 kA breaking capacity, the S203MT-K2NA is ideal for protecting low-current three-phase distribution circuits, control panels, automation systems and inductive loads requiring neutral switching.
Key Advantages
- Compact 3P+N miniature circuit breaker for railway and industrial applications.
- 2 A rated current for precise low-current protection.
- K curve tripping characteristic suitable for motors, transformers and inductive loads.
- 10 kA rated short-circuit breaking capacity.
- Current-limiting design helps reduce fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200MT series.
- Product ID: 2CDS273106R0277.
- Model: S203MT-K2NA.
- Rated current: 2 A.
- K curve tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- Thermal overload and electromechanical short-circuit protection.
- DIN rail mounting with failsafe bi-directional cylinder-lift screw terminals.
Reliable Protection for Railway and Industrial Systems
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur, protecting wiring and connected equipment from damage. The ABB S203MT-K2NA combines thermal and magnetic tripping technologies to deliver dependable protection for demanding railway and industrial electrical systems.
Its K curve characteristic is particularly suited to applications with higher inrush currents, including transformers, contactors, solenoids and motor control circuits. Combined with the robust construction of the S200MT range, it provides dependable long-term protection in demanding environments.
Typical Applications
- Railway rolling stock.
- Industrial control panels.
- Motor control circuits.
- Transformer protection.
- Automation systems.
- OEM machinery and equipment.
Technical Specifications
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| Current | 2 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200MT | |
| Model | S203MT-K2NA | |
| Product ID | 2CDS273106R0277 | |
| EAN | 4016779771603 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 2 A | |
| Tripping characteristic | K | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Rated insulation voltage | 440 V | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 10 kA | |
| Rated ultimate short-circuit breaking capacity | 15 kA | |
| Rated service short-circuit breaking capacity | 11.3 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Failsafe bi-directional cylinder-lift screw terminals | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Weight | approx. 0.50 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-K2NA used for?
The ABB S203MT-K2NA protects three-phase electrical circuits against overloads and short circuits in railway, industrial and commercial installations.
What is the rated current of this MCB?
The ABB S203MT-K2NA has a 2 A rated current.
What does the K curve characteristic mean?
A K curve breaker is designed for circuits with higher inrush currents, making it suitable for motors, transformers, contactors and other inductive equipment.
How many poles does the S203MT-K2NA have?
This miniature circuit breaker has a 3P+N configuration with three protected poles and a switched neutral.
How is the ABB S203MT-K2NA installed?
The S203MT-K2NA is designed for installation on a standard DIN rail using secure failsafe screw terminal connections.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electricians for dependable circuit protection, robust construction and long service life.
