ABB S203M-K2NA 4-pole miniature circuit breaker with 2 A rated current, K curve tripping characteristic and 10 kA breaking capacity for industrial circuit protection.
£187.71
The ABB S203M-K2NA is a robust 4-pole miniature circuit breaker (MCB) from the proven ABB System pro M compact S200M series. Designed to provide dependable protection against overloads and short circuits, it is suitable for industrial, commercial and OEM electrical installations where high performance and reliability are essential.
Featuring ABB's advanced current-limiting technology, the S203M-K2NA incorporates both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its K curve characteristic makes it particularly suitable for circuits with higher inrush currents such as motors, transformers and inductive loads.
With a 2 A rated current, 4-pole configuration and 10 kA breaking capacity, this miniature circuit breaker provides reliable protection for three-phase electrical systems requiring neutral switching. Its compact DIN rail design allows straightforward installation into modern control panels and distribution boards.
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur, protecting wiring and connected equipment from damage. The ABB S203M-K2NA combines thermal and magnetic trip mechanisms to deliver fast, dependable protection in demanding applications.
Its K curve characteristic makes it especially suitable for installations where motors, transformers and other inductive loads generate temporary inrush currents during start-up, reducing nuisance tripping while maintaining excellent fault protection.
| Current | 2 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-K2NA |
| Product ID | 2CDS273103R0277 |
| EAN | 4016779659475 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 2 A |
| Tripping characteristic | K |
| Number of poles | 4 |
| 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 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Built-in depth | 69 mm |
| Weight | approx. 0.46 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-K2NA protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and automation applications.
The ABB S203M-K2NA has a 2 A rated current.
The K curve is designed for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive equipment.
This miniature circuit breaker has a 4-pole configuration with three protected poles and a switched neutral.
The circuit breaker is designed for standard DIN rail mounting within electrical distribution boards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for delivering dependable protection, excellent reliability and long service life.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...