ABB S203MT-K4H10 3-pole miniature circuit breaker with 4 A rated current, K curve tripping characteristic and 10 kA breaking capacity for railway and industrial circuit protection.
£87.44
The ABB S203MT-K4H10 is a premium 3-pole 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. Its K curve characteristic is ideal for circuits with higher inrush currents, making it suitable for motors, transformers, contactors and other inductive loads.
With a 4 A rated current, 3-pole configuration and 10 kA breaking capacity, the S203MT-K4H10 provides dependable protection for three-phase circuits in railway vehicles, industrial machinery and automation systems. Its compact DIN rail design enables straightforward installation inside modern control panels and electrical enclosures.
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur, protecting wiring and connected equipment from damage. The ABB S203MT-K4H10 combines thermal and magnetic tripping technologies to provide dependable protection in demanding railway and industrial environments.
Its K curve characteristic is particularly suited to applications with higher inrush currents, making it ideal for transformers, contactors, motors and other inductive loads where reliable protection without nuisance tripping is essential.
| Current | 4 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200MT |
| Model | S203MT-K4H10 |
| Alternative Product ID | 2CDV273006R0337 |
| EAN | 4016779771153 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 4 A |
| Tripping characteristic | K |
| Number of poles | 3 |
| Protected poles | 3 |
| Rated operational voltage | 440 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 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Failsafe bi-directional cylinder-lift screw terminals |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.38 kg |
The ABB S203MT-K4H10 protects three-phase electrical circuits against overloads and short circuits in railway and industrial installations.
The ABB S203MT-K4H10 has a 4 A rated current.
A K curve breaker is designed for circuits with higher inrush currents, making it suitable for motors, transformers, contactors and other inductive equipment.
This miniature circuit breaker has a 3-pole configuration for three-phase circuit protection.
The S203MT-K4H10 is designed for installation on a standard DIN rail using secure failsafe screw terminal connections.
ABB System pro M compact S200MT miniature circuit breakers are trusted by railway engineers, OEM machine builders and industrial electricians for dependable circuit protection, robust construction and long service life.
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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...