ABB S203MT-K63H01 miniature circuit breaker from the S200MT series featuring a 63 A rated current, K tripping characteristic and 3-pole configuration for traction, railway and industrial circuit protection.
£217.52
The ABB S203MT-K63H01 is a heavy-duty miniature circuit breaker (MCB) engineered to provide dependable overload and short-circuit protection in traction, railway and demanding industrial electrical installations. Part of the ABB System pro M Compact S200MT series, it is specifically designed for rolling stock, infrastructure and industrial applications where high reliability and robust performance are essential.
With a 63 A rated current and a K tripping characteristic, the S203MT-K63H01 is ideally suited to circuits supplying motors, transformers and other inductive loads with high inrush currents. Its 3-pole configuration provides coordinated protection across three-phase systems while reducing nuisance tripping during equipment start-up.
The ABB S203MT-K63H01 features a compact modular design, DIN rail mounting and secure screw terminals for straightforward installation within control panels, switchboards and railway electrical cabinets. Designed for demanding operating environments, it delivers reliable protection while remaining compatible with ABB System pro M Compact accessories.
Miniature circuit breakers such as the ABB S203MT-K63H01 automatically disconnect electrical circuits when overload or short-circuit conditions occur. This helps protect cables, connected equipment and electrical installations while supporting safe and reliable operation.
Its K characteristic is specifically intended for inductive loads with higher starting currents, reducing unnecessary tripping while maintaining dependable protection for motors, transformers and industrial machinery commonly found in railway and traction applications.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K63H01 |
| Manufacturer part number | 2CDO273006R0607 |
| Product type | Miniature circuit breaker |
| Rated current | 63 A |
| Tripping characteristic | K |
| Number of poles | 3P |
| Rated operational voltage | 400 / 440 V AC |
| Rated insulation voltage | 440 V |
| Rated 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 | 7.5 kA |
| Rated impulse withstand voltage | 4 kV |
| Current limiting class | 3 |
| Terminal type | Screw terminals |
| Mounting type | DIN rail TH35 |
| Protection rating | IP20 |
| Operating temperature | -40 to +70 °C |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.375 kg |
The ABB S203MT-K63H01 protects three-phase electrical circuits against overloads and short circuits in railway, traction and industrial installations.
This miniature circuit breaker has a rated current of 63 A.
The K characteristic is designed for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive equipment.
The ABB S203MT-K63H01 has a 3-pole configuration, providing coordinated protection for three-phase electrical circuits.
The breaker is designed for standard DIN rail mounting inside electrical distribution boards, railway cabinets and industrial control panels.
ABB S200MT miniature circuit breakers are trusted by railway manufacturers, panel builders and industrial engineers for dependable protection in demanding electrical installations.
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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...