ABB S203MT-K50H10 miniature circuit breaker featuring 3 poles, 50 A rated current, K curve tripping characteristic and 10 kA breaking capacity for industrial, commercial and railway electrical protection.
The ABB S203MT-K50H10 is a high-performance miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in demanding electrical installations. As part of the ABB S200MT miniature circuit breaker range, this 3-pole device is specifically developed for railway, industrial and commercial applications where reliable circuit protection is essential.
Featuring a 50 A rated current and a K-type tripping characteristic, the S203MT-K50H10 is ideal for protecting circuits supplying motors, transformers and other inductive loads with higher inrush currents. Its current-limiting design and dual thermal and electromagnetic tripping mechanisms ensure dependable protection while helping minimise damage during fault conditions.
The ABB S203MT-K50H10 incorporates a compact DIN rail mounting design, a 10 kA rated short-circuit capacity and compatibility with ABB System pro M compact accessories, making it suitable for installation within electrical cabinets, distribution boards and industrial control panels.
Miniature circuit breakers such as the ABB S203MT-K50H10 automatically disconnect electrical circuits when overload or short-circuit faults occur. This protects cables, motors, transformers and connected equipment while improving operational reliability and reducing downtime.
The K curve characteristic makes this MCB particularly suitable for applications with higher starting currents. Combined with ABB's proven current-limiting technology, it delivers dependable protection for industrial machinery, railway systems and commercial electrical installations.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K50H10 |
| MPN | 2CDV273006R0577 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Rated current | 50 A |
| Tripping characteristic | K curve |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated short-circuit capacity | 10 kA |
| Rated frequency | 50 / 60 Hz |
| Energy limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.375 kg |
The ABB S203MT-K50H10 protects three-phase electrical circuits against overloads and short circuits in industrial, railway and commercial applications.
This miniature circuit breaker has a rated current of 50 A.
The K curve is designed for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive loads.
The ABB S203MT-K50H10 is a 3-pole miniature circuit breaker.
It is designed for DIN rail mounting inside electrical cabinets, distribution boards and industrial control panels.
ABB S200MT miniature circuit breakers are trusted by electrical engineers, panel builders and machine manufacturers to deliver reliable circuit protection in demanding industrial, railway and commercial environments.
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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...