ABB S203MT-K1H01 three-pole miniature circuit breaker with a 1 A rated current, K curve tripping characteristic and 10 kA short-circuit breaking capacity for industrial, traction and commercial circuit protection.
The ABB S203MT-K1H01 is a specialist three-pole miniature circuit breaker (MCB) from the robust ABB System pro M compact S200MT series. It is designed to deliver dependable overcurrent protection for demanding industrial, railway, traction and control panel applications where compact installation and reliable circuit protection are essential.
Featuring a K curve tripping characteristic and a 1 A rated current, the S203MT-K1H01 is suitable for low-current circuits with inductive loads or higher inrush currents. It helps protect electrical wiring and connected equipment against overloads and short-circuit faults while reducing the risk of nuisance tripping during normal energisation.
The ABB S203MT-K1H01 is designed for standard DIN rail mounting inside distribution boards, switchboards and industrial control panels. Its compact three-pole construction, current-limiting design and compatibility with ABB System pro M accessories make it a practical choice for professional electrical installations.
The ABB S203MT-K1H01 uses thermal and magnetic tripping mechanisms to protect electrical circuits against overload and short-circuit conditions. The thermal trip responds to sustained overloads, while the magnetic trip provides rapid disconnection during short-circuit faults.
Its K curve characteristic is designed for circuits where inductive loads and inrush currents are present. This makes it suitable for control transformers, coils, motors, power supplies and auxiliary circuits where reliable protection and stable operation are required.
| Current | 1 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200MT |
| Model | S203MT-K1H01 |
| Product ID | 2CDO273006R0159 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 1 A |
| Number of poles | 3 |
| Tripping characteristic | K |
| Rated operational voltage | 400 V AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.36 kg |
The ABB S203MT-K1H01 is used to protect three-pole low-current electrical circuits against overloads and short circuits in industrial, railway, traction and OEM applications.
A K curve miniature circuit breaker is designed for circuits with inductive loads and higher inrush currents, such as transformers, coils, motors and power supplies.
The ABB S203MT-K1H01 has a 1 A rated current.
This model is a three-pole (3P) miniature circuit breaker.
The device is designed for standard DIN rail mounting inside electrical distribution boards, switchboards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, railway specialists, panel builders and industrial engineers for dependable circuit protection, compact installation and reliable long-term performance.
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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...