ABB S203MT-K2H01 three pole 2A K characteristic miniature circuit breaker designed for railway, industrial and automation applications with 10 kA breaking capacity.
The ABB S203MT-K2H01 is a high performance 3-pole miniature circuit breaker (MCB) developed for demanding railway, rolling stock and industrial electrical protection applications. Part of the trusted ABB S200MT series, this circuit breaker provides dependable overload and short circuit protection whilst meeting the stringent requirements of traction and transport systems.
Designed with a K characteristic tripping curve, the S203MT-K2H01 offers reliable protection for circuits with higher inrush currents, making it suitable for motors, transformers and inductive loads. Its robust thermal and electromagnetic trip mechanisms help protect electrical equipment whilst ensuring long-term operational reliability.
Featuring a 2 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-K2H01 is ideal for railway vehicles, control panels, OEM machinery and industrial distribution systems where dependable circuit protection is essential.
The ABB S200MT range has been engineered for applications where dependable circuit protection is essential. Combining thermal overload protection with instantaneous magnetic short circuit protection, the S203MT-K2H01 safeguards electrical equipment whilst helping minimise downtime and maintenance costs.
Its compact DIN rail design allows straightforward installation into switchboards and control panels, while compatibility with ABB accessories provides additional flexibility for modern electrical distribution systems.
| Current | 2 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K2H01 |
| Alternative model | S203MT-K2 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 2 A |
| Tripping characteristic | K |
| Number of poles | 3 |
| Rated voltage | Up to 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated short circuit capacity | 10 kA |
| Rated ultimate breaking capacity (Icu) | 15 kA |
| Protection rating | IP20 |
| Mounting | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.375 kg |
It provides overload and short circuit protection for three-phase electrical circuits in railway, industrial and automation applications.
The ABB S203MT-K2H01 has a 2 A rated current.
The K characteristic is designed for circuits with higher inrush currents, making it well suited to motors, transformers and inductive loads.
This model features a 3-pole (3P) configuration for three-phase circuit protection.
The circuit breaker is designed for standard DIN rail mounting inside electrical distribution boards and control panels.
ABB S200MT miniature circuit breakers are trusted by OEMs, panel builders and railway engineers for delivering dependable electrical protection in demanding industrial and transportation 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...