ABB S203MT-K0.5H01 three-pole miniature circuit breaker with a 0.5 A rated current, K curve tripping characteristic and 10 kA short-circuit breaking capacity for industrial and commercial circuit protection.
The ABB S203MT-K0.5H01 is a specialist three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M series. It is designed to provide dependable overcurrent protection for demanding electrical installations, including industrial control panels, machine building and traction-related applications.
Featuring a K curve tripping characteristic and a 0.5 A rated current, the S203MT-K0.5H01 is suitable for low-current circuits where controlled tolerance of inrush current is required. Its current-limiting design helps protect wiring and connected equipment from overloads and short-circuit faults.
The ABB S203MT-K0.5H01 is designed for DIN rail mounting inside electrical distribution boards, switchboards and control panels. Its compact three-pole construction, robust performance and compatibility with ABB System pro M accessories make it a practical choice for professional electrical installations.
The ABB S203MT-K0.5H01 uses thermal and magnetic tripping mechanisms to protect electrical circuits from overload and short-circuit conditions. The delayed thermal trip responds to sustained overloads, while the magnetic trip provides rapid disconnection during short-circuit faults.
Its K curve characteristic makes it useful for circuits where inrush current must be accommodated without unnecessary tripping. This helps maintain reliable operation while still providing effective protection for cables, control circuits and connected electrical equipment.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203MT-K0.5H01 |
| Product ID | 2CDO273006R0157 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 0.5 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-K0.5H01 is used to protect three-pole low-current electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.
A K curve miniature circuit breaker is designed for circuits with higher inrush currents than standard loads, making it suitable for inductive and control circuit applications.
The ABB S203MT-K0.5H01 has a 0.5 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 widely specified by panel builders, electrical contractors and industrial engineers for dependable circuit protection, compact installation and reliable performance in demanding 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...