ABB S203MT-K40H10 miniature circuit breaker featuring 3 poles, 40 A rated current, K curve tripping characteristic and 10 kA breaking capacity for industrial, commercial and railway electrical protection.
The ABB S203MT-K40H10 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 engineered for industrial, commercial and railway applications where reliable circuit protection is essential.
With a 40 A rated current and a K-type tripping characteristic, the S203MT-K40H10 is ideal for protecting motors, transformers and other inductive loads with higher inrush currents. Its current-limiting design and thermal and magnetic tripping mechanisms help minimise equipment damage while maintaining reliable system operation.
The ABB S203MT-K40H10 features a compact DIN rail mounting design, a 10 kA rated short-circuit capacity and robust modular construction, making it suitable for installation inside control panels, electrical cabinets and distribution boards.
Miniature circuit breakers such as the ABB S203MT-K40H10 automatically disconnect electrical circuits when overload or short-circuit faults occur. This helps protect cables, motors, transformers and connected equipment while improving overall system reliability and reducing downtime.
The K curve characteristic is designed for applications with higher starting currents, making this MCB particularly suitable for industrial machinery, motor circuits and railway electrical systems. Its robust construction and proven ABB design deliver long-term dependable protection.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K40H10 |
| MPN | 2CDV273006R0557 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Rated current | 40 A |
| Tripping characteristic | K curve |
| Rated short-circuit capacity | 10 kA |
| Rated operational voltage | Up to 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | Approx. 88 × 52.5 × 69 mm |
| Weight | Approx. 0.375 kg |
The ABB S203MT-K40H10 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 40 A.
The K curve is intended for circuits with higher inrush currents, making it ideal for motors, transformers and other inductive loads.
The ABB S203MT-K40H10 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 for delivering dependable circuit protection in demanding industrial, railway and commercial applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...