ABB S203MT-Z4H10 three-pole miniature circuit breaker with 4 A rated current and Z curve tripping characteristic for reliable overload and fast short-circuit protection in industrial and railway applications.
The ABB S203MT-Z4H10 is a specialist three-pole miniature circuit breaker from the ABB System pro M compact S200MT series, designed for dependable circuit protection in demanding industrial, traction and railway applications. With a 4 A rated current and a Z-curve tripping characteristic, it is suitable for sensitive low-current circuits requiring fast magnetic response to short-circuit conditions.
The S200MT range is engineered for environments where compact installation, reliable operation and robust overcurrent protection are essential. Its current-limiting construction helps reduce fault energy, while separate thermal and electromechanical tripping mechanisms provide effective protection against overloads and short circuits.
With a three-pole configuration, compact modular construction and DIN rail mounting, the S203MT-Z4H10 is well suited for control panels, rolling stock systems, automation equipment and sensitive three-phase protection circuits.
The ABB S203MT-Z4H10 automatically disconnects electrical circuits during overload or short-circuit conditions, helping protect wiring, control equipment and connected devices. Its Z-curve characteristic provides fast magnetic tripping, making it suitable for sensitive circuits where rapid disconnection is required.
Designed for traction and railway installations, the S200MT range also delivers dependable protection in industrial automation, OEM machinery and commercial electrical systems where compact, high-performance protection devices are required.
| Current | 4 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200MT |
| Model | S203MT-Z4H10 |
| Product ID | 2CDV273006R0338 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Rated current | 4 A |
| Tripping characteristic | Z curve |
| Rated operational voltage | 230 / 400 V AC |
| Maximum rated voltage | 440 V AC |
| Rated short-circuit capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Energy limiting class | 3 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Protection rating | IP20 |
| Application | Sensitive low-current three-phase circuit protection |
The ABB S203MT-Z4H10 protects low-current three-phase electrical circuits against overloads and short circuits in industrial, railway and traction applications.
The circuit breaker has a rated current of 4 A.
The Z-curve characteristic provides fast magnetic tripping for sensitive circuits where rapid disconnection during short-circuit conditions is required.
The ABB S203MT-Z4H10 is a three-pole miniature circuit breaker for three-phase circuit protection.
The breaker is designed for installation onto a standard 35 mm DIN rail inside electrical panels, switchboards and control cabinets.
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial professionals for dependable low voltage circuit protection in demanding environments.
● 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...