ABB S203MT-Z63H01 three-pole 63 A miniature circuit breaker with Z tripping characteristic and 10 kA short circuit capacity for railway, traction and industrial electrical protection.
The ABB S203MT-Z63H01 is a robust three-pole miniature circuit breaker (MCB) designed for demanding railway, traction and industrial electrical applications. As part of the reliable ABB S200MT series, it provides dependable overload and short circuit protection for electrical circuits where fast fault disconnection and long-term operational reliability are essential.
This MCB features a Z tripping characteristic, providing highly sensitive magnetic tripping for the protection of electronic equipment, control circuits and semiconductor-based devices. Its current limiting design helps reduce fault energy, protecting downstream components and improving overall system safety.
With a 63 A rated current, three-pole configuration and 10 kA rated short circuit capacity, the S203MT-Z63H01 is suitable for DIN rail installation in electrical distribution boards, control panels and specialist transportation systems.
The ABB S203MT-Z63H01 protects electrical installations using thermal and electromagnetic tripping mechanisms. The thermal element responds to overload conditions, while the electromagnetic trip provides rapid disconnection during short circuit faults.
Its Z curve characteristic is particularly useful where sensitive components require fast protection. This makes the device suitable for control systems, electronic loads and specialist industrial equipment where excessive fault energy could damage connected components.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z63H01 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Number of poles | 3 |
| Tripping characteristic | Z |
| Rated operational voltage | 400 V AC |
| Frequency | 50 / 60 Hz |
| Rated short circuit capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.375 kg |
It is used to protect three-phase electrical circuits against overloads and short circuits, especially in railway, traction and industrial control applications.
The Z characteristic provides highly sensitive magnetic tripping, making it suitable for protecting electronic equipment, control circuits and semiconductor devices.
The ABB S203MT-Z63H01 is a three-pole miniature circuit breaker.
This miniature circuit breaker has a rated current of 63 A.
It is designed for mounting on a standard 35 mm DIN rail inside electrical distribution boards, control panels and suitable equipment enclosures.
ABB S200MT miniature circuit breakers are trusted by electrical engineers, panel builders and railway manufacturers worldwide for dependable circuit protection, compact installation and long service life 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...