ABB S203MT-Z20H01 miniature circuit breaker from the S200MT series featuring a 20 A rated current, Z tripping characteristic, 3-pole configuration and 10 kA breaking capacity for traction and industrial applications.
£108.33
The ABB S203MT-Z20H01 is a specialist miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for traction, railway and demanding industrial electrical installations. As part of the ABB System pro M Compact S200MT series, it delivers dependable protection, high breaking capacity and long service life in applications where operational reliability is critical.
Featuring a 20 A rated current and a Z tripping characteristic, the S203MT-Z20H01 is ideal for protecting sensitive circuits that require rapid magnetic tripping. Its 3-pole configuration makes it suitable for three-phase systems used throughout railway vehicles, industrial control equipment and specialist machinery.
Designed for DIN rail mounting, the ABB S203MT-Z20H01 combines compact dimensions with a robust construction, making it easy to install inside distribution boards, control panels and railway electrical cabinets while delivering dependable protection against overloads and short circuits.
Miniature circuit breakers such as the ABB S203MT-Z20H01 automatically disconnect electrical circuits during overload or short-circuit conditions. This helps protect wiring, connected equipment and control systems while improving operational safety.
The Z characteristic provides rapid magnetic tripping at relatively low fault currents, making this breaker particularly suitable for protecting sensitive electronic equipment, signalling systems and specialist railway applications where fast fault clearance is essential.
| Current | 20 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z20H01 |
| Manufacturer part number | 2CDO273006R0488 |
| EAN | 4016779770781 |
| Product type | Miniature circuit breaker |
| Rated current | 20 A |
| Tripping characteristic | Z |
| Number of poles | 3P |
| Rated operational voltage | 400 / 440 V AC |
| Rated insulation voltage | 440 V |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Rated ultimate short-circuit breaking capacity | 15 kA |
| Rated service short-circuit breaking capacity | 11.25 kA |
| Rated impulse withstand voltage | 4 kV |
| Current limiting class | 3 |
| Terminal type | Screw terminals |
| Mounting type | DIN rail TH35 |
| Protection rating | IP20 |
| Operating temperature | -40 to +70 °C |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.38 kg |
The ABB S203MT-Z20H01 protects three-phase electrical circuits against overloads and short circuits, particularly in railway, traction and industrial applications requiring rapid fault protection.
This miniature circuit breaker has a rated current of 20 A.
A Z characteristic breaker provides very fast magnetic tripping, making it suitable for protecting sensitive circuits and electronic equipment.
The ABB S203MT-Z20H01 has a 3-pole configuration, providing coordinated protection for three-phase electrical systems.
The breaker is designed for standard DIN rail mounting inside electrical distribution boards, control panels and railway cabinets.
ABB S200MT miniature circuit breakers are trusted by railway manufacturers, panel builders and industrial engineers for dependable protection in demanding electrical installations.
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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...