ABB S203MT-Z1H01 three-pole miniature circuit breaker with a 1 A rated current, Z curve tripping characteristic and 10 kA short-circuit breaking capacity for traction, railway and industrial applications.
The ABB S203MT-Z1H01 is a specialist three-pole miniature circuit breaker (MCB) from the robust ABB System pro M compact S200MT series. It is specifically designed for traction, railway and demanding industrial applications where highly sensitive circuit protection is required. Built to IEC/EN 60898-1 and IEC/EN 60947-2 standards, it delivers dependable overload and short-circuit protection in critical electrical systems.
Featuring a Z curve tripping characteristic and a 1 A rated current, the S203MT-Z1H01 is ideal for protecting sensitive electronic equipment, PLCs, signalling systems, semiconductor devices and low-current control circuits. Its current-limiting design reduces fault energy, helping to safeguard both connected equipment and electrical wiring.
Designed for standard DIN rail mounting, the ABB S203MT-Z1H01 offers a compact three-pole construction and full compatibility with ABB System pro M compact accessories, making it an excellent solution for professional panel builders and railway engineers.
The ABB S203MT-Z1H01 combines thermal overload protection with an extremely sensitive magnetic trip mechanism. Its Z characteristic enables rapid disconnection at relatively low fault currents, making it particularly suitable for semiconductor devices, PLC inputs, signalling systems and other sensitive electronic equipment.
As part of ABB's S200MT traction range, it is engineered for reliable operation in demanding railway and industrial environments while remaining fully compatible with the System pro M compact accessory range.
| Current | 1 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200MT |
| Model | S203MT-Z1H01 |
| Product ID | 2CDO273006R0218 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 1 A |
| Number of poles | 3 |
| Tripping characteristic | Z |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Rated short-circuit capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | approx. 0.375 kg |
The ABB S203MT-Z1H01 protects sensitive three-phase electrical circuits against overloads and short circuits in railway, industrial and electronic applications.
A Z curve miniature circuit breaker provides very sensitive magnetic tripping, making it ideal for protecting electronic equipment and semiconductor devices.
The ABB S203MT-Z1H01 has a 1 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 S200MT miniature circuit breakers are trusted worldwide by railway engineers, machine builders and industrial electricians for dependable protection, compact installation and long-term reliability.
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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...