ABB S203MT-Z2H01 three pole 2A Z characteristic miniature circuit breaker designed for railway, industrial and automation applications with 10 kA breaking capacity.
The ABB S203MT-Z2H01 is a reliable 3-pole miniature circuit breaker (MCB) designed for precise overload and short circuit protection in railway, traction and industrial electrical systems. Part of the ABB S200MT miniature circuit breaker series, it is built for demanding applications where dependable circuit protection and compact DIN rail installation are essential.
With a Z characteristic tripping curve, the S203MT-Z2H01 is particularly suited to circuits requiring fast magnetic tripping at low fault current levels. This makes it ideal for protecting sensitive equipment, control circuits, electronic loads and instrumentation where rapid disconnection can help reduce the risk of equipment damage.
Featuring a 2 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-Z2H01 provides robust circuit protection for three-phase installations in control panels, transport systems, automation equipment and OEM machinery.
Miniature circuit breakers such as the ABB S203MT-Z2H01 protect electrical installations by disconnecting circuits during overload or short circuit conditions. The delayed thermal trip mechanism responds to overloads, while the electromagnetic trip mechanism reacts rapidly to short circuit faults.
The Z curve characteristic is designed for applications where quick magnetic tripping is required. This makes the S203MT-Z2H01 a suitable choice for sensitive electronic equipment, control circuits and instrumentation where lower fault currents must be detected quickly and reliably.
| Current | 2 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z2H01 |
| Alternative model | S203MT-Z2 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 2 A |
| Tripping characteristic | Z |
| Number of poles | 3 |
| Rated voltage | Up to 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated short circuit capacity | 10 kA |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.375 kg |
The ABB S203MT-Z2H01 is used to protect three-phase electrical circuits against overloads and short circuits in railway, industrial and automation applications.
This miniature circuit breaker has a 2 A rated current.
The Z characteristic provides fast magnetic tripping at low fault current levels, making it suitable for sensitive control circuits, electronics and instrumentation.
The ABB S203MT-Z2H01 has a 3-pole (3P) configuration for three-phase circuit protection.
It is designed for standard DIN rail mounting inside electrical distribution boards, control panels and machine cabinets.
ABB S200MT miniature circuit breakers are widely used by panel builders, OEMs and railway engineers for reliable protection of electrical circuits in demanding transport and industrial environments.
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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...