ABB S203MT-Z20H10 miniature circuit breaker, a 3-pole 20 A Z curve MCB with 10 kA breaking capacity for sensitive circuit protection in industrial, commercial and transport electrical systems.
The ABB S203MT-Z20H10 is a dependable miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits in demanding industrial, commercial and transport applications. As part of the ABB S200MT miniature circuit breaker range, this 3-pole device is suited to installations requiring reliable circuit protection and fast disconnection under fault conditions.
With a 20 A rated current and Z-type tripping characteristic, the S203MT-Z20H10 provides sensitive magnetic tripping for circuits where rapid short-circuit protection is required. This makes it suitable for control circuits, signalling equipment and specialist electrical systems where sensitive fault response is important.
The ABB S203MT-Z20H10 features a compact DIN rail mounting format, robust current-limiting performance and a 10 kA rated short-circuit capacity. Its modular 3-pole design supports straightforward installation inside electrical cabinets, distribution boards and control panels.
Miniature circuit breakers such as the ABB S203MT-Z20H10 automatically disconnect electrical circuits when overload or short-circuit faults occur. This helps protect cables, connected loads and downstream components from excessive current and fault energy.
The Z curve characteristic provides fast magnetic tripping sensitivity, making this MCB suitable for circuits that require rapid fault disconnection. Its 3-pole configuration allows simultaneous protection and isolation of three-phase circuits in control panels, distribution boards and specialist electrical installations.
| Current | 20 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z20H10 |
| MPN | 2CDV273006R0488 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Rated current | 20 A |
| Tripping characteristic | Z curve |
| Rated short-circuit capacity | 10 kA |
| Rated operational voltage | up to 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Product range | System pro M compact |
The ABB S203MT-Z20H10 is used to protect three-phase electrical circuits against overloads and short circuits.
This miniature circuit breaker has a rated current of 20 A.
The Z curve provides sensitive short-circuit tripping, making the MCB suitable for circuits requiring fast magnetic protection.
The ABB S203MT-Z20H10 is a 3-pole miniature circuit breaker.
It is typically installed on DIN rail inside electrical cabinets, control panels and distribution boards.
ABB S200MT miniature circuit breakers are used by panel builders, electrical engineers and transport specialists to deliver dependable circuit protection in demanding industrial, commercial and railway applications.
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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...