ABB S203MT-Z3NA 3P+N miniature circuit breaker with 3 A rated current, Z curve tripping characteristic and 10 kA breaking capacity for railway, control and sensitive circuit protection.
£344.56
The ABB S203MT-Z3NA is a compact 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200MT series. Designed especially for traction, railway and demanding industrial applications, it provides reliable protection against overloads and short circuits in electrical systems where dependable low-current protection is essential.
The S200MT range uses ABB's current-limiting technology with a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its Z curve characteristic provides sensitive magnetic tripping, making it suitable for control circuits, electronic equipment, instrumentation and applications requiring fast disconnection at lower fault currents.
With a 3 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203MT-Z3NA is ideal for protecting low-current three-phase circuits with neutral switching. Its compact DIN rail design supports efficient installation in railway electrical enclosures, control panels, distribution boards and OEM machinery.
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203MT-Z3NA combines thermal and magnetic tripping performance to help protect cables, sensitive components and connected equipment from electrical faults.
The Z curve characteristic is designed for applications requiring rapid response at lower fault current levels. This makes the S203MT-Z3NA well suited to control systems, electronic equipment, measuring circuits and railway auxiliary systems where sensitive protection is required.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200MT |
| Model | S203MT-Z3NA |
| Product ID | 2CDS273106R0318 |
| EAN | 4016779771634 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 3 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.50 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MT-Z3NA is used to protect low-current three-phase circuits with neutral against overloads and short circuits.
The ABB S203MT-Z3NA has a 3 A rated current.
A Z curve breaker provides sensitive magnetic tripping, making it suitable for electronic equipment, control circuits and applications requiring rapid disconnection at lower fault currents.
The S203MT-Z3NA has a 3P+N configuration, with three protected poles and a switched neutral.
The ABB S203MT-Z3NA is designed for standard DIN rail mounting inside distribution boards, control panels and railway electrical enclosures.
ABB System pro M compact S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electricians for reliable protection, compact installation and dependable performance in demanding electrical systems.
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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...