ABB S203M-Z3NA 3P+N miniature circuit breaker with 3 A rated current, Z curve tripping characteristic and 10 kA breaking capacity for sensitive circuit protection.
£184.09
The ABB S203M-Z3NA is a compact and reliable 4-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200M series. Designed to protect electrical circuits against overloads and short circuits, it is suitable for professional installations where dependable low-current protection and fast fault response are required.
This miniature circuit breaker 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 very sensitive magnetic tripping, making it suitable for protection of electronic equipment, control circuits and applications where rapid disconnection at low fault currents is important.
With a 3 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203M-Z3NA provides professional-grade circuit protection for three-phase systems with neutral switching. Its DIN rail mounting format allows efficient installation in control panels, distribution boards and automation enclosures.
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203M-Z3NA combines thermal and magnetic tripping to help protect wiring, components and connected equipment from electrical faults.
The Z curve characteristic is designed for applications requiring fast operation at lower fault currents. This makes the S203M-Z3NA well suited to sensitive circuits, electronic loads, measuring circuits and control systems where rapid disconnection helps reduce the risk of equipment damage.
| Current | 3 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-Z3NA |
| Product ID | 2CDS273103R0318 |
| EAN | 4016779601511 |
| 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 |
| Built-in depth | approx. 69 mm |
| Width | 4 modular spacings |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-Z3NA is used to protect low-current three-phase circuits with neutral against overloads and short circuits.
The ABB S203M-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 S203M-Z3NA has a 3P+N configuration, with three protected poles and neutral switching.
The ABB S203M-Z3NA is designed for standard DIN rail mounting in distribution boards, control panels and machine cabinets.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, electrical contractors and industrial engineers for reliable protection, compact installation and long-term performance in modern 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...