ABB S203M-Z8NA miniature circuit breaker from the System pro M compact S200M series, rated at 8 A with Z curve tripping characteristic and 3P+N configuration for sensitive low-voltage circuit protection.
£184.09
The ABB S203M-Z8NA is a high-performance miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the trusted ABB System pro M compact S200M series, this device provides dependable circuit protection for residential, commercial and industrial low-voltage installations.
This 8 amp Z-curve circuit breaker combines thermal overload protection with electromechanical short-circuit tripping, helping to safeguard cables, equipment and sensitive electrical circuits. Its compact DIN rail format and current-limiting design support safe, efficient installation within modern electrical panels.
With a rated current of 8 A and a 3P+N configuration, the S203M-Z8NA is suitable for three-phase circuits requiring neutral switching. The Z tripping characteristic provides enhanced sensitivity for circuits with very low fault current requirements, making it ideal for protecting sensitive electronic equipment and control circuits.
Miniature circuit breakers such as the ABB S203M-Z8NA are used to protect electrical installations by automatically disconnecting a circuit when excessive current is detected. This helps prevent cable damage, equipment failure and electrical hazards caused by overloads or short circuits.
The Z curve characteristic provides fast and sensitive tripping, making this MCB suitable for applications where connected equipment requires enhanced protection. The S200M series is widely used by panel builders, contractors and industrial engineers who need dependable circuit protection in compact DIN rail assemblies.
| Current | 8 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-Z8NA |
| Product type | Miniature circuit breaker |
| Manufacturer part number | 2CDS273103R0408 |
| EAN | 4016779601542 |
| Rated current | 8 A |
| Tripping characteristic | Z curve |
| Number of poles | 3P+N |
| Rated operational voltage | 400 V AC |
| Rated breaking capacity | 10 kA at 230/400 V AC |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
| Degree of protection | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.5 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-Z8NA is used to protect low-voltage electrical circuits against overloads and short circuits, particularly where sensitive Z curve protection is required.
This miniature circuit breaker has a rated current of 8 A.
The Z curve tripping characteristic provides highly sensitive short-circuit protection, making it suitable for sensitive electronic equipment, control circuits and applications with low fault current requirements.
The S203M-Z8NA has a 3P+N configuration, making it suitable for three-phase circuits with neutral switching.
It is typically installed on DIN rail inside electrical distribution boards, control panels and industrial enclosures.
ABB System pro M compact miniature circuit breakers are widely used by panel builders, electrical contractors and industrial engineers for reliable circuit protection in modern low-voltage installations.
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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...