ABB S203-Z4NA System pro M Compact miniature circuit breaker with 3P+N configuration, 4 A rated current, Z tripping characteristic and 6 kA breaking capacity for sensitive industrial and electronic circuit protection.
£213.67
The ABB S203-Z4NA is a premium 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series, designed to provide dependable overload and short circuit protection for sensitive industrial, commercial and OEM electrical installations. Featuring a Z tripping characteristic, this breaker is specifically engineered for applications requiring extremely fast magnetic tripping, making it ideal for semiconductor devices, PLC systems, instrumentation and other sensitive electronic equipment.
Manufactured using ABB's advanced thermal and electromagnetic trip technology, the S203-Z4NA delivers reliable circuit protection with excellent current limiting performance. Its compact DIN rail mounted design enables straightforward installation within switchboards, control panels and automation systems while remaining fully compatible with ABB's comprehensive range of S200 accessories.
With a 4 A rated current, 3P+N configuration and a 6 kA breaking capacity, the ABB S203-Z4NA provides dependable protection for three-phase electrical systems requiring a switched neutral, particularly where sensitive electronic equipment requires rapid fault clearance.
The ABB S203-Z4NA automatically disconnects electrical circuits during overload and short circuit conditions, helping protect wiring, electronic equipment and sensitive control systems from damage while maintaining operational reliability.
Its Z characteristic provides a very fast magnetic trip response, making it particularly suitable for semiconductor protection, PLC systems, instrumentation, electronic controls and other applications where low fault currents must be cleared rapidly.
| Current | 4 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-Z4NA |
| Product ID | 2CDS253103R0338 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 4 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Rated operational voltage | 400 V AC |
| Maximum operational voltage | 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short circuit capacity | 6 kA |
| Energy limiting class | 3 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 70 × 69 mm |
| Weight | Approx. 0.52 kg |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-Z4NA protects sensitive three-phase electrical circuits with a neutral against overloads and short circuits.
The Z characteristic provides very fast magnetic tripping, making it ideal for protecting semiconductor devices, PLC systems and sensitive electronic equipment.
This miniature circuit breaker has a 4 A rated current.
The breaker mounts directly onto a standard 35 mm DIN rail inside switchboards, distribution boards and industrial control panels.
Yes. The ABB S200 range supports auxiliary contacts, shunt trips, undervoltage releases, signalling devices and other compatible accessories.
ABB System pro M Compact miniature circuit breakers are trusted by panel builders, automation engineers and industrial electricians for reliable circuit protection, high performance and long operational life.
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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...