ABB S203-Z63NA System pro M compact 3P+N miniature circuit breaker with 63 A rated current, Z characteristic and 6 kA breaking capacity for industrial, commercial and automation applications.
£284.68
The ABB S203-Z63NA is a high-performance 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200 series. Designed to provide dependable protection against overloads and short circuits, this MCB is ideal for commercial, industrial and specialist electrical installations requiring a Z characteristic tripping curve for highly sensitive loads.
Featuring ABB's proven thermal and electromechanical tripping technology, the S203-Z63NA delivers fast, reliable circuit protection while maintaining excellent current limiting performance. The compact DIN rail mounted design simplifies installation and supports the addition of auxiliary accessories for increased functionality.
With a 63 A rated current, 3 protected poles plus switched neutral, and a 6 kA breaking capacity, the ABB S203-Z63NA is suitable for protecting sensitive electronic equipment, control circuits and industrial systems where rapid magnetic tripping is essential.
The ABB S203-Z63NA combines delayed thermal overload protection with rapid electromechanical short-circuit protection, helping to safeguard electrical installations against faults while reducing damage caused by excessive fault currents.
Its Z characteristic makes it particularly suitable for circuits supplying sensitive electronic equipment, control systems and specialised industrial applications where lower magnetic trip thresholds are required compared with conventional B, C or D curve circuit breakers.
| Current | 63 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200 |
| Model | S203-Z63NA |
| Product ID | 2CDS253103R0608 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Rated operational voltage | Up to 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated breaking capacity | 6 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 |
| Mechanical endurance | 20,000 operations |
| Electrical endurance | 10,000 operations |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-Z63NA protects three-phase electrical circuits against overloads and short circuits while providing a switched neutral for enhanced system safety.
The Z characteristic provides a very fast magnetic trip response, making it suitable for protecting sensitive electronic equipment and control circuits.
The ABB S203-Z63NA has a rated current of 63 A.
Yes. The breaker is compatible with ABB auxiliary contacts, shunt trips, undervoltage releases and other System pro M compact accessories.
It is designed for DIN rail mounting inside distribution boards, control panels and industrial electrical cabinets.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, electrical contractors and industrial engineers for delivering dependable circuit protection, high quality construction and long-term reliability across demanding 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...