ABB S203P-Z63NA System pro M compact miniature circuit breaker featuring a 3P+N configuration, 63 A rated current and Z curve characteristic for sensitive industrial circuit protection.
The ABB S203P-Z63NA is a premium 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide dependable overload and short circuit protection for commercial and industrial electrical installations. Built with ABB's proven current limiting technology, it delivers reliable protection while helping minimise damage caused by electrical faults.
Featuring a Z tripping characteristic, the S203P-Z63NA is intended for applications requiring highly sensitive magnetic tripping, making it particularly suitable for protecting electronic equipment, control circuits and specialist industrial systems where fast fault clearance is essential.
With a 63 A rated current, 3P+N configuration and a breaking capacity of up to 25 kA, this DIN rail mounted circuit breaker provides outstanding protection for modern switchboards, distribution systems and industrial control panels. It also supports ABB's extensive range of modular accessories for enhanced system functionality.
The ABB S203P-Z63NA combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical installations. Its Z characteristic provides a lower magnetic trip threshold than standard B, C or D curves, making it ideal for protecting sensitive electronic equipment and specialist control systems.
As part of ABB's renowned System pro M compact range, the S203P-Z63NA offers long service life, dependable operation and compatibility with auxiliary contacts, shunt trips, undervoltage releases and other modular accessories, making it suitable for modern industrial power distribution systems.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-Z63NA |
| Product ID | 2CDS283103R0608 |
| EAN | 4016779594363 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 63 A |
| Poles | 3P+N |
| Protected poles | 3 |
| Trip characteristic | Z Curve |
| Rated operational voltage | Up to 440 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | 88 × 70 × 69 mm |
| Approximate weight | 0.56 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235 |
The S203P-Z63NA protects three-phase electrical circuits against overloads and short circuits where sensitive magnetic tripping is required.
The Z curve provides very sensitive magnetic tripping, making it suitable for protecting electronic equipment, control circuits and specialist applications with relatively low fault currents.
This model features a 3P+N configuration, providing protection for three phases together with a switched neutral.
Yes. The ABB S200P range supports auxiliary contacts, signal contacts, shunt trips, undervoltage releases and other modular accessories.
Yes. The S203P-Z63NA is designed for quick installation onto standard DIN rails used in industrial control panels and switchboards.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, OEM manufacturers and electrical engineers for dependable circuit protection, high quality construction and reliable performance in demanding industrial environments.
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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...