ABB S203-Z0.5NA three-pole plus switched neutral miniature circuit breaker with 0.5 A rated current, Z curve tripping characteristic and 6 kA breaking capacity for sensitive industrial electrical installations.
£213.67
The ABB S203-Z0.5NA is a premium three-pole plus switched neutral (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, it is ideal for industrial control systems, instrumentation circuits and highly sensitive electronic equipment requiring precise fault protection.
Featuring a Z curve tripping characteristic and a 0.5 A rated current, the S203-Z0.5NA is specifically developed for protecting sensitive electronic devices and semiconductor circuits where rapid fault disconnection is essential. Its advanced current limiting technology helps reduce fault energy whilst protecting valuable equipment and improving overall system reliability.
Manufactured to ABB's exacting quality standards, the S203-Z0.5NA offers excellent mechanical durability, dependable switching performance and compatibility with ABB's comprehensive range of System pro M Compact accessories, making it an ideal solution for demanding industrial and commercial electrical installations.
The ABB S203-Z0.5NA combines thermal overload protection with an extremely sensitive magnetic short circuit trip to safeguard delicate electronic circuits. Its Z curve characteristic enables rapid disconnection under low fault currents, making it particularly suitable for semiconductor devices, PLC systems and instrumentation equipment.
The integrated switched neutral enables simultaneous switching of the neutral conductor alongside the three live phases, making this breaker suitable for industrial control panels, automation systems and specialist electrical installations.
| Current | 0.5 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-Z0.5NA |
| Product ID | 2CDS253103R0158 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 0.5 A |
| Tripping characteristic | Z Curve |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Maximum operating voltage | 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short circuit breaking capacity | 6 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 70 × 69 mm |
| Weight | Approx. 0.50 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-Z0.5NA protects sensitive three-phase electrical and electronic circuits with a switched neutral against overloads and short circuits.
A Z curve miniature circuit breaker provides a highly sensitive magnetic trip, making it ideal for protecting semiconductor devices, PLCs and sensitive electronic equipment.
The ABB S203-Z0.5NA has a 0.5 A rated current.
3P+N indicates three protected phase poles together with an additional switched neutral pole, allowing all conductors to be switched simultaneously.
The breaker is designed for standard DIN rail mounting inside electrical distribution boards and industrial control panels.
ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for dependable circuit protection, long service life and reliable performance.
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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...