ABB S203P-Z4NA System pro M compact S200P miniature circuit breaker with 3P+N configuration, 4 A rated current, Z tripping characteristic and 25 kA breaking capacity for sensitive industrial and commercial electrical protection.
The ABB S203P-Z4NA 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, it is ideally suited to industrial automation, OEM machinery, commercial switchboards and sensitive electrical installations where rapid fault protection is essential.
Featuring a Z tripping characteristic and a 4 A rated current, the S203P-Z4NA is specifically developed for protecting sensitive electronic equipment, PLC systems, instrumentation and semiconductor devices. Its advanced current-limiting construction helps minimise fault energy, reducing the risk of damage to valuable electrical components while maintaining reliable system operation.
With a 3P+N configuration and a 25 kA ultimate short circuit breaking capacity, the S203P-Z4NA delivers outstanding protection for demanding three-phase electrical installations. Its compact DIN rail mounted design allows simple installation while remaining fully compatible with ABB's extensive range of modular accessories. It has now been superseded by replacement part 2CDS383103R0338, making it an ideal direct replacement reference where existing installations require maintenance or expansion.
The ABB S203P-Z4NA combines delayed thermal overload protection with rapid electromagnetic short circuit protection to safeguard sensitive electrical installations. Its current-limiting construction helps minimise the energy released during fault conditions, reducing stress on cables, switchgear and connected electronic equipment.
The Z curve characteristic is intended for applications requiring rapid tripping at relatively low fault currents. This makes the S203P-Z4NA particularly suitable for instrumentation, PLC systems, semiconductor protection, control circuits and other sensitive industrial electronics.
| Current | 4 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-Z4NA |
| Product ID | 2CDS283103R0338 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 4 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Rated ultimate short circuit breaking capacity (Icu) | 25 kA |
| Rated service short circuit breaking capacity (Ics) | 12.5 kA |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
The S203P-Z4NA protects sensitive three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.
This miniature circuit breaker has a 4 A rated current.
A Z curve MCB provides rapid tripping at relatively low fault currents, making it suitable for sensitive electronic equipment, instrumentation and semiconductor protection.
The S203P-Z4NA is a 3P+N device with three protected poles and a switched neutral.
The S203P-Z4NA has been superseded by ABB replacement part 2CDS383103R0338, which provides a direct replacement for new installations and maintenance requirements.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, electrical contractors and industrial engineers for delivering dependable circuit protection, high fault performance and long-term reliability in demanding electrical 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...