ABB S203P-Z0.5NA miniature circuit breaker from the System pro M compact S200P range featuring a 3+N pole configuration, Z curve tripping characteristic, 0.5 A rated current and 25 kA breaking capacity for sensitive low-current circuit protection.
The ABB S203P-Z0.5NA is a high-performance miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide precise overload and short-circuit protection for commercial, industrial and OEM electrical installations. Featuring a Z curve tripping characteristic and a 0.5 A rated current, it is ideal for highly sensitive control circuits, instrumentation, electronic equipment and low-current auxiliary systems.
The ABB S200P range uses current-limiting technology with separate thermal and electromagnetic tripping mechanisms. The delayed thermal mechanism provides overload protection, while the electromechanical mechanism responds rapidly to short-circuit faults, helping protect wiring, switchgear and sensitive connected equipment.
With a 3+N pole configuration, 400 V AC rated voltage and a high 25 kA short-circuit breaking capacity, the ABB S203P-Z0.5NA provides dependable circuit protection in demanding electrical environments. Its compact DIN rail mounted format makes it suitable for installation in distribution boards, control panels and OEM electrical assemblies.
The ABB S203P-Z0.5NA automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping prevent damage to cables, electronic devices and sensitive control equipment. Its Z curve characteristic is designed for applications requiring very fast magnetic tripping at relatively low fault current levels.
The ABB S200P range is widely specified by panel builders, machine manufacturers and electrical contractors thanks to its compact construction, high fault capacity and compliance with recognised international standards.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-Z0.5NA |
| Product ID | 2CDS283103R0158 |
| EAN | 4016779594219 |
| Product type | Miniature circuit breaker |
| Rated current | 0.5 A |
| Release characteristic | Z curve |
| Number of poles | 3+N |
| Number of protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Voltage type | AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 25 kA |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| 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 ABB S203P-Z0.5NA protects three-phase plus neutral circuits against overloads and short circuits, particularly in sensitive low-current control and instrumentation applications.
This miniature circuit breaker has a rated current of 0.5 A.
A Z curve MCB provides fast magnetic tripping at relatively low fault current levels, making it suitable for sensitive electronic and control circuits.
The S203P-Z0.5NA features a 3+N pole configuration, providing protection on three poles with a neutral connection.
It is designed for installation on DIN rail inside distribution boards, industrial control panels and OEM electrical assemblies.
ABB System pro M compact S200P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM machine manufacturers for dependable circuit protection across commercial and industrial 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...