ABB S203-Z20 three-pole 20 A Z curve miniature circuit breaker from the System pro M Compact S200 range for protecting sensitive electrical and electronic circuits against overloads and short circuits.
£136.28
The ABB S203-Z20 is a premium three-pole miniature circuit breaker (MCB) from the proven ABB System pro M Compact S200 series. Designed to provide dependable protection against overloads and short circuits, it is ideally suited to industrial automation, control panels and sensitive electronic equipment where fast fault protection is required.
Featuring a Z tripping characteristic, the S203-Z20 is specifically engineered for applications requiring rapid magnetic tripping, making it ideal for protecting PLCs, instrumentation, semiconductor devices and other sensitive electronic circuits. Its precision thermal and magnetic tripping mechanisms deliver reliable protection while reducing the risk of damage during fault conditions.
With a 20 A rated current, three protected poles and a 6 kA breaking capacity, the ABB S203-Z20 provides compact, reliable circuit protection for commercial, industrial and OEM electrical installations while remaining fully compatible with ABB System pro M Compact accessories.
The ABB S203-Z20 automatically disconnects electrical circuits during overload and short circuit conditions, helping to protect valuable electronic equipment and minimise downtime. Its Z characteristic provides rapid magnetic tripping, making it particularly suitable for sensitive automation and control systems.
Manufactured to recognised international standards, the S203-Z20 delivers dependable long-term performance, excellent electrical endurance and straightforward installation within modern electrical distribution boards and industrial control panels.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-Z20 |
| Manufacturer Part Number | 2CDS253001R0488 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Number of poles | 3P |
| Tripping characteristic | Z |
| Rated operational voltage | Up to 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 × 52.5 × 69 mm |
| Weight | Approx. 0.345 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-Z20 protects three-phase electrical circuits against overloads and short circuits, particularly where sensitive electronic equipment requires rapid fault protection.
The Z characteristic provides fast magnetic tripping, making it suitable for protecting PLCs, instrumentation and sensitive electronic equipment.
The ABB S203-Z20 is a three-pole (3P) miniature circuit breaker.
This miniature circuit breaker has a 20 A rated current.
The breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M Compact miniature circuit breakers are trusted worldwide by panel builders, OEMs and electrical engineers for dependable circuit protection, outstanding reliability and long operational life.
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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...