ABB S203M-Z50 three-pole 50 A miniature circuit breaker with Z tripping characteristic and 10 kA breaking capacity for sensitive industrial, commercial and panel building applications.
£188.55
The ABB S203M-Z50 is a high performance three-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in industrial, commercial and panel building applications. As part of the ABB S200M System pro M compact series, it delivers dependable circuit protection in a compact DIN rail mounted format.
This MCB features a Z tripping characteristic, making it suitable for sensitive electrical and electronic circuits where rapid magnetic tripping is required. It is commonly used for control panels, PLC systems, instrumentation, electronics and other applications with low inrush currents where fast fault disconnection is important.
With a 50 A rated current, three-pole configuration and 10 kA short-circuit breaking capacity, the ABB S203M-Z50 provides robust protection for three-phase distribution systems, automation equipment and sensitive industrial control applications.
Miniature circuit breakers such as the ABB S203M-Z50 automatically disconnect the electrical supply when overload or short-circuit conditions occur. This helps protect cables, switchgear and connected equipment from damage caused by excessive current.
The Z curve provides rapid magnetic tripping, making this breaker especially suitable for protecting sensitive electronics, control circuits and instrumentation. This helps ensure fast fault response while maintaining reliable operation in appropriate low-inrush applications.
| Current | 50 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | S200M |
| Model | S203M-Z50 |
| Product ID | 2CDS273001R0578 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 50 A |
| Number of poles | 3P |
| Tripping characteristic | Z |
| Rated operational voltage | 230 / 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | approx. 0.36 kg |
| EAN | 4016779601368 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-Z50 is used to protect three-phase electrical circuits against overloads and short circuits, especially where sensitive electronic equipment requires rapid fault protection.
The Z characteristic provides fast magnetic tripping and is designed for protecting sensitive electronic devices and control circuits with low inrush currents.
The ABB S203M-Z50 has a 50 A rated current.
This model is a three-pole (3P) miniature circuit breaker for three-phase electrical systems.
The ABB S203M-Z50 provides a 10 kA short-circuit breaking capacity at 230 / 400 V AC.
ABB S200M miniature circuit breakers are trusted by contractors, panel builders and industrial engineers for reliable protection, compact installation and consistent performance in demanding electrical systems.
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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...