Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
ABB S203-Z50 MCB – S200 – 3P – Z – 50A
ABB S203-Z50 three-pole 50 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.
£112.43
Why Choose the ABB S203-Z50 Miniature Circuit Breaker?
The ABB S203-Z50 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed to provide dependable protection against overloads and short circuits, it is ideally suited to industrial automation systems, control panels and sensitive electronic equipment where rapid fault protection is essential.
Featuring a Z tripping characteristic, the S203-Z50 is specifically engineered for applications requiring fast magnetic tripping, making it ideal for protecting PLCs, instrumentation, semiconductor equipment and other sensitive electronic circuits. Its advanced thermal and electromagnetic trip mechanisms provide dependable overload protection while ensuring rapid fault isolation.
With a 50 A rated current, three protected poles and a 6 kA breaking capacity, the ABB S203-Z50 offers compact DIN rail installation, excellent electrical endurance and full compatibility with ABB System pro M Compact accessories for commercial and industrial electrical installations.
Key Advantages
- Premium three-pole miniature circuit breaker.
- 50 A rated current with Z tripping characteristic.
- Fast magnetic tripping for sensitive electronic equipment.
- 6 kA rated breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB System pro M Compact S200 series.
- 50 A rated current.
- Z tripping characteristic.
- Three-pole (3P) configuration.
- 6 kA rated short circuit breaking capacity.
- Current limiting construction.
- DIN rail mounting.
- Failsafe bi-directional cylinder-lift screw terminals.
Reliable Protection for Sensitive Electronic Circuits
The ABB S203-Z50 automatically disconnects electrical circuits when overload or short circuit conditions occur, helping to minimise equipment damage and improve system reliability. Its Z characteristic provides rapid magnetic tripping, making it particularly suitable for protecting sensitive electronic devices, PLCs and instrumentation systems.
Manufactured in accordance with IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 standards, the S203-Z50 delivers dependable long-term performance, excellent electrical endurance and straightforward installation in commercial and industrial electrical systems.
Typical Applications
- PLC and automation systems.
- Industrial control panels.
- Instrumentation circuits.
- Semiconductor equipment.
- Sensitive electronic control systems.
- Commercial and industrial electrical installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Phase | Three Phase | |
| Current | 50 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-Z50 | |
| Manufacturer Part Number | 2CDS253001R0578 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 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 (IP40 when installed in an enclosure) | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| Weight | Approx. 0.36 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-Z50 used for?
The ABB S203-Z50 protects three-phase electrical circuits against overloads and short circuits, particularly where sensitive electronic equipment requires rapid fault protection.
What does the Z tripping characteristic mean?
The Z characteristic provides fast magnetic tripping, making it ideal for PLCs, instrumentation, semiconductor equipment and other sensitive electronic devices.
How many poles does this circuit breaker have?
The ABB S203-Z50 is a three-pole (3P) miniature circuit breaker.
What is the rated current?
This miniature circuit breaker has a 50 A rated current.
How is the ABB S203-Z50 installed?
The breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted worldwide by panel builders, OEM manufacturers and electrical engineers for dependable circuit protection, outstanding reliability and long operational life.
