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ABB S203M-Z20 MCB – S200M – 3P – Z – 20A
ABB S203M-Z20 three-pole 20 A miniature circuit breaker with Z tripping characteristic for protecting sensitive industrial and commercial electrical circuits.
£79.53
Why Choose the ABB S203M-Z20 Miniature Circuit Breaker?
The ABB S203M-Z20 is a high performance three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB S200M series, this MCB combines advanced protection technology with robust construction to ensure reliable circuit protection in demanding environments.
Featuring a Z tripping characteristic, the S203M-Z20 is particularly suited to protecting highly sensitive circuits with very low inrush currents, making it ideal for electronic equipment, control circuits, PLC systems and instrumentation. Its current limiting design helps reduce fault energy, protecting both equipment and wiring while improving system safety.
With a 20 A current rating, three protected poles and a 6 kA breaking capacity, the ABB S203M-Z20 delivers reliable performance across a wide range of industrial control panels, automation systems and electrical distribution applications. The compact DIN rail mounting design allows fast installation inside switchboards and distribution cabinets.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial applications.
- 20 A rated current for reliable circuit protection.
- Z tripping characteristic for sensitive electronic loads.
- 6 kA breaking capacity for dependable fault protection.
- Current limiting design helps minimise damage during fault conditions.
- Fully compatible with ABB System pro M Compact accessories.
Key Features
- ABB S200M miniature circuit breaker series.
- 20 A rated current.
- Three-pole (3P) configuration.
- Z characteristic thermal and magnetic trip curve.
- 6 kA rated short-circuit breaking capacity.
- DIN rail mounting.
- Failsafe bi-directional cylinder-lift screw terminals.
- Suitable for AC and DC applications.
Reliable Protection for Sensitive Electrical Circuits
The ABB S203M-Z20 protects electrical circuits by automatically disconnecting the supply during overload or short circuit conditions. Its advanced thermal and magnetic trip mechanisms provide rapid fault detection while reducing stress on connected equipment and electrical installations.
The Z characteristic is specifically intended for applications with highly sensitive electronic equipment where rapid magnetic tripping is required. This makes the S203M-Z20 an excellent choice for industrial automation, instrumentation and specialist control systems.
Typical Applications
- PLC and automation control panels.
- Electronic equipment protection.
- Instrumentation circuits.
- Industrial machinery.
- Control cabinets and switchboards.
- Commercial and industrial electrical distribution.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 20 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | S200M | |
| Model | S203M-Z20 | |
| 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 | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 | |
| Protection rating | IP20 (IP40 when installed in enclosure) | |
| 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 |
Frequently Asked Questions
What is the ABB S203M-Z20 used for?
The ABB S203M-Z20 protects three-phase electrical circuits against overloads and short circuits, particularly where sensitive electronic equipment requires a Z characteristic circuit breaker.
What does the Z tripping characteristic mean?
A Z characteristic MCB trips very quickly under short circuit conditions and is designed for protecting sensitive electronic devices and control circuits with low inrush currents.
How many poles does the S203M-Z20 have?
This model is a three-pole (3P) miniature circuit breaker designed for three-phase electrical systems.
What is the current rating of this circuit breaker?
The ABB S203M-Z20 has a 20 A rated current.
How is the S203M-Z20 installed?
The breaker is designed for quick installation onto standard DIN rails inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB S200M miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for delivering dependable circuit protection, consistent performance and long service life in demanding installations.
