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 S203MT-Z8 MCB – S200M – 3P – Z – 8A
ABB S203MT-Z8 miniature circuit breaker, a 3-pole Z curve 8 A MCB from the S200MT range designed for railway, traction and industrial control applications.
Why Choose the ABB S203MT-Z8 Miniature Circuit Breaker?
The ABB S203MT-Z8 is a compact and dependable 3-pole miniature circuit breaker (MCB) designed to provide rapid overload and short-circuit protection for sensitive electrical circuits. As part of the specialist ABB S200MT miniature circuit breaker range, it has been developed specifically for traction, railway and demanding industrial control applications where dependable circuit protection is essential.
The circuit breaker combines thermal overload protection with an electromagnetic short-circuit trip mechanism. Its Z characteristic enables fast tripping at comparatively low fault current levels, making it particularly suitable for sensitive electronic equipment, signalling circuits, PLC inputs and control systems where rapid fault isolation is required.
With a rated current of 8 A, a 3-pole configuration and a rated short-circuit breaking capacity of 10 kA, the S203MT-Z8 provides reliable protection for three-phase auxiliary, control and distribution circuits. Its compact DIN rail design allows simple installation inside electrical panels, rolling stock cabinets and industrial switchboards.
Key Advantages
- Compact 3-pole miniature circuit breaker for traction and railway applications.
- 8 A rated current for dependable circuit protection.
- Z curve tripping characteristic for fast response to low fault currents.
- 10 kA breaking capacity for reliable short-circuit protection.
- Current limiting class 3 helps reduce fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 3-pole MCB configuration.
- 8 A rated current.
- Z characteristic tripping curve.
- 10 kA rated short-circuit breaking capacity.
- Thermal and electromagnetic protection mechanisms.
- Designed for railway, traction and industrial applications.
- DIN rail mounting for electrical panels and distribution boards.
Reliable Protection for Sensitive Electrical Systems
Miniature circuit breakers such as the ABB S203MT-Z8 automatically disconnect electrical circuits during overload or short-circuit conditions, helping protect wiring, control equipment and connected devices from electrical faults and reducing downtime.
The ABB S200MT range has been developed specifically for rolling stock and railway applications while also being suitable for industrial automation systems. Its robust construction, compact footprint and high performance make it an excellent choice for engineers, OEMs and panel builders.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock control cabinets.
- Industrial automation panels.
- Electronic control circuits.
- Three-phase auxiliary systems.
- Signalling and monitoring equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 8 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z8 | |
| Product type | Miniature circuit breaker | |
| Number of poles | 3P | |
| Rated current | 8 A | |
| Tripping characteristic | Z curve | |
| Rated voltage | 440 V AC | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 10 kA | |
| Rated impulse withstand voltage | 4 kV | |
| Current limiting class | 3 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail mounting | |
| Built-in depth | approx. 69 mm | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z8 used for?
The ABB S203MT-Z8 protects sensitive three-phase electrical circuits against overloads and short circuits in railway, traction and industrial control applications.
What is the rated current of this MCB?
The S203MT-Z8 has a rated current of 8 A.
How many poles does the S203MT-Z8 have?
This miniature circuit breaker features a 3-pole configuration.
What does the Z curve tripping characteristic provide?
The Z characteristic provides rapid tripping at comparatively low fault current levels, making it suitable for protecting sensitive electronic and control circuits.
What is the rated breaking capacity?
The ABB S203MT-Z8 has a rated short-circuit breaking capacity of 10 kA.
Trusted by Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial automation specialists to provide dependable protection for critical electrical installations.
