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-Z4H01 MCB – S200M – 3P – Z – 4A
ABB S203MT-Z4H01 three pole 4A Z characteristic miniature circuit breaker designed for railway, traction and industrial electrical protection with 10 kA breaking capacity.
Why Choose the ABB S203MT-Z4H01 Miniature Circuit Breaker?
The ABB S203MT-Z4H01 is a premium 3-pole miniature circuit breaker (MCB) designed to provide dependable overload and short circuit protection in railway, traction and industrial electrical installations. As part of the proven ABB S200MT miniature circuit breaker range, it delivers high reliability for demanding environments where safety and continuous operation are essential.
Featuring a Z characteristic tripping curve, the S203MT-Z4H01 is specifically designed to protect sensitive electronic equipment, signalling systems, instrumentation and control circuits. Its rapid magnetic tripping response helps disconnect fault currents quickly, reducing the risk of damage to valuable electrical components.
With a 4 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-Z4H01 is ideally suited to railway rolling stock, industrial control panels, automation systems and OEM machinery requiring dependable three-phase circuit protection.
Key Advantages
- Designed for railway, traction and industrial electrical applications.
- 3-pole miniature circuit breaker for three-phase systems.
- 4 A rated current for low-current distribution and control circuits.
- Z characteristic tripping curve provides rapid protection for sensitive electronics.
- 10 kA rated short circuit breaking capacity.
- Compact DIN rail design for quick installation and maintenance.
Key Features
- ABB S200MT series.
- Model: S203MT-Z4H01.
- Rated current: 4 A.
- Z characteristic tripping curve.
- 3 protected poles (3P).
- 10 kA short circuit capacity.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounting with compatibility across ABB accessory ranges.
Fast Acting Protection for Sensitive Electrical Systems
The ABB S203MT-Z4H01 combines thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical installations from damaging fault conditions. Its Z characteristic enables rapid disconnection where electronic equipment and precision control systems require enhanced protection against relatively low fault currents.
Its compact modular construction allows straightforward installation on standard DIN rails whilst maintaining compatibility with ABB accessories, making it an excellent solution for modern industrial control panels and railway electrical equipment.
Typical Applications
- Railway and rolling stock electrical systems.
- Industrial control panels.
- Electronic control equipment.
- Instrumentation and signalling circuits.
- OEM machinery.
- Automation and process control systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 4 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z4H01 | |
| Alternative model | S203MT-Z4 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 4 A | |
| Tripping characteristic | Z | |
| Number of poles | 3 | |
| Rated operational voltage | Up to 400 V AC | |
| Rated insulation voltage | 440 V | |
| Frequency | 50 / 60 Hz | |
| Rated short circuit capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm | |
| Weight | approx. 0.375 kg |
Frequently Asked Questions
What is the ABB S203MT-Z4H01 used for?
It protects three-phase electrical circuits against overloads and short circuits in railway, industrial and automation applications.
What is the rated current of this circuit breaker?
The ABB S203MT-Z4H01 has a 4 A rated current.
What does the Z tripping characteristic mean?
The Z characteristic provides rapid magnetic tripping at relatively low fault current levels, making it suitable for protecting sensitive electronic equipment and control circuits.
How many poles does this MCB have?
This model features a 3-pole (3P) configuration for three-phase electrical protection.
How is the ABB S203MT-Z4H01 installed?
The circuit breaker is designed for installation on a standard DIN rail inside electrical distribution boards and industrial control panels.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by OEMs, panel builders and railway engineers for delivering dependable electrical protection in demanding transportation and industrial environments.
