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ABB S203MT-Z20H01 MCB – S200M – 3P – Z – 20A
ABB S203MT-Z20H01 miniature circuit breaker from the S200MT series featuring a 20 A rated current, Z tripping characteristic, 3-pole configuration and 10 kA breaking capacity for traction and industrial applications.
£81.25
Why Choose the ABB S203MT-Z20H01 Miniature Circuit Breaker?
The ABB S203MT-Z20H01 is a specialist miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for traction, railway and demanding industrial electrical installations. As part of the ABB System pro M Compact S200MT series, it delivers dependable protection, high breaking capacity and long service life in applications where operational reliability is critical.
Featuring a 20 A rated current and a Z tripping characteristic, the S203MT-Z20H01 is ideal for protecting sensitive circuits that require rapid magnetic tripping. Its 3-pole configuration makes it suitable for three-phase systems used throughout railway vehicles, industrial control equipment and specialist machinery.
Designed for DIN rail mounting, the ABB S203MT-Z20H01 combines compact dimensions with a robust construction, making it easy to install inside distribution boards, control panels and railway electrical cabinets while delivering dependable protection against overloads and short circuits.
Key Advantages
- Reliable miniature circuit breaker for traction and railway applications.
- 20 A rated current for three-phase electrical circuits.
- Z characteristic provides rapid protection for sensitive equipment.
- 3-pole configuration for coordinated three-phase protection.
- 10 kA short-circuit breaking capacity.
- Compact DIN rail mounted design for professional installations.
Key Features
- ABB S200MT miniature circuit breaker series.
- 20 A rated current.
- Z tripping characteristic.
- 3-pole configuration.
- 10 kA rated short-circuit capacity.
- Thermal magnetic trip mechanism.
- Failsafe bi-directional cylinder-lift screw terminals.
- Compatible with ABB System pro M Compact accessories.
Reliable Protection for Sensitive Three-Phase Circuits
Miniature circuit breakers such as the ABB S203MT-Z20H01 automatically disconnect electrical circuits during overload or short-circuit conditions. This helps protect wiring, connected equipment and control systems while improving operational safety.
The Z characteristic provides rapid magnetic tripping at relatively low fault currents, making this breaker particularly suitable for protecting sensitive electronic equipment, signalling systems and specialist railway applications where fast fault clearance is essential.
Typical Applications
- Railway and rolling stock electrical systems.
- Industrial control panels.
- Sensitive electronic equipment.
- Automation and signalling systems.
- Three-phase machinery.
- Commercial and industrial distribution boards.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z20H01 | |
| Manufacturer part number | 2CDO273006R0488 | |
| EAN | 4016779770781 | |
| Product type | Miniature circuit breaker | |
| Rated current | 20 A | |
| Tripping characteristic | Z | |
| Number of poles | 3P | |
| Rated operational voltage | 400 / 440 V AC | |
| Rated insulation voltage | 440 V | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 10 kA | |
| Rated ultimate short-circuit breaking capacity | 15 kA | |
| Rated service short-circuit breaking capacity | 11.25 kA | |
| Rated impulse withstand voltage | 4 kV | |
| Current limiting class | 3 | |
| Terminal type | Screw terminals | |
| Mounting type | DIN rail TH35 | |
| Protection rating | IP20 | |
| Operating temperature | -40 to +70 °C | |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm | |
| Weight | approx. 0.38 kg |
Frequently Asked Questions
What is the ABB S203MT-Z20H01 used for?
The ABB S203MT-Z20H01 protects three-phase electrical circuits against overloads and short circuits, particularly in railway, traction and industrial applications requiring rapid fault protection.
What is the rated current of the S203MT-Z20H01?
This miniature circuit breaker has a rated current of 20 A.
What does Z characteristic mean?
A Z characteristic breaker provides very fast magnetic tripping, making it suitable for protecting sensitive circuits and electronic equipment.
What pole configuration does this MCB have?
The ABB S203MT-Z20H01 has a 3-pole configuration, providing coordinated protection for three-phase electrical systems.
How is the ABB S203MT-Z20H01 installed?
The breaker is designed for standard DIN rail mounting inside electrical distribution boards, control panels and railway cabinets.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by railway manufacturers, panel builders and industrial engineers for dependable protection in demanding electrical installations.
