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ABB S203MT-Z63 MCB – S200M – 3P – Z – 63A
ABB S203MT-Z63 3-pole 63 A miniature circuit breaker with Z characteristic tripping curve and 10 kA short circuit capacity for railway, traction and industrial circuit protection.
Why Choose the ABB S203MT-Z63 Miniature Circuit Breaker?
The ABB S203MT-Z63 is a dependable 3-pole miniature circuit breaker (MCB) designed for overload and short circuit protection in railway, traction and demanding industrial applications. As part of the specialised ABB S200MT miniature circuit breaker series, it delivers compact, high performance protection for electrical systems where safety, reliability and long operational life are essential.
This circuit breaker combines delayed thermal overload protection with rapid electromagnetic short circuit protection. Its Z characteristic tripping curve is designed for sensitive circuits with low inrush current, providing fast fault response where early disconnection helps protect downstream equipment.
With a 63 A rated current, 3-pole configuration and 10 kA short circuit capacity, the ABB S203MT-Z63 is suitable for higher load three-phase circuits in railway systems, industrial control panels and low voltage distribution boards. Its DIN rail mounted format enables efficient installation in modular electrical assemblies.
Key Advantages
- Specialist 3-pole miniature circuit breaker for railway and industrial applications.
- 63 A rated current suitable for higher load three-phase protection.
- Z characteristic tripping curve for sensitive circuits with low inrush current.
- 10 kA short circuit capacity for dependable fault protection.
- Designed for traction and rolling stock electrical systems.
- DIN rail mounting for quick installation inside electrical panels.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- 63 A rated current.
- 3-pole configuration.
- Z characteristic tripping curve.
- 10 kA rated short circuit capacity.
- Thermal overload and electromagnetic short circuit protection.
- DIN rail mounting for modular panel installation.
- Suitable for railway, traction, automation and industrial control systems.
Reliable Circuit Protection for Sensitive Three-Phase Systems
The ABB S200MT range is engineered for railway and traction environments where dependable low voltage protection is critical. These miniature circuit breakers help protect conductors, control equipment and connected devices against overload and short circuit conditions whilst supporting compact, modular panel design.
The Z curve characteristic of the S203MT-Z63 provides rapid magnetic tripping at lower fault current levels than many general-purpose curves. This makes it well suited to sensitive control circuits, electronic equipment and applications where fast disconnection helps reduce the risk of damage to downstream components.
Typical Applications
- Railway rolling stock electrical systems.
- Traction and transport control panels.
- Sensitive three-phase control circuits.
- Industrial automation equipment.
- Low voltage distribution boards.
- Electrical panels requiring fast fault response.
Technical Specifications
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| Current | 63 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z63 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 63 A | |
| Number of poles | 3 | |
| Tripping characteristic | Z | |
| Rated short circuit capacity | 10 kA | |
| Rated operational voltage | 400 V AC / 440 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Current limiting class | Class 3 | |
| Typical applications | Railway, rolling stock, traction systems, industrial control panels and sensitive three-phase circuits | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z63 used for?
The S203MT-Z63 is used to protect three-phase circuits against overloads and short circuits in railway, traction and industrial applications.
What current rating does this MCB have?
The ABB S203MT-Z63 has a 63 A rated current.
What does the Z tripping characteristic mean?
The Z curve provides fast tripping at lower fault current levels, making it suitable for sensitive circuits with low inrush current.
How many poles does the S203MT-Z63 have?
This model has a 3-pole configuration, making it suitable for protecting three-phase electrical circuits.
Is the ABB S203MT-Z63 suitable for railway applications?
Yes, the S200MT range is designed for traction and railway applications, including rolling stock electrical systems and transport control panels.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electrical professionals for reliable circuit protection, compact installation and long service life in demanding low voltage systems.
