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ABB S203MT-Z0.5NAH10 MCB – S200M – 3P+N – Z – 0.5A
ABB S203MT-Z0.5NAH10 S200MT miniature circuit breaker featuring a 3P+N configuration, 0.5 A rated current and Z curve characteristic for railway, traction and industrial circuit protection.
This product has been discontinued
A direct replacement is available below.
Replacement product
ABB s203mt-z0.5na mcb s200m 4p z type 0.5amp
SKU: 2CDS273446R0158
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Why Choose the ABB S203MT-Z0.5NAH10 Miniature Circuit Breaker?
The ABB S203MT-Z0.5NAH10 is a specialist 3P+N miniature circuit breaker (MCB) from the ABB S200MT traction and railway series. Developed specifically for railway vehicles, rolling stock and demanding industrial environments, it provides dependable overload and short circuit protection for low-current three-phase circuits with neutral switching.
Featuring a Z tripping characteristic, the S203MT-Z0.5NAH10 is designed for highly sensitive applications requiring rapid magnetic tripping at relatively low fault currents. This makes it particularly suitable for protecting electronic equipment, signalling systems, control circuits, instrumentation and sensitive automation equipment.
With a 0.5 A rated current, 3P+N configuration and compact DIN rail mounted construction, this miniature circuit breaker offers reliable protection while meeting the demanding requirements of railway and transport applications. The S200MT range complies with recognised railway standards and is fully compatible with ABB System pro M compact accessories.
Key Advantages
- Designed specifically for railway and traction applications.
- 0.5 A rated current for precise low-current protection.
- Z curve characteristic for highly sensitive circuits.
- 3P+N configuration with switched neutral.
- Current limiting construction helps reduce fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT traction miniature circuit breaker.
- 0.5 A rated current.
- Z tripping characteristic.
- 3P+N configuration.
- Rated operational voltage up to 440 V AC.
- 10 kA breaking capacity to IEC/EN 60898-1.
- 15 kA ultimate breaking capacity to IEC/EN 60947-2.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounted modular construction.
Reliable Protection for Railway and Sensitive Control Circuits
The ABB S203MT-Z0.5NAH10 combines delayed thermal overload protection with instantaneous magnetic short circuit protection to safeguard sensitive electrical circuits. The Z curve characteristic provides very fast magnetic tripping, making it ideal for electronic equipment and circuits where rapid fault clearance is essential.
The S200MT range has been developed specifically for railway applications and complies with recognised international standards for rolling stock. It also offers full compatibility with ABB modular accessories, enabling flexible installation in transport, industrial and automation systems.
Typical Applications
- Railway and rolling stock electrical systems.
- Control and signalling equipment.
- Instrumentation circuits.
- Electronic protection circuits.
- Industrial automation systems.
- Control panels.
- OEM transport equipment.
Technical Specifications
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| Current | 0.5 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z0.5NAH10 | |
| Equivalent current model | S203MT-Z0.5NA | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 0.5 A | |
| Poles | 3P+N | |
| Protected poles | 3 | |
| Trip characteristic | Z Curve | |
| Rated operational voltage | 440 V AC | |
| Rated insulation voltage | 440 V | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 10 kA (IEC/EN 60898-1) | |
| Ultimate breaking capacity | 15 kA (IEC/EN 60947-2) | |
| Rated service breaking capacity | 11.2 kA | |
| Current limiting class | 3 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Mechanical endurance | 20,000 operating cycles | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
Frequently Asked Questions
What is the ABB S203MT-Z0.5NAH10 used for?
The ABB S203MT-Z0.5NAH10 protects low-current three-phase electrical circuits against overloads and short circuits in railway, transport and industrial control applications.
What does the Z curve characteristic mean?
A Z curve MCB provides highly sensitive magnetic tripping and is intended for electronic equipment, instrumentation and specialist control circuits.
How many poles does this circuit breaker have?
The S203MT-Z0.5NAH10 has a 3P+N configuration, providing protection for three phases together with a switched neutral.
What is the rated current?
The ABB S203MT-Z0.5NAH10 has a rated current of 0.5 A.
Is this suitable for railway applications?
Yes. The ABB S200MT series has been specifically developed for railway and traction applications while also being suitable for demanding industrial installations.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are trusted by railway manufacturers, transport engineers and industrial panel builders for dependable circuit protection, robust construction and long service life in demanding operating environments.
