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ABB S203MT-Z50NAH10 MCB – S200M – 3P+N – Z – 50A
ABB S203MT-Z50NAH10 miniature circuit breaker with Z characteristic, 50 A rated current, 3P+N configuration and 10 kA breaking capacity for industrial, railway and automation applications.
This product has been discontinued
A direct replacement is available below.
Replacement product
ABB s203mt-z50na mcb s200p 4p z type 50amp
SKU: S203MT-Z50NA
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Why Choose the ABB S203MT-Z50NAH10 Miniature Circuit Breaker?
The ABB S203MT-Z50NAH10 is a premium three-pole plus neutral (3P+N) miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection for industrial, railway and transportation electrical systems. As part of the specialist ABB S200MT series, it is engineered specifically for demanding low-voltage applications where reliability, safety and long service life are essential.
Featuring a Z tripping characteristic, this miniature circuit breaker is ideally suited to protecting sensitive electronic equipment, PLCs, signalling systems and control circuits requiring rapid magnetic tripping at relatively low fault currents. Its fast response helps protect valuable electrical equipment whilst maintaining dependable system operation.
With a 50 A rated current, 3P+N configuration and a 10 kA short-circuit breaking capacity, the ABB S203MT-Z50NAH10 is ideal for industrial control panels, OEM machinery, railway applications and modular DIN rail distribution systems.
Key Advantages
- Compact 3P+N miniature circuit breaker for industrial and railway applications.
- 50 A rated current suitable for higher current control and distribution circuits.
- Z characteristic provides rapid protection for sensitive electronic equipment.
- 10 kA rated short-circuit breaking capacity.
- Integrated switched neutral for simplified installation.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 50 A rated current.
- Z tripping characteristic.
- Three protected poles plus switched neutral (3P+N).
- 10 kA rated breaking capacity.
- Thermal overload and magnetic short-circuit protection.
- Current-limiting Class 3 performance.
- DIN rail mounting with screw terminals.
Reliable Protection for Sensitive Electrical Systems
The ABB S203MT-Z50NAH10 combines delayed thermal overload protection with rapid magnetic short-circuit protection to safeguard sensitive electrical installations. Its Z characteristic enables rapid fault clearance, helping protect electronic equipment whilst maintaining safe and reliable operation.
Designed for industrial automation, railway and transportation applications, the S200MT range provides dependable long-term performance, compact installation and compatibility with ABB System pro M Compact accessories for professional electrical installations.
Typical Applications
- Industrial control panels.
- Railway and transportation electrical systems.
- Sensitive electronic control circuits.
- PLC and automation equipment.
- OEM machinery.
- Low-voltage electrical distribution boards.
Technical Specifications
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| Current | 50 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-Z50NAH10 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 50 A | |
| Tripping characteristic | Z | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Rated operational voltage | Up to 440 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Rated short-circuit breaking capacity | 10 kA | |
| Frequency | 50 / 60 Hz | |
| Current limiting class | 3 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Weight | approx. 0.50 kg |
Frequently Asked Questions
What is the ABB S203MT-Z50NAH10 used for?
It provides overload and short-circuit protection for sensitive electrical circuits in industrial, railway and automation applications.
What does the Z tripping characteristic provide?
The Z characteristic provides rapid magnetic tripping at relatively low fault currents, making it ideal for protecting sensitive electronic equipment and control systems.
What is the rated current of this circuit breaker?
The ABB S203MT-Z50NAH10 has a rated current of 50 A.
What is the breaking capacity?
This miniature circuit breaker provides a rated short-circuit breaking capacity of 10 kA.
Where is this miniature circuit breaker typically installed?
It is designed for DIN rail installation inside industrial control panels, distribution boards, OEM machinery and railway electrical systems.
Trusted by Electrical Professionals Worldwide
ABB S200MT miniature circuit breakers are trusted by panel builders, railway engineers and industrial automation specialists for delivering dependable circuit protection, excellent reliability and long operational life in demanding low-voltage installations.
