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ABB S203MT-Z40NA MCB – S200M – 3P+N – Z – 40A
ABB S203MT-Z40NA 3P+N 40 A Z curve miniature circuit breaker with 10 kA breaking capacity for railway, traction, industrial and commercial electrical protection.
Why Choose the ABB S203MT-Z40NA Miniature Circuit Breaker?
The ABB S203MT-Z40NA is a reliable 3P+N miniature circuit breaker (MCB) designed for railway, traction, rolling stock and demanding industrial electrical installations. Part of the specialist ABB S200MT miniature circuit breaker range, it provides dependable protection against overloads and short circuits in critical low voltage circuits.
Featuring a Z tripping characteristic, the S203MT-Z40NA is suitable for sensitive circuits requiring fast magnetic tripping response. Its current limiting design helps reduce fault energy, protecting cables, components and connected equipment during short circuit conditions.
With a rated current of 40 A, a 3P+N configuration and a 10 kA breaking capacity, this ABB MCB is ideal for three-phase systems with neutral switching. It is DIN rail mounted and compatible with ABB System pro M Compact accessories for flexible installation in control panels and distribution boards.
Key Advantages
- High quality ABB S200MT miniature circuit breaker.
- 40 A rated current for three-phase electrical protection.
- Z characteristic for sensitive circuits requiring rapid tripping.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for robust fault protection.
- Designed for railway, traction, industrial and commercial installations.
Key Features
- ABB S200MT series.
- 40 A rated current.
- Z tripping characteristic.
- 3 protected poles plus neutral.
- 10 kA rated breaking capacity.
- Current limiting miniature circuit breaker design.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounting for control panels and distribution boards.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-Z40NA uses both delayed thermal tripping for overload protection and electromechanical magnetic tripping for short circuit protection. This combination helps maintain circuit reliability while reducing the risk of damage during fault conditions.
The S200MT range is designed especially for traction and railway applications, with robust construction and compatibility with ABB System pro M Compact accessories. This makes the S203MT-Z40NA suitable for use in control cabinets, rolling stock panels, distribution systems and industrial automation equipment.
Typical Applications
- Railway and rolling stock electrical systems.
- Traction power and auxiliary circuits.
- Industrial distribution boards.
- Control panels and switchboards.
- Protection of sensitive electrical circuits.
- Commercial and infrastructure electrical installations.
Technical Specifications
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| Current | 40 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-Z40NA | |
| Product ID | 2CDS273446R0558 | |
| EAN | 4016779128315 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 40 A | |
| Tripping characteristic | Z | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Breaking capacity | 10 kA | |
| Rated operational voltage | Up to 440 V AC | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z40NA used for?
It is used to protect three-phase electrical circuits with neutral switching against overloads and short circuits in railway, traction, industrial and commercial installations.
What does the Z tripping characteristic mean?
The Z characteristic provides fast magnetic tripping and is commonly used for sensitive circuits where rapid disconnection is required under fault conditions.
What is the rated current of the ABB S203MT-Z40NA?
The ABB S203MT-Z40NA has a rated current of 40 A.
How many poles does this miniature circuit breaker have?
This model has a 3P+N configuration, meaning three protected poles plus a neutral pole.
How is the S203MT-Z40NA installed?
The circuit breaker is designed for DIN rail mounting inside electrical control panels, distribution boards and switchgear assemblies.
Trusted by Electrical Professionals Worldwide
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electrical professionals for dependable protection, compact installation and compliance with recognised international standards.
