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ABB S203MT-Z3NA MCB – S200M – 3P+N – Z – 3A
ABB S203MT-Z3NA 3P+N miniature circuit breaker with 3 A rated current, Z curve tripping characteristic and 10 kA breaking capacity for railway, control and sensitive circuit protection.
Why Choose the ABB S203MT-Z3NA Miniature Circuit Breaker?
The ABB S203MT-Z3NA is a compact 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200MT series. Designed especially for traction, railway and demanding industrial applications, it provides reliable protection against overloads and short circuits in electrical systems where dependable low-current protection is essential.
The S200MT range uses ABB's current-limiting technology with a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its Z curve characteristic provides sensitive magnetic tripping, making it suitable for control circuits, electronic equipment, instrumentation and applications requiring fast disconnection at lower fault currents.
With a 3 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203MT-Z3NA is ideal for protecting low-current three-phase circuits with neutral switching. Its compact DIN rail design supports efficient installation in railway electrical enclosures, control panels, distribution boards and OEM machinery.
Key Advantages
- Compact 3P+N miniature circuit breaker for railway and industrial installations.
- 3 A rated current for sensitive low-current circuit protection.
- Z curve tripping characteristic for electronic, control and instrumentation circuits.
- 10 kA rated short-circuit breaking capacity for dependable fault protection.
- Current-limiting design helps reduce fault energy.
- DIN rail mounting for fast installation in panels and distribution boards.
Key Features
- ABB System pro M compact S200MT series.
- Product ID: 2CDS273106R0318.
- Model: S203MT-Z3NA.
- Rated current: 3 A.
- Z curve tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- Thermal overload and electromechanical short-circuit protection.
- Compact DIN rail design with screw terminal connections.
Sensitive Protection for Railway and Control Circuits
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203MT-Z3NA combines thermal and magnetic tripping performance to help protect cables, sensitive components and connected equipment from electrical faults.
The Z curve characteristic is designed for applications requiring rapid response at lower fault current levels. This makes the S203MT-Z3NA well suited to control systems, electronic equipment, measuring circuits and railway auxiliary systems where sensitive protection is required.
Typical Applications
- Railway rolling stock electrical systems.
- Industrial control panels.
- Electronic equipment protection.
- Instrumentation and measuring circuits.
- Low-current three-phase circuits with neutral switching.
- OEM machinery and automation systems.
Technical Specifications
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| Current | 3 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200MT | |
| Model | S203MT-Z3NA | |
| Product ID | 2CDS273106R0318 | |
| EAN | 4016779771634 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 3 A | |
| Tripping characteristic | Z | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Rated insulation voltage | 440 V | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 10 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Screw terminals | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Weight | approx. 0.50 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z3NA used for?
The ABB S203MT-Z3NA is used to protect low-current three-phase circuits with neutral against overloads and short circuits.
What is the rated current of this MCB?
The ABB S203MT-Z3NA has a 3 A rated current.
What does the Z curve characteristic mean?
A Z curve breaker provides sensitive magnetic tripping, making it suitable for electronic equipment, control circuits and applications requiring rapid disconnection at lower fault currents.
How many poles does the S203MT-Z3NA have?
The S203MT-Z3NA has a 3P+N configuration, with three protected poles and a switched neutral.
How is this ABB MCB installed?
The ABB S203MT-Z3NA is designed for standard DIN rail mounting inside distribution boards, control panels and railway electrical enclosures.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electricians for reliable protection, compact installation and dependable performance in demanding electrical systems.
