Why Choose the ABB S203M-Z3NA Miniature Circuit Breaker?
The ABB S203M-Z3NA is a compact and reliable 4-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200M series. Designed to protect electrical circuits against overloads and short circuits, it is suitable for professional installations where dependable low-current protection and fast fault response are required.
This miniature circuit breaker 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 very sensitive magnetic tripping, making it suitable for protection of electronic equipment, control circuits and applications where rapid disconnection at low fault currents is important.
With a 3 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203M-Z3NA provides professional-grade circuit protection for three-phase systems with neutral switching. Its DIN rail mounting format allows efficient installation in control panels, distribution boards and automation enclosures.
Key Advantages
- Compact 3P+N miniature circuit breaker for professional installations.
- 3 A rated current for precise low-current circuit protection.
- Z curve tripping characteristic for sensitive protection of control and electronic circuits.
- 10 kA short-circuit breaking capacity for dependable fault protection.
- Current-limiting design helps reduce fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200M series.
- Product ID: 2CDS273103R0318.
- Model: S203M-Z3NA.
- Rated current: 3 A.
- Z curve tripping characteristic.
- 3P+N configuration with three protected poles and neutral switching.
- Thermal overload and electromechanical short-circuit protection.
- DIN rail mounting with screw terminal connections.
Sensitive Protection for Control and Electronic Circuits
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203M-Z3NA combines thermal and magnetic tripping to help protect wiring, components and connected equipment from electrical faults.
The Z curve characteristic is designed for applications requiring fast operation at lower fault currents. This makes the S203M-Z3NA well suited to sensitive circuits, electronic loads, measuring circuits and control systems where rapid disconnection helps reduce the risk of equipment damage.
Typical Applications
- Industrial control panels.
- Electronic equipment protection.
- Measuring and instrumentation circuits.
- Automation and machine control systems.
- Commercial distribution boards.
- Three-phase circuits with neutral switching.
