Why Choose the ABB S203M-Z3 Miniature Circuit Breaker?
The ABB S203M-Z3 is a high-quality 3-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200M series. Designed for reliable overload and short circuit protection, it is suitable for industrial, commercial and OEM electrical installations where sensitive circuits require fast and dependable fault protection.
Featuring a Z tripping characteristic, the S203M-Z3 is particularly suited to sensitive electrical equipment, electronic control circuits, semiconductor protection, measuring systems and PLC-based automation panels. The Z curve provides rapid magnetic tripping at low fault current levels, helping protect connected devices from damage.
With a 3 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203M-Z3 combines compact DIN rail installation with ABB's proven current limiting technology, reducing fault energy and supporting safe operation in demanding electrical systems.
Key Advantages
- Reliable 3-pole miniature circuit breaker for professional installations.
- 3 A rated current for low-current protection circuits.
- Z tripping characteristic for sensitive electronic equipment protection.
- 10 kA breaking capacity for dependable short circuit protection.
- Current limiting design helps minimise thermal and mechanical stress during faults.
- DIN rail mounting for fast installation in control panels and distribution boards.
Key Features
- ABB System pro M compact S200M series.
- 3-pole (3P) miniature circuit breaker.
- 3 A rated current.
- Z curve tripping characteristic.
- 10 kA rated breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Current limiting performance for enhanced equipment protection.
- Compatible with ABB modular accessories.
Sensitive Circuit Protection for Industrial Control Systems
Miniature circuit breakers such as the ABB S203M-Z3 protect electrical circuits by disconnecting the supply when overload or short circuit conditions occur. The thermal mechanism responds to sustained overloads, while the magnetic mechanism provides rapid disconnection during short circuit faults.
The Z curve characteristic is designed for applications requiring fast tripping at relatively low fault current levels, making this MCB ideal for sensitive electronics, instrumentation, control circuits and semiconductor protection. Its 3-pole format supports three-phase circuit protection within a compact DIN rail mounted design.
Typical Applications
- Industrial control panels.
- PLC and automation systems.
- Electronic control circuits.
- Measuring and instrumentation circuits.
- Semiconductor equipment protection.
- Commercial distribution boards.
