Why Choose the ABB S203M-K4 Miniature Circuit Breaker?
The ABB S203M-K4 is a high-quality 3-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200M series. Designed for professional circuit protection, it provides reliable overload and short circuit protection for industrial, commercial and OEM electrical installations.
Featuring a K tripping characteristic, the S203M-K4 is particularly suitable for circuits with higher inrush currents, including transformers, motors, control circuits and inductive loads. Its current limiting design helps reduce fault energy, protecting connected equipment and improving installation reliability.
With a 4 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203M-K4 delivers dependable circuit protection in a compact DIN rail mounted format. It is ideal for three-phase electrical systems where precise low-current protection is required.
Key Advantages
- Reliable 3-pole miniature circuit breaker for professional installations.
- 4 A rated current with K tripping characteristic.
- Current limiting technology helps minimise fault energy.
- 10 kA breaking capacity for dependable short circuit protection.
- Suitable for industrial, commercial and OEM machinery applications.
- Compatible with ABB modular accessories and auxiliary devices.
Key Features
- ABB System pro M compact S200M series.
- 3-pole (3P) miniature circuit breaker.
- 4 A rated current.
- K curve tripping characteristic.
- 10 kA rated breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Current limiting performance for enhanced equipment protection.
- DIN rail mounting with contact position indication.
Reliable Circuit Protection for Industrial Installations
Miniature circuit breakers such as the ABB S203M-K4 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 K curve characteristic is designed for circuits with increased inrush current, making this MCB suitable for industrial control systems, transformer circuits, motor control equipment and machinery applications. Its 3-pole construction provides protection for three-phase circuits within a compact DIN rail mounted format.
Typical Applications
- Industrial control panels.
- Machine building and OEM equipment.
- Transformer protection.
- Motor control circuits.
- Commercial electrical installations.
- Automation and process control systems.
