Why Choose the ABB S203-K5 Miniature Circuit Breaker?
The ABB S203-K5 is a compact and reliable 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the ABB System pro M compact S200 range, it provides dependable modular protection for residential, commercial and industrial installations.
With a K tripping characteristic, the S203-K5 is suited to circuits with higher inrush currents, helping reduce nuisance tripping while maintaining effective protection. This makes it suitable for selected inductive loads, transformers, motor circuits and industrial control applications.
Rated at 5 A with a 3-pole configuration and 6 kA short-circuit breaking capacity, the ABB S203-K5 provides effective protection for three-phase low-current circuits. Its DIN rail mounting design allows fast installation in distribution boards, control panels and machine cabinets.
Key Advantages
- 3-pole miniature circuit breaker for three-phase circuit protection.
- 5 A rated current suitable for low-current power and control circuits.
- K curve tripping characteristic for circuits with higher inrush currents.
- 6 kA breaking capacity for dependable short-circuit protection.
- Part of the ABB System pro M compact S200 range.
- DIN rail mounting for efficient panel and board installation.
Key Features
- ABB S203-K5 miniature circuit breaker.
- S200 series modular protection device.
- 3 protected poles.
- 5 A rated current.
- K characteristic trip curve.
- 6 kA rated short-circuit capacity.
- Thermal-magnetic tripping for overload and short-circuit protection.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for Three-Phase Circuits
Miniature circuit breakers such as the ABB S203-K5 automatically disconnect the circuit when excessive current is detected. The delayed thermal trip mechanism provides overload protection, while the electromechanical trip mechanism reacts quickly to short-circuit faults.
The K curve characteristic is designed for applications where temporary inrush currents may occur during normal operation. This makes the S203-K5 a practical choice for selected transformers, inductive loads, motor circuits and automation equipment.
Typical Applications
- Three-phase control circuits.
- Industrial automation panels.
- Transformer and inductive load protection.
- Machine building and OEM equipment.
- Commercial and industrial distribution boards.
- Low-current motor and auxiliary circuits.
