Why Choose the ABB S203-K3 Miniature Circuit Breaker?
The ABB S203-K3 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 circuit protection for commercial, industrial and control panel installations.
With a K tripping characteristic, the S203-K3 is suitable for circuits with higher inrush currents, helping reduce nuisance tripping while maintaining effective protection. This makes it a practical choice for selected inductive loads, transformers, control circuits and automation equipment.
Rated at 3 A with a 3-pole configuration and 6 kA short-circuit breaking capacity, the ABB S203-K3 provides effective protection for three-phase low-current circuits. Its DIN rail mounting design allows fast installation in distribution boards, machine panels and electrical enclosures.
Key Advantages
- 3-pole miniature circuit breaker for three-phase circuit protection.
- 3 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 reliable 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-K3 miniature circuit breaker.
- S200 series modular protection device.
- 3 protected poles.
- 3 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 Low-Current Three-Phase Circuits
Miniature circuit breakers such as the ABB S203-K3 automatically disconnect a circuit when excessive current is detected. The thermal tripping mechanism provides overload protection, while the electromechanical tripping mechanism responds quickly to short-circuit faults.
The K curve characteristic is designed for circuits where inrush currents may occur during normal operation. This makes the S203-K3 suitable for selected inductive loads, transformer circuits, automation equipment and control systems where standard tripping characteristics may not be ideal.
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 auxiliary and power circuits.
