Why Choose the ABB S203-K1 Miniature Circuit Breaker?
The ABB S203-K1 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed to provide dependable overload and short circuit protection, it is ideal for industrial machinery, control systems and OEM equipment requiring reliable protection for low current, high inrush applications.
Featuring a K tripping characteristic, the S203-K1 is specifically engineered for circuits with high starting currents while maintaining a low rated current. This makes it particularly suitable for protecting motors, transformers, contactors, solenoids and other inductive loads where conventional B or C curve breakers may nuisance trip. The dual thermal and magnetic tripping mechanisms ensure dependable protection under demanding operating conditions.
With a 1 A rated current, three-pole configuration and a 6 kA short circuit breaking capacity, this DIN rail mounted miniature circuit breaker offers reliable protection, straightforward installation and compliance with IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 standards.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial applications.
- K curve tripping characteristic for high inrush current loads.
- 1 A rated current for sensitive circuit protection.
- 6 kA breaking capacity for dependable fault interruption.
- Thermal and magnetic trip mechanisms provide reliable overload and short circuit protection.
- DIN rail mounting for quick installation inside switchboards and control panels.
Key Features
- ABB System pro M Compact S200 series.
- Three-pole (3P) configuration.
- 1 A rated current.
- K tripping characteristic.
- 6 kA rated short circuit breaking capacity.
- Suitable for AC/DC applications.
- Failsafe bi-directional cylinder-lift screw terminals.
- Compatible with ABB S200 auxiliary contacts and accessories.
Reliable Circuit Protection for High Inrush Applications
The ABB S203-K1 combines delayed thermal overload protection with instantaneous magnetic short circuit protection to safeguard sensitive circuits while accommodating high starting currents. This makes it particularly suitable for specialised industrial applications where low current protection and high inrush tolerance are both required.
Its K characteristic is widely used for motor control circuits, transformers, magnetic devices and other inductive equipment. The compact design enables efficient installation within switchboards, machine control panels and industrial distribution systems.
Typical Applications
- Motor control circuits.
- Industrial machinery.
- Transformers and inductive loads.
- Control panels and switchgear.
- OEM automation equipment.
- Machine building applications.
