Why Choose the ABB S203-K4 Miniature Circuit Breaker?
The ABB S203-K4 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Featuring a 4 A current rating and a K tripping characteristic, it is specifically designed to provide reliable protection for circuits supplying motors, transformers, solenoids and other inductive loads with elevated starting currents. It delivers dependable overload and short circuit protection across industrial, commercial and OEM electrical installations.
Manufactured to ABB's renowned engineering standards, the S203-K4 incorporates thermal overload protection alongside fast electromagnetic short circuit protection. Its compact DIN rail mounted design enables straightforward installation within switchboards, distribution boards and industrial control panels while providing excellent long-term reliability.
Designed in accordance with recognised international standards, the ABB S203-K4 is ideal for machine builders, panel manufacturers and electrical contractors requiring dependable protection for motor control circuits and inductive electrical equipment.
Key Advantages
- Three-pole miniature circuit breaker for three-phase installations.
- 4 A rated current for low-current industrial applications.
- K tripping characteristic optimised for inductive loads.
- Reliable overload and short circuit protection.
- Compact DIN rail mounting for quick installation.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB System pro M Compact S200 series.
- Model: S203-K4.
- 4 A rated current.
- Three protected poles (3P).
- K curve tripping characteristic.
- Thermal and electromagnetic trip mechanisms.
- 6 kA breaking capacity to IEC/EN 60898-1.
- DIN rail mounting for switchboards and control panels.
Reliable Protection for Motor Control Applications
The ABB S203-K4 is engineered to disconnect electrical circuits safely during overloads and short circuits while allowing the temporary high starting currents associated with motors, transformers and inductive equipment. Its K characteristic reduces nuisance tripping during normal equipment start-up while maintaining dependable protection.
As part of ABB's proven System pro M Compact range, the S203-K4 offers excellent reliability, straightforward installation and compatibility with a comprehensive range of auxiliary contacts, signalling devices and shunt trips for complete electrical distribution solutions.
Typical Applications
- Motor control circuits.
- Industrial machinery.
- Transformer protection.
- Industrial control panels.
- OEM equipment.
- Commercial and industrial electrical distribution.
