Why Choose the ABB S303P-K0.5 Miniature Circuit Breaker?
The ABB S303P-K0.5 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial, commercial and OEM electrical installations. As part of the renowned ABB System pro M compact S300P series, it delivers exceptional breaking capacity and reliable operation for demanding applications requiring high fault protection.
Engineered to international standards, the S303P-K0.5 combines excellent electrical performance with a compact DIN rail mounted design, making installation straightforward within switchboards, distribution panels and industrial control cabinets. The integrated trip indicator and robust terminal design further simplify maintenance and improve operational safety.
With a 0.5 A rated current, a K curve tripping characteristic and a 25 kA breaking capacity, the S303P-K0.5 is particularly suited to protecting circuits with higher inrush currents, including motors, transformers and inductive loads.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial installations.
- 0.5 A rated current for sensitive circuit protection.
- K curve tripping characteristic designed for inductive loads and motor circuits.
- 25 kA breaking capacity for demanding electrical systems.
- Integrated trip indication for quick fault identification.
- Fully compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- 0.5 A rated current.
- Three protected poles.
- K curve tripping characteristic.
- 415 V AC rated operational voltage.
- 25 kA rated breaking capacity.
- IP20 protection rating.
- 35 mm DIN rail mounting with fail-safe screw terminals.
Reliable Protection for Industrial Electrical Systems
The ABB S303P-K0.5 automatically disconnects electrical circuits during overload and short-circuit conditions, helping protect valuable equipment and minimise downtime. Its K curve characteristic allows it to accommodate higher inrush currents commonly associated with motors, transformers and other inductive equipment while maintaining effective circuit protection.
Manufactured to ABB's high quality standards, the S300P range is trusted worldwide for dependable performance, long service life and compliance with international electrical safety requirements.
Typical Applications
- Industrial motor protection circuits.
- Transformer protection.
- OEM machinery and equipment.
- Industrial control panels.
- Commercial switchboards.
- Electrical distribution systems.
