ABB S303P-K0.5 three-pole miniature circuit breaker featuring a 0.5 A rated current, K curve tripping characteristic and 25 kA breaking capacity for industrial electrical protection.
£203.91
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.
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.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-K0.5 |
| SKU | 2CDS383001R0157 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 0.5 A |
| Tripping characteristic | K Curve |
| Number of poles | 3 |
| Rated operational voltage | 415 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.372 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits, particularly where inductive loads and higher inrush currents are present.
The ABB S303P-K0.5 has a 0.5 A rated current.
The K curve allows higher inrush currents before tripping, making it suitable for motors, transformers and other inductive equipment.
The S303P-K0.5 provides a 25 kA short-circuit breaking capacity for demanding industrial installations.
The breaker mounts directly onto a standard 35 mm DIN rail inside distribution boards and industrial control panels.
ABB System pro M compact miniature circuit breakers are widely trusted by electricians, panel builders and industrial engineers for delivering reliable protection, exceptional performance and long-term operational safety.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...