ABB S303P-K20 three-pole miniature circuit breaker with a 20 A rated current, Type K tripping characteristic and 25 kA breaking capacity for industrial circuit protection.
£167.54
The ABB S303P-K20 (2CDS383001R0447) is a premium three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB S300P series, it delivers outstanding electrical performance, high breaking capacity and reliable operation for demanding applications.
Designed to comply with recognised IEC and UL standards, the S303P-K20 combines a compact DIN rail design with robust construction, making it ideal for installation in industrial control panels, switchgear and power distribution systems. Its fail-safe terminals and flexible top or bottom supply connection simplify installation while ensuring secure electrical connections.
With a rated current of 20 A, a Type K tripping characteristic and a 25 kA rated short-circuit breaking capacity, the S303P-K20 is particularly suited to protecting three-phase motors, transformers and other inductive loads with elevated starting currents.
The ABB S303P-K20 automatically disconnects electrical circuits during overload or short-circuit conditions, helping protect cables, motors and connected equipment while reducing downtime and improving system reliability.
Its Type K tripping characteristic is specifically designed for circuits with higher starting currents, making it ideal for industrial motors, transformers, compressors and other inductive loads commonly found in manufacturing and automation environments.
| Current | 13 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-K20 |
| Product ID | 2CDS383001R0447 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | Type K |
| Rated AC voltage | 415 V AC |
| Rated DC voltage | 125 V DC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Rated breaking capacity | 25 kA |
| Ultimate short-circuit breaking capacity | Up to 100 kA at 400 to 440 V AC |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.37 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-K20 protects three-phase industrial electrical circuits against overloads and short circuits, particularly those supplying motors and inductive equipment.
This miniature circuit breaker has a 20 A rated current.
Type K circuit breakers are designed for applications with higher inrush currents, making them suitable for motors, transformers and other inductive loads.
The circuit breaker offers a rated short-circuit breaking capacity of 25 kA, making it suitable for demanding industrial installations.
The breaker is mounted on a standard DIN rail inside industrial control panels, switchboards and electrical distribution systems.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit protection, high breaking performance and reliable operation in demanding industrial environments.
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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...