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 motor and circuit protection.
£167.54
The ABB S303P-K20 (2CDS383001R0487) is a high-performance three-pole miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. Part of the dependable ABB S300P series, it combines robust construction, high breaking capacity and reliable switching performance for demanding three-phase applications.
Manufactured in accordance with recognised IEC and UL standards, the S303P-K20 is suitable for installation in industrial control panels, switchgear assemblies and power distribution systems. Its compact modular design supports efficient DIN rail installation, while fail-safe terminals help prevent incorrect conductor insertion.
With a rated current of 20 A, a Type K tripping characteristic and a rated short-circuit breaking capacity of 25 kA, this circuit breaker is particularly well suited to motors, transformers, solenoids and other inductive loads with elevated starting currents.
The ABB S303P-K20 automatically disconnects the electrical supply when excessive current is caused by an overload or short circuit. This helps protect cables, motors and connected equipment while reducing the risk of electrical damage, production interruptions and unplanned downtime.
Its Type K characteristic accommodates the elevated inrush currents commonly produced when motors, transformers and other inductive devices start. This helps minimise nuisance tripping while maintaining dependable protection during genuine fault conditions.
| Current | 20 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-K20 |
| Product ID | 2CDS383001R0487 |
| EAN | 4016779077712 |
| 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 |
| Frequency | 50 / 60 Hz |
| Terminal type | Screw terminal |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Modular width | 3 modules |
| 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 circuits against overloads and short circuits, particularly circuits supplying motors, transformers and other inductive equipment.
The ABB S303P-K20 has a rated current of 20 A.
A Type K characteristic is designed for equipment with relatively high starting currents, including motors, transformers, solenoids and other inductive loads.
The circuit breaker has a rated short-circuit breaking capacity of 25 kA.
The breaker mounts on a standard DIN rail inside an industrial control panel, switchboard or electrical distribution enclosure.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and machine manufacturers for dependable protection, high breaking performance and reliable operation in demanding industrial installations.
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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...