ABB S301P-K20 single-pole miniature circuit breaker with a 20 A rated current, K tripping characteristic and 25 kA breaking capacity for industrial circuit protection.
£48.11
The ABB S301P-K20 (2CDS381001R0487) is a premium single-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in demanding industrial electrical installations. As part of the proven ABB S300P series, it delivers outstanding reliability, a high breaking capacity and compliance with international IEC and UL standards for industrial applications.
Featuring a K tripping characteristic, the S301P-K20 is specifically engineered for circuits supplying motors, transformers, solenoids and other inductive loads with higher inrush currents. Its thermal and magnetic trip mechanisms minimise nuisance tripping during start-up while providing rapid protection against electrical faults.
With a 20 A rated current, single-pole configuration and DIN rail mounting, this miniature circuit breaker is ideally suited to industrial control panels, OEM machinery, automation equipment and commercial electrical distribution systems requiring dependable circuit protection.
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur, helping to protect wiring, motors, machinery and connected equipment from electrical damage. Their resettable design enables systems to be restored quickly once faults have been safely resolved.
The K tripping characteristic is ideal for applications with elevated starting currents, allowing motors, transformers and inductive equipment to operate normally during start-up while maintaining dependable fault protection.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S301P-K20 |
| SKU | 2CDS381001R0487 |
| EAN | 4016779080101 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Tripping characteristic | K |
| Number of poles | 1P |
| Rated voltage | 240 V AC |
| Rated DC voltage | 72 V DC |
| Maximum operating voltage (UL/CSA) | 480Y/277 V AC, 125 V DC |
| Frequency | 50 / 60 Hz |
| Ultimate breaking capacity (Icu) | 25 kA |
| Service breaking capacity (Ics) | 12.5 kA |
| Protection rating | IP20 (IP40 when installed in an enclosure) |
| Rated insulation voltage (Ui) | 500 V |
| Impulse withstand voltage (Uimp) | 6 kV |
| Operating temperature | -40 °C to +70 °C |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 17.5 × 67.6 mm |
| Weight | Approx. 0.124 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S301P-K20 protects industrial electrical circuits against overloads and short circuits, particularly those supplying motors, transformers and other inductive equipment.
The ABB S301P-K20 has a 20 A rated current.
The K characteristic is designed for applications with higher inrush currents, making it suitable for motors, transformers, solenoids and similar inductive loads.
The circuit breaker offers an ultimate short-circuit breaking capacity of 25 kA and a service breaking capacity of 12.5 kA at 240 V AC.
The circuit breaker mounts onto a standard DIN rail inside electrical distribution boards, industrial control panels and machinery enclosures.
ABB S300P miniature circuit breakers are trusted by electrical engineers, OEM manufacturers and panel builders worldwide for delivering dependable circuit protection, high performance and long service life.
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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...