ABB S301P-B20NA miniature circuit breaker with 20 A rated current, Type B tripping characteristic, 1P+N configuration and 25 kA breaking capacity for industrial and commercial electrical protection.
£68.45
The ABB 2CDS381103R0205, also known as the S301P-B20NA, is a premium 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 System pro M compact S300P series, it is manufactured to international IEC and UL standards, making it suitable for demanding applications requiring reliable circuit protection.
Featuring a 20 A rated current, a Type B tripping characteristic and a high 25 kA short-circuit breaking capacity, the S301P-B20NA is ideal for protecting lighting circuits, distribution systems, resistive loads and general-purpose electrical equipment. Its Type B characteristic provides fast disconnection under overload conditions, making it particularly suitable for circuits with low inrush currents.
With a 1P+N pole configuration, a 240 V AC rated operational voltage and compatibility with selected 72 V DC applications, the S301P-B20NA offers flexible circuit protection. Its compact DIN rail mounting, fail-safe bi-directional screw terminals and contact position indication simplify installation and maintenance inside electrical distribution boards and industrial control panels.
The ABB S301P-B20NA automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping protect wiring, distribution equipment and connected electrical devices from damage. Its thermal and magnetic trip mechanisms ensure reliable operation and long service life in demanding environments.
Designed for industrial applications, the ABB S300P range combines high breaking performance with compact dimensions and dependable construction. It is widely used by panel builders, OEMs and electrical contractors where reliable protection and compliance with international standards are essential.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S301P-B20NA |
| Product ID | 2CDS381103R0205 |
| EAN | 4016779079600 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Tripping characteristic | Type B |
| Number of poles | 1P+N |
| Rated AC voltage | 240 V AC |
| Rated DC voltage | 72 V DC |
| Frequency | 50 / 60 Hz |
| Short-circuit breaking capacity | 25 kA |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail mounting |
| Terminal capacity | 0.75 to 35 mm² solid, 0.75 to 25 mm² stranded |
| Insulation voltage (Ui) | 500 V |
| Impulse withstand voltage (Uimp) | 6 kV |
| Electrical endurance | 20,000 operating cycles |
| Operating temperature | -40°C to +70°C |
| Dimensions (H × W × D) | approx. 88 × 35 × 69 mm |
| Weight | approx. 0.236 kg |
| Country of origin | Germany |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
This miniature circuit breaker protects electrical circuits against overloads and short circuits in industrial and commercial installations.
The ABB S301P-B20NA has a rated current of 20 A.
Type B circuit breakers trip quickly at relatively low inrush currents, making them ideal for lighting circuits and other resistive electrical loads.
The ABB S301P-B20NA provides a high 25 kA short-circuit breaking capacity.
The circuit breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
ABB System pro M compact S300P miniature circuit breakers are trusted worldwide for delivering reliable overload and short-circuit protection in industrial, commercial and infrastructure applications.
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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...