ABB 2CDS381103R0505 S301P-B50NA miniature circuit breaker featuring a 50 A rating, Type B tripping characteristic, 1P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£89.28
The ABB 2CDS381103R0505, also known as the S301P-B50NA, is a premium miniature circuit breaker (MCB) from the renowned ABB System pro M Compact S300P series. Designed for industrial and commercial electrical installations, it provides dependable protection against overloads and short circuits whilst delivering excellent long-term reliability for high-capacity electrical circuits.
Manufactured to international IEC and UL standards, the S301P-B50NA combines ABB's proven engineering with a compact DIN rail-mounted design. Integrated trip indication, fail-safe screw terminals and compatibility with ABB System pro M Compact accessories ensure straightforward installation, maintenance and future system expansion.
With a 50 A rated current, a Type B tripping characteristic, a 1P+N configuration and a 25 kA ultimate breaking capacity, the ABB 2CDS381103R0505 is ideally suited to protecting resistive loads, distribution circuits and commercial electrical installations where fast fault disconnection is required.
Miniature circuit breakers automatically disconnect electrical circuits whenever overload or short-circuit conditions occur. The Type B tripping characteristic is designed for circuits with low inrush currents, making it ideal for resistive loads such as lighting, heating systems and general-purpose power distribution where rapid fault disconnection is essential.
The ABB S300P range offers outstanding interruption performance, long service life and worldwide approvals, making it a preferred choice for industrial automation, commercial electrical installations, OEM equipment and electrical distribution systems.
| Current | 50 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S300P |
| Model | 2CDS381103R0505 |
| Extended product type | S301P-B50NA |
| Product type | Miniature circuit breaker (MCB) |
| EAN | 4016779079273 |
| Rated current | 50 A |
| Tripping characteristic | Type B |
| Number of poles | 1P+N |
| Protected poles | 1 |
| Rated voltage | 240 V AC |
| Maximum operating voltage | 480Y / 277 V AC |
| Rated DC voltage | 72 V DC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Ultimate breaking capacity (Icu) | 25 kA |
| Rated breaking capacity (Icn) | 15 kA (IEC/EN 60898-1) |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88 × 35 × 69 mm |
| Weight | approx. 0.248 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects commercial and industrial electrical circuits against overloads and short circuits, particularly resistive loads such as lighting, heating systems and general-purpose distribution circuits.
The ABB 2CDS381103R0505 has a 50 A rated current.
Type B circuit breakers provide rapid magnetic tripping at relatively low fault current levels, making them ideal for resistive loads and circuits with low inrush currents.
The breaker protects the phase conductor while simultaneously switching the neutral conductor to improve circuit isolation during maintenance and fault conditions.
The device is designed for quick installation onto a standard DIN rail using secure screw terminal connections.
ABB System pro M Compact S300P miniature circuit breakers are trusted worldwide by electrical engineers, OEM manufacturers and panel builders for dependable protection, high interruption capacity and long-term reliability across commercial and industrial electrical installations.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...