ABB S301P-B50 single-pole miniature circuit breaker with a 50 A rated current, B tripping characteristic and 25 kA breaking capacity for industrial and commercial circuit protection.
£45.88
The ABB S301P-B50 (2CDS381001R0505) is a premium single-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in demanding industrial and commercial electrical installations. As part of the trusted ABB System pro M compact S300P series, it combines exceptional reliability, a high breaking capacity and compliance with international IEC and UL standards.
Featuring a B tripping characteristic, the S301P-B50 is ideal for circuits with low inrush currents, providing fast disconnection to protect lighting circuits, resistive loads, control panels and other sensitive electrical installations. Its precision thermal and magnetic trip mechanisms help safeguard equipment whilst minimising downtime.
With a 50 A rated current, single-pole configuration and DIN rail mounting, this miniature circuit breaker is perfectly suited to industrial control panels, commercial distribution boards, OEM machinery and electrical installations requiring dependable circuit protection.
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur, protecting wiring, equipment and connected devices from electrical damage. Their resettable design allows systems to be quickly restored once faults have been safely corrected.
The B tripping characteristic is ideal for circuits with relatively low inrush currents, including lighting installations, resistive heating loads, office equipment and general-purpose commercial electrical systems where rapid fault clearance is required.
| Current | 50 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S301P-B50 |
| SKU | 2CDS381001R0505 |
| EAN | 4016779080064 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 50 A |
| Tripping characteristic | B |
| Number of poles | 1P |
| Rated AC voltage | 415 V AC |
| Rated DC voltage | 125 V DC |
| Frequency | 50 / 60 Hz |
| Ultimate breaking capacity (Icu) | 25 kA |
| Protection rating | IP20 (IP40 when installed in a suitable 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 × 69 mm |
| Weight | Approx. 0.124 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S301P-B50 protects electrical circuits against overloads and short circuits, particularly lighting circuits and other low inrush current applications.
The ABB S301P-B50 has a 50 A rated current.
The B characteristic provides rapid magnetic tripping for circuits with low inrush currents, making it suitable for lighting, resistive loads and commercial electrical installations.
The circuit breaker provides an ultimate short-circuit breaking capacity of 25 kA.
The circuit breaker mounts onto a standard DIN rail inside distribution boards, industrial control panels and electrical enclosures.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers worldwide for delivering dependable circuit protection, exceptional performance and long-term reliability.
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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...