ABB S301P-B40 single-pole miniature circuit breaker with a 40 A rated current, B tripping characteristic and 25 kA breaking capacity for industrial and commercial circuit protection.
£42.81
The ABB S301P-B40 (2CDS381001R0405) is a premium single-pole 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 S300P series, it combines high breaking capacity with compact dimensions, making it ideal for demanding applications requiring reliable circuit protection.
Featuring a B tripping characteristic, the S301P-B40 is ideal for protecting resistive loads and general electrical circuits where low inrush currents are expected. Its robust thermal and magnetic trip mechanisms provide fast fault detection while helping to protect connected equipment, wiring and distribution systems.
With a 40 A rated current, single-pole configuration and DIN rail mounting, this miniature circuit breaker is well suited to commercial buildings, industrial control panels, switchboards and OEM machinery where dependable protection and easy installation are essential.
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur, helping to protect wiring, distribution equipment and connected electrical devices from damage. Their resettable design allows power to be restored quickly once the fault has been corrected.
The ABB S300P range is widely specified by electrical engineers, panel builders and OEM manufacturers thanks to its dependable operation, compact construction and compliance with internationally recognised electrical standards.
| Current | 40 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S301P-B40 |
| SKU | 2CDS381001R0405 |
| EAN | 4016779080187 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Tripping characteristic | B |
| Number of poles | 1P |
| Rated operational voltage | 415 V AC |
| Rated DC voltage | 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA |
| Protection rating | IP20 (IP40 in enclosure) |
| 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-B40 protects electrical circuits against overloads and short circuits in industrial and commercial installations.
This miniature circuit breaker has a 40 A rated current.
The B characteristic is intended for general-purpose circuits with low inrush currents, making it suitable for lighting, heating and standard distribution circuits.
The circuit breaker is designed for installation onto a standard DIN rail inside distribution boards and industrial control panels.
It is commonly used in commercial buildings, industrial facilities, OEM machinery and electrical distribution systems.
ABB S300P miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers 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...