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2CDS381001R0405 ABB S301P-B40 Miniature Circuit Breaker – 1P – B – 40 A
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.
£23.55
Why Choose the ABB S301P-B40 Miniature Circuit Breaker?
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.
Key Advantages
- Compact single-pole miniature circuit breaker for industrial and commercial installations.
- 40 A rated current with B tripping characteristic.
- Reliable overload and short-circuit protection.
- High 25 kA breaking capacity for demanding installations.
- Quick DIN rail mounting simplifies installation.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB S300P miniature circuit breaker series.
- 40 A rated current.
- B tripping characteristic.
- Single-pole (1P) configuration.
- Rated operational voltage up to 415 V AC.
- 25 kA short-circuit breaking capacity.
- Thermal and magnetic trip protection.
- DIN rail mounting.
- IP20 terminals and IP40 when installed in an enclosure.
- Integrated trip indicator and fail-safe terminals.
Reliable Circuit Protection for Electrical Installations
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.
Typical Applications
- Commercial electrical distribution boards.
- Industrial control panels.
- OEM machinery and equipment.
- Building services installations.
- Lighting and power distribution circuits.
- General industrial electrical systems.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 25 kA | |
| 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 |
Frequently Asked Questions
What is the ABB S301P-B40 used for?
The S301P-B40 protects electrical circuits against overloads and short circuits in industrial and commercial installations.
What is the rated current of this circuit breaker?
This miniature circuit breaker has a 40 A rated current.
What does the B tripping characteristic mean?
The B characteristic is intended for general-purpose circuits with low inrush currents, making it suitable for lighting, heating and standard distribution circuits.
How is the S301P-B40 installed?
The circuit breaker is designed for installation onto a standard DIN rail inside distribution boards and industrial control panels.
Where is this miniature circuit breaker commonly used?
It is commonly used in commercial buildings, industrial facilities, OEM machinery and electrical distribution systems.
Trusted by Electrical Professionals Worldwide
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.
