ABB 2CDS381103R0405 S301P-B40NA miniature circuit breaker with a 40 A rating, Type B tripping characteristic, 1P+N configuration and 25 kA breaking capacity for industrial and commercial electrical protection.
£83.35
The ABB 2CDS381103R0405, also identified as the S301P-B40NA, is a premium miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S300P series. Designed for demanding industrial and commercial electrical installations, it delivers dependable protection against overloads and short circuits while ensuring reliable operation in critical power distribution systems.
Manufactured to ABB's high engineering standards, this MCB combines robust construction with a compact modular design for easy DIN rail installation. Its integrated trip indication, fail-safe screw terminals and high interruption capacity make it suitable for modern switchboards, machine panels and industrial control systems.
Featuring a 40 A rated current, a Type B tripping characteristic, a 1P+N configuration and a 25 kA breaking capacity according to IEC 60947-2, the ABB 2CDS381103R0405 is ideal for protecting resistive loads, commercial distribution circuits and sensitive electrical installations.
Miniature circuit breakers automatically disconnect electrical circuits whenever overload or short circuit conditions occur. The Type B tripping curve is particularly suitable for circuits supplying resistive loads, lighting systems and equipment with relatively low inrush currents, providing fast and dependable protection.
ABB's S300P range is engineered to provide long service life, high interruption performance and dependable operation in industrial, commercial and OEM electrical systems. Its compact modular construction makes it easy to integrate into new or existing installations.
| Current | 40 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S300P |
| Model | 2CDS381103R0405 |
| Extended product type | S301P-B40NA |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Tripping characteristic | Type B |
| Number of poles | 1P+N |
| Protected poles | 1 |
| Rated voltage | 240 V AC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Breaking capacity | 25 kA (IEC 60947-2) |
| Breaking capacity (EN 60898-1) | 20 kA at 230 V AC |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| 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 while switching both the phase and neutral conductors.
The ABB 2CDS381103R0405 has a rated current of 40 A.
Type B circuit breakers provide fast tripping for circuits with relatively low inrush currents, making them suitable for lighting, heating and general electrical distribution.
The breaker protects the phase conductor while simultaneously switching the neutral conductor for improved circuit isolation.
The device is designed for quick installation onto standard DIN rails using secure screw terminal connections.
ABB System pro M Compact S300P miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for dependable circuit protection, robust construction and reliable long-term performance.
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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...