ABB S303P-B40 three-pole miniature circuit breaker with a 40 A rated current, Type B tripping characteristic and 25 kA breaking capacity for industrial circuit protection.
£149.02
The ABB S303P-B40 (2CDS383001R0405) is a high-performance three-pole miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the advanced ABB S300P series, it provides dependable circuit protection in applications where high breaking capacity, reliable operation and compliance with international standards are essential.
This miniature circuit breaker combines robust electrical performance with a compact modular design for straightforward integration into distribution boards, switchgear assemblies and industrial control panels. Its fail-safe terminals help prevent incorrect conductor insertion, while the ability to supply the device from the top or bottom provides greater flexibility during panel wiring.
With a rated current of 40 A, a Type B tripping characteristic and a rated short-circuit breaking capacity of 25 kA, the S303P-B40 is suitable for three-phase circuits serving resistive loads, lighting systems, heating equipment and other applications with relatively low starting currents.
The ABB S303P-B40 automatically disconnects an electrical circuit when excessive current is caused by an overload or short circuit. This helps protect cables, distribution equipment and connected loads while reducing the risk of damage, downtime and electrical hazards.
Its Type B tripping characteristic is designed for circuits with relatively low inrush currents. This makes the breaker particularly suitable for resistive loads, lighting installations, electric heating equipment and general three-phase distribution circuits.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P |
| Model | S303P-B40 |
| Product ID | 2CDS383001R0405 |
| EAN | 4016779077798 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | Type B |
| Rated AC voltage | 415 V AC |
| Rated DC voltage | 125 V DC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 6 kV |
| Rated breaking capacity | 25 kA |
| Frequency | 50 / 60 Hz |
| Energy-limiting class | 3 |
| Overvoltage category | IV |
| Pollution degree | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.37 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S303P-B40 protects three-phase electrical circuits against overloads and short circuits in industrial and commercial installations.
The ABB S303P-B40 has a rated current of 40 A.
A Type B characteristic is designed for circuits with relatively low starting currents, including resistive loads, lighting systems and electric heating equipment.
The circuit breaker has a rated short-circuit breaking capacity of 25 kA according to IEC 60947-2.
The breaker is mounted on a standard DIN rail inside an electrical distribution board, switchboard or industrial control panel.
ABB S300P miniature circuit breakers are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit protection, high breaking performance and reliable service in demanding industrial installations.
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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...