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2CDS383001R0405 ABB S303P-B40 Miniature Circuit Breaker – 3P – B – 40 A
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.
£81.96
Why Choose the ABB S303P-B40 Miniature Circuit Breaker?
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.
Key Advantages
- Reliable overload and short-circuit protection for industrial installations.
- 40 A rated current for three-phase distribution circuits.
- Type B tripping characteristic suitable for resistive and low-inrush loads.
- 25 kA rated breaking capacity for demanding electrical systems.
- Three protected poles provide coordinated protection across three-phase circuits.
- Compact DIN rail design simplifies installation inside control and distribution panels.
Key Features
- ABB S300P miniature circuit breaker series.
- Three-pole configuration with three protected poles.
- 40 A rated current.
- Type B tripping characteristic.
- Rated operating voltage of up to 415 V AC.
- Rated operating voltage of up to 125 V DC.
- 25 kA breaking capacity according to IEC 60947-2.
- Integrated contact and trip indication for clear status monitoring.
- Fail-safe terminals designed to support secure conductor installation.
- Top or bottom supply connection for flexible panel wiring.
Reliable Protection for Industrial Electrical Systems
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.
Typical Applications
- Industrial power distribution boards.
- Three-phase lighting circuits.
- Electric heating equipment.
- Resistive industrial loads.
- Commercial and industrial control panels.
- OEM machinery and electrical installations.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 25 kA | |
| 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 |
Frequently Asked Questions
What is the ABB S303P-B40 used for?
The S303P-B40 protects three-phase electrical circuits against overloads and short circuits in industrial and commercial installations.
What is the rated current of this circuit breaker?
The ABB S303P-B40 has a rated current of 40 A.
What does the Type B tripping characteristic mean?
A Type B characteristic is designed for circuits with relatively low starting currents, including resistive loads, lighting systems and electric heating equipment.
What is the breaking capacity of the S303P-B40?
The circuit breaker has a rated short-circuit breaking capacity of 25 kA according to IEC 60947-2.
How is the ABB S303P-B40 installed?
The breaker is mounted on a standard DIN rail inside an electrical distribution board, switchboard or industrial control panel.
Trusted by Industrial Professionals Worldwide
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.
