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.
