Why Choose the ABB S303P-D20NA Miniature Circuit Breaker?
The ABB S303P-D20NA is a robust and high-performance miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the ABB System pro M compact S300P series, it combines high breaking capacity with dependable circuit protection for demanding electrical distribution applications.
This circuit breaker features a D tripping characteristic, making it suitable for circuits where higher short-duration inrush currents can occur. Its 3P+N configuration provides protection across three phases with a switched neutral, while the compact modular design enables straightforward installation in distribution boards and control panels.
With a rated current of 20 A and a rated breaking capacity of 25 kA, the S303P-D20NA provides dependable protection for industrial circuits requiring a high level of short-circuit interruption performance. Its DIN-rail mounting and compatibility with the System pro M compact accessory range simplify installation and system integration.
Key Advantages
- High-performance miniature circuit breaker for industrial electrical installations.
- 20 A rated current for protection of electrical circuits and equipment.
- D tripping characteristic suitable for circuits with higher inrush currents.
- 25 kA rated breaking capacity for high-level short-circuit protection.
- 3P+N configuration with switched neutral for three-phase circuit protection.
- DIN-rail mounting for straightforward installation in electrical distribution equipment.
Key Features
- ABB System pro M compact S300P series.
- S303P-D20NA miniature circuit breaker.
- 20 A rated current.
- D tripping characteristic.
- 25 kA rated breaking capacity.
- 3P+N configuration with switched neutral.
- AC electrical supply.
- DIN-rail mounting for modular electrical installations.
- Integrated trip indication for clear identification of tripping events.
- Compatible with System pro M compact accessories.
Reliable Circuit Protection for Industrial Installations
Miniature circuit breakers such as the ABB S303P-D20NA protect electrical circuits by interrupting current when an overload or short-circuit condition occurs. The D characteristic provides a delayed magnetic response compared with lower trip characteristics, helping accommodate circuits where equipment can generate higher starting or inrush currents.
The S300P series is designed for industrial electrical installations where reliable protection and high short-circuit interruption performance are required. The S303P-D20NA combines three protected phases with a switched neutral in a compact modular device, making it suitable for three-phase distribution and control circuits.
Typical Applications
- Industrial electrical distribution systems.
- Three-phase machinery and equipment circuits.
- Control panels and industrial switchboards.
- Motor and transformer circuits with higher inrush currents.
- Factory automation and production equipment.
- Commercial and industrial low-voltage installations.
