Why Choose the ABB 2CDS383103R0577 S303P-K50NA Miniature Circuit Breaker?
The ABB 2CDS383103R0577, also identified as the S303P-K50NA, is a high-performance miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the proven ABB System pro M compact S300P series, it offers exceptional reliability, a high breaking capacity and compliance with international standards for demanding industrial applications.
Featuring a Type K tripping characteristic, this circuit breaker is ideally suited to motors, transformers, compressors and other inductive loads that generate high inrush currents during start-up. Its combined thermal and magnetic trip mechanism ensures dependable overload protection while rapidly disconnecting short-circuit faults to safeguard equipment and minimise downtime.
With a rated current of 50 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-K50NA is ideal for industrial control panels, switchboards and machine building applications. Its 25 kA breaking capacity, DIN rail mounting and compact design simplify installation while delivering dependable long-term protection.
Key Advantages
- Industrial miniature circuit breaker for overload and short-circuit protection.
- 50 A rated current for demanding industrial power distribution.
- 3P+N pole configuration for three-phase systems with neutral.
- Type K tripping characteristic designed for inductive loads with high starting currents.
- 25 kA ultimate short-circuit breaking capacity.
- Integrated trip indication for rapid fault identification.
- Compatible with ABB System pro M compact accessories.
- Compact DIN rail mounting for efficient installation.
Key Features
- ABB System pro M compact S300P series.
- S303P-K50NA model.
- 50 A rated current.
- 415 V AC rated operational voltage.
- 3P+N pole arrangement.
- Type K tripping characteristic.
- 25 kA rated ultimate short-circuit breaking capacity.
- 50 / 60 Hz operation.
- 35 mm DIN rail mounting.
- Contact position and trip indication.
Reliable Circuit Protection for Industrial Installations
The ABB S303P-K50NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect electrical infrastructure, industrial machinery and connected equipment. Its robust design delivers reliable long-term performance in demanding industrial environments.
Its Type K tripping characteristic is specifically intended for motors and other inductive loads with high inrush currents. This enables reliable equipment start-up while maintaining rapid protection during genuine fault conditions.
Typical Applications
- Industrial machinery.
- Motor control centres.
- Factory automation systems.
- Electrical distribution panels.
- OEM machine building.
- Pumps, compressors and ventilation systems.
- Industrial switchboards.
