Why Choose the ABB S303P-K20NA Miniature Circuit Breaker?
The ABB S303P-K20NA, product code 2CDS383103R0487, is a premium miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial electrical installations. As part of the trusted ABB System pro M compact S300P series, it delivers exceptional reliability, high breaking capacity and long service life for demanding industrial applications.
Featuring a Type K tripping characteristic, the S303P-K20NA is specifically engineered for circuits with high inrush currents, making it ideal for protecting motors, transformers, contactors, solenoids and other inductive loads. Its combined thermal and magnetic trip mechanisms provide rapid fault clearance while reducing nuisance tripping during equipment start-up.
With a rated current of 20 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-K20NA is ideally suited to industrial distribution boards, machine control panels and OEM equipment. Its compact DIN rail mounting format enables straightforward installation while maintaining full compatibility with ABB System pro M compact accessories.
Key Advantages
- Reliable overload and short-circuit protection.
- 20 A rated current for industrial motor and control circuits.
- Type K tripping characteristic for inductive loads with high inrush currents.
- 3P+N configuration with switched neutral.
- 25 kA breaking capacity for demanding industrial installations.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- 20 A nominal current rating.
- Type K tripping characteristic.
- Three protected poles plus switched neutral.
- Rated operational voltage up to 415 V AC.
- 25 kA IEC 60947-2 breaking capacity.
- Integrated trip indication for rapid fault identification.
- DIN rail mounting with dual release mechanism.
Reliable Protection for Industrial Motor Circuits
Miniature circuit breakers automatically disconnect electrical circuits whenever overloads or short circuits occur. The ABB S303P-K20NA combines thermal overload protection with rapid magnetic fault interruption, helping protect motors, transformers, machinery, cables and connected electrical equipment against excessive current and fault conditions.
Its Type K tripping characteristic is optimised for industrial motor circuits and inductive loads that experience high starting currents. This enables dependable protection while reducing nuisance tripping during equipment start-up, making the breaker an excellent choice for machine builders, panel manufacturers and industrial automation systems.
Typical Applications
- Motor starter circuits.
- Industrial machinery and manufacturing equipment.
- Automation and control panels.
- Transformer and inductive load protection.
- Three-phase industrial distribution systems.
- OEM machine building applications.
