Why Choose the ABB 2CDS383103R0607 S303P-K63NA Miniature Circuit Breaker?
The ABB 2CDS383103R0607, also identified as the S303P-K63NA, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the established ABB System pro M compact S300P series, it combines dependable circuit protection with a high breaking capacity for demanding power distribution, machinery and automation applications.
This circuit breaker features a Type K tripping characteristic, making it particularly suitable for motors, transformers, solenoids and other inductive loads that can generate elevated inrush currents during start-up. Its thermal release provides overload protection, while the magnetic release rapidly disconnects the circuit when a short-circuit fault occurs.
With a rated current of 63 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-K63NA is suitable for three-phase industrial distribution systems with a switched neutral. Its 25 kA breaking capacity and DIN-rail mounting format support reliable installation in switchboards, control panels and industrial machinery.
Key Advantages
- Industrial miniature circuit breaker for overload and short-circuit protection.
- 63 A rated current for higher-power industrial circuits.
- 3P+N pole configuration for three-phase systems with neutral.
- Type K tripping characteristic suitable for inductive loads with high starting currents.
- 25 kA short-circuit breaking capacity for demanding installations.
- Thermal and magnetic releases provide comprehensive circuit protection.
- DIN-rail mounting supports efficient control-panel installation.
- Compatible with accessories from the ABB System pro M compact range.
Key Features
- ABB System pro M compact S300P series.
- S303P-K63NA extended product type.
- 63 A rated current.
- 415 V AC rated operational voltage.
- 3P+N pole arrangement.
- Type K tripping characteristic.
- 25 kA ultimate short-circuit breaking capacity.
- Designed for 50 / 60 Hz electrical systems.
- Compact modular format for electrical enclosures.
- Standard 35 mm DIN-rail mounting.
Reliable Circuit Protection for Industrial Systems
The ABB S303P-K63NA automatically disconnects an electrical circuit when an overload or short circuit is detected. This helps protect cables, switchgear, machinery and connected equipment from excessive current, reducing the likelihood of electrical damage and unplanned production downtime.
Its Type K operating characteristic allows the breaker to tolerate the temporary starting currents associated with inductive equipment while maintaining rapid protection during genuine fault conditions. This makes it a practical solution for industrial circuits supplying motors, transformers, pumps and production machinery.
Typical Applications
- Industrial motors and motor control circuits.
- Transformers and inductive electrical loads.
- Factory automation and production machinery.
- Three-phase electrical distribution boards.
- Pumps, compressors and ventilation equipment.
- OEM machinery and control-panel construction.
- Commercial and industrial switchboards.
