ABB 2CDS383103R0607 S303P-K63NA miniature circuit breaker with a 63 A rated current, 3P+N configuration, Type K tripping characteristic and 25 kA breaking capacity.
£275.68
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.
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.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-K63NA |
| Product ID | 2CDS383103R0607 |
| EAN | 4016779076784 |
| Product type | Miniature circuit breaker |
| Rated current | 63 A |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Neutral pole | Switched |
| Tripping characteristic | Type K |
| Rated operational voltage | Up to 415 V AC |
| Rated frequency | 50 / 60 Hz |
| Ultimate short-circuit breaking capacity | 25 kA |
| Protection function | Overload and short-circuit protection |
| Mounting type | 35 mm DIN rail |
| Installation environment | Industrial distribution boards and control panels |
| Applicable standards | International IEC and UL standards |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
This miniature circuit breaker protects three-phase industrial circuits against overloads and short circuits, particularly circuits supplying motors, transformers and other inductive equipment.
The ABB S303P-K63NA has a rated current of 63 A.
A Type K characteristic is designed for inductive loads with elevated starting currents, helping to prevent nuisance tripping while maintaining dependable fault protection.
The circuit breaker has an ultimate short-circuit breaking capacity of 25 kA, making it suitable for demanding industrial installations.
The breaker mounts onto a standard 35 mm DIN rail inside a suitable industrial control panel, switchboard or electrical distribution enclosure.
ABB System pro M compact S300P miniature circuit breakers provide dependable overload and short-circuit protection for industrial machinery, automation systems and electrical distribution installations.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...