ABB S303P-K0.3NA miniature circuit breaker with a 0.3 A rating, Type K tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£249.05
The ABB 2CDS383103R0117, also known as the S303P-K0.3NA, is a premium miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial and commercial electrical installations. As part of the trusted ABB S300P System pro M compact series, it is engineered for applications requiring exceptional fault protection, compact installation and long-term operational reliability.
This model features a 3P+N configuration, protecting all three phase conductors while providing a switched neutral pole. Its Type K tripping characteristic makes it particularly suitable for inductive loads with high inrush currents, including motors, transformers and industrial control equipment where standard Type B or C breakers may not be appropriate.
With a rated current of 0.3 A, a maximum operating voltage of 415 V AC and a 25 kA breaking capacity, the S303P-K0.3NA delivers dependable circuit protection for specialist industrial applications. Its compact DIN rail mounting design simplifies installation in electrical distribution boards and control panels.
The ABB S303P-K0.3NA automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping protect sensitive electrical equipment, wiring systems and industrial installations from damage while improving operational safety.
Its Type K tripping characteristic is specifically developed for circuits supplying motors, transformers and other inductive equipment where higher starting currents occur. Combined with ABB's high breaking capacity and proven construction, it provides dependable protection in demanding industrial environments.
| Current | 0.3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-K0.3NA |
| Product ID | 2CDS383103R0117 |
| Product type | Miniature circuit breaker |
| Rated current | 0.3 A |
| Tripping characteristic | Type K |
| Number of poles | 3P+N |
| Number of protected poles | 3 |
| Rated operating voltage | Up to 415 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA |
| Rated insulation voltage | 500 V |
| Impulse withstand voltage | 6 kV |
| Protection rating | IP20 terminals / IP40 when installed in enclosure |
| Mounting type | DIN rail mounting |
| Module width | 4 modules |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| EAN | 4016779077323 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits, particularly those supplying inductive loads with high starting currents.
This miniature circuit breaker has a rated operational current of 0.3 A.
Type K circuit breakers are designed for circuits with higher inrush currents, making them well suited for motors, transformers and similar inductive equipment.
The ABB S303P-K0.3NA provides a high breaking capacity of 25 kA for demanding industrial installations.
The breaker is designed for quick installation onto a standard DIN rail within switchboards, distribution boards and industrial control panels.
ABB S300P miniature circuit breakers are widely trusted by electrical engineers, OEM machine builders and panel manufacturers for delivering dependable protection, excellent reliability and compliance with international electrical standards.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...