ABB S303P-K6NA miniature circuit breaker with a 6 A current rating, Type K tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£204.57
The ABB S303P-K6NA, product code 2CDS383103R0377, is a high-performance miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial electrical installations. As part of the proven ABB System pro M compact S300P series, it delivers outstanding reliability, high breaking capacity and long service life for demanding industrial environments.
Featuring a Type K tripping characteristic, the S303P-K6NA is specifically engineered for circuits with high inrush currents, making it ideal for protecting motors, transformers, solenoids and other inductive loads. Its thermal and magnetic trip mechanisms provide rapid fault clearance while reducing nuisance tripping during motor starting.
With a rated current of 6 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-K6NA is suitable for industrial distribution boards, machine control panels and OEM equipment. The compact DIN rail mounting format simplifies installation and maintenance while remaining fully compatible with ABB System pro M compact accessories.
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur. The ABB S303P-K6NA combines thermal overload protection with rapid magnetic fault interruption, helping protect motors, machinery, wiring and connected electrical equipment from damage caused by excessive current.
Its Type K characteristic is designed specifically for motor and transformer circuits where higher starting currents are expected. This allows reliable operation while reducing unnecessary tripping during equipment start-up, making it an excellent choice for industrial automation and machine building.
| Current | 6 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-K6NA |
| Product ID | 2CDS383103R0377 |
| Product type | Miniature circuit breaker |
| Rated current | 6 A |
| Tripping characteristic | Type K |
| Pole configuration | 3P+N |
| Total poles | 4 |
| Protected poles | 3 |
| Rated operational voltage | 415 V AC |
| Maximum operating voltage | 480Y/277 V AC, 125 V DC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA (IEC 60947-2) |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Mounting type | DIN rail mounting |
| Terminal type | Screw terminals |
| Conductor capacity | 0.75 to 35 mm² |
| Mechanical endurance | 20,000 operating cycles |
| Electrical endurance | 20,000 operating cycles |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| EAN | 4016779077033 |
| Country of origin | Germany |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S303P-K6NA protects industrial three-phase electrical circuits against overloads and short circuits, particularly those supplying motors and other inductive loads.
The S303P-K6NA has a rated current of 6 A.
Type K circuit breakers are designed to handle higher inrush currents, making them ideal for protecting motors, transformers and similar inductive equipment.
The breaker provides a rated short-circuit breaking capacity of 25 kA in accordance with IEC 60947-2.
The breaker is designed for installation on a standard DIN rail inside industrial control panels, electrical distribution boards and machinery enclosures.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical engineers, panel builders and industrial automation professionals for reliable circuit protection, exceptional performance and long-term durability.
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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...