ABB S303P-K0.75NA miniature circuit breaker with a 0.75 A current rating, Type K tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£249.05
The ABB 2CDS383103R0187, also known as the S303P-K0.75NA, is a high-performance 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 offers exceptional fault-breaking capability, compact dimensions and long-term operational reliability for demanding power distribution systems.
Featuring a 3P+N configuration, the S303P-K0.75NA protects all three phase conductors while incorporating a switched neutral pole. Its Type K tripping characteristic is specifically designed for circuits with high inrush currents, making it ideal for motors, transformers, solenoids, contactors and other inductive industrial loads.
With a rated current of 0.75 A, an operating voltage of up to 415 V AC and a high 25 kA breaking capacity, the ABB S303P-K0.75NA delivers dependable protection for industrial control panels, switchboards and OEM machinery. Its DIN rail mounting design enables fast installation while optimising panel space.
The ABB S303P-K0.75NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect motors, transformers, wiring and connected electrical equipment while improving operational safety and reducing costly downtime.
Its Type K tripping characteristic makes it particularly suitable for inductive loads that generate high starting currents. Combined with ABB's proven S300P platform, it delivers dependable performance across industrial automation, machine building and commercial electrical installations.
| Current | 0.75 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-K0.75NA |
| Product ID | 2CDS383103R0187 |
| Product type | Miniature circuit breaker |
| Rated current | 0.75 A |
| Tripping characteristic | Type K |
| Number of poles | 3P+N |
| Number of protected poles | 3 |
| Rated operating voltage | Up to 415 V AC |
| Voltage type | AC/DC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity (Icn) | 25 kA |
| Rated insulation voltage | 500 V |
| Impulse withstand voltage | 6 kV |
| Protection rating | IP20 terminals / IP40 when installed in an enclosure |
| Mounting type | DIN rail mounting |
| Module width | 4 modules |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.496 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits, particularly circuits supplying motors, transformers and other inductive loads.
The ABB S303P-K0.75NA has a rated operational current of 0.75 A.
Type K miniature circuit breakers are designed to tolerate high inrush currents while providing rapid protection during fault conditions, making them ideal for inductive equipment.
The ABB S303P-K0.75NA provides a high 25 kA rated short-circuit breaking capacity.
It is designed for installation on a standard DIN rail inside industrial control panels, switchboards and electrical distribution boards.
ABB S300P miniature circuit breakers are trusted by industrial engineers, panel builders and OEM manufacturers for delivering dependable overload and short-circuit protection in demanding electrical installations.
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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...