ABB S303P-K1NA industrial miniature circuit breaker with a 1 A rating, Type K tripping characteristic, 3P+N configuration and 25 kA short-circuit breaking capacity.
£249.05
The ABB 2CDS383103R0217, also known as the S303P-K1NA, is a high-performance miniature circuit breaker (MCB) developed to protect industrial electrical installations against overloads and short circuits. Part of the proven ABB S300P System pro M compact range, it combines a high breaking capacity with compact DIN rail dimensions and dependable long-term operation.
Featuring a 3P+N configuration, the S303P-K1NA protects all three phase conductors and incorporates a switched neutral pole. Its Type K tripping characteristic is designed for circuits with elevated starting currents, making the breaker particularly suitable for motors, transformers, solenoids, contactors and other inductive equipment.
With a rated current of 1 A, a rated operating voltage of up to 415 V AC and a 25 kA short-circuit breaking capacity, the ABB S303P-K1NA offers robust circuit protection for industrial control panels, switchboards, machinery and automation systems. Supply can be connected from the top or bottom, helping simplify panel design and installation.
The ABB S303P-K1NA uses a delayed thermal mechanism to protect against sustained overload conditions and an electromagnetic mechanism to disconnect the circuit rapidly during a short circuit. This dual protection helps safeguard cables, machinery and connected equipment while reducing the risk of electrical damage and unplanned downtime.
Its Type K characteristic permits higher short-duration starting currents than Type B or Type C breakers, reducing nuisance tripping when inductive equipment is energised. This makes the S303P-K1NA a suitable choice for specialised low-current motor, transformer and control circuits.
| Current | 1 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-K1NA |
| Manufacturer Part Number | 2CDS383103R0217 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 1 A |
| Tripping Characteristic | Type K |
| Pole Configuration | 3P+N |
| Protected Poles | 3 |
| Rated Operating Voltage | Up to 415 V AC |
| Frequency | 50 / 60 Hz |
| Rated Short-Circuit Breaking Capacity | 25 kA |
| Rated Insulation Voltage | 500 V |
| Impulse Withstand Voltage | 6 kV |
| Protection Rating | IP20 at terminals |
| Terminal Capacity | 0.75–35 mm² |
| Electrical Endurance | Up to 20,000 operating cycles |
| Mounting Type | DIN rail |
| Supply Connection | Top or bottom |
| Module Width | 4 modules |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| EAN | 4016779077194 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase industrial circuits against overloads and short circuits, particularly circuits supplying motors, transformers and other inductive loads.
The ABB S303P-K1NA has a rated operational current of 1 A.
A Type K characteristic allows the circuit breaker to tolerate relatively high starting currents while still providing rapid short-circuit protection, making it suitable for inductive equipment.
The ABB S303P-K1NA has a rated short-circuit breaking capacity of 25 kA.
It is mounted on a standard DIN rail inside an industrial control panel, switchboard or electrical distribution enclosure.
ABB S300P miniature circuit breakers are trusted by industrial engineers, panel builders and OEM manufacturers for dependable overload and short-circuit protection in demanding control and power distribution applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...