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2CDS383103R0277 ABB S303P-K2NA Miniature Circuit Breaker – 3+NP – K – 2 A
ABB S303P-K2NA miniature circuit breaker with a 2 A rating, Type K tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£136.98
Why Choose the ABB 2CDS383103R0277 S303P-K2NA Miniature Circuit Breaker?
The ABB 2CDS383103R0277, also known as the S303P-K2NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in demanding industrial electrical installations. As part of the trusted ABB S300P System pro M compact range, it combines exceptional fault-clearing performance, compact dimensions and long-term reliability for industrial power distribution systems.
Featuring a 3P+N configuration, the S303P-K2NA 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, contactors, solenoids and other inductive industrial loads where nuisance tripping must be minimised.
With a rated current of 2 A, a rated operating voltage of 415 V AC, a 25 kA rated short-circuit breaking capacity (Icn) and a 100 kA ultimate breaking capacity (Icu), the ABB S303P-K2NA delivers dependable protection for industrial control panels, OEM machinery, automation systems and electrical distribution boards.
Key Advantages
- Premium ABB miniature circuit breaker for industrial electrical protection.
- 2 A rated current with Type K tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- 25 kA rated short-circuit breaking capacity.
- Designed for circuits with high motor and transformer starting currents.
- Compact DIN rail mounting for industrial switchboards and control panels.
Key Features
- ABB S300P System pro M compact series.
- 2 A rated operational current.
- Type K tripping characteristic.
- Three protected poles with switched neutral.
- 25 kA rated service short-circuit breaking capacity (Icn).
- 100 kA ultimate short-circuit breaking capacity (Icu).
- Suitable for AC and DC applications.
- Top or bottom supply connection.
- Contact position indication (Red ON / Green OFF).
- DIN rail mounting.
Reliable Protection for High Inrush Industrial Loads
The ABB S303P-K2NA combines thermal overload protection with instantaneous magnetic short-circuit protection to safeguard industrial machinery, cabling and electrical distribution systems. This dual protection improves operational safety while helping minimise costly downtime and equipment damage.
Its Type K characteristic is specifically intended for applications where motors, transformers and magnetic devices produce high transient starting currents, allowing normal equipment start-up while still delivering rapid fault disconnection during genuine short-circuit conditions.
Typical Applications
- Industrial motor control circuits.
- Transformer protection.
- Automation and PLC panels.
- Machine control systems.
- OEM machinery.
- Industrial electrical distribution boards.
Technical Specifications
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| Breaking Capacity | 25 kA | |
|---|---|---|
| Current | 2 A | |
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Manufacturer | ABB | |
| Series | S300P System pro M compact | |
| Model | S303P-K2NA | |
| Manufacturer Part Number | 2CDS383103R0277 | |
| Product Type | Miniature Circuit Breaker (MCB) | |
| Rated Current | 2 A | |
| Tripping Characteristic | Type K | |
| Pole Configuration | 3P+N | |
| Protected Poles | 3 | |
| Rated Voltage | Up to 415 V AC | |
| Maximum Operating Voltage | 480Y/277 V AC, 125 V DC | |
| Voltage Type | AC/DC | |
| Frequency | 50 / 60 Hz | |
| Rated Short-Circuit Breaking Capacity (Icn) | 25 kA | |
| Ultimate Breaking Capacity (Icu) | 100 kA | |
| Rated Insulation Voltage (Ui) | 500 V | |
| Impulse Withstand Voltage (Uimp) | 6 kV | |
| Protection Rating | IP20 | |
| Terminal Capacity | 0.75–35 mm² rigid, 0.75–25 mm² flexible | |
| Mounting | DIN Rail | |
| Operating Temperature | -40°C to +70°C | |
| Electrical Endurance | 20,000 operating cycles | |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm | |
| Weight | Approx. 0.496 kg | |
| EAN | 4016779077125 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB 2CDS383103R0277 used for?
It protects three-phase industrial electrical circuits against overloads and short circuits, particularly those supplying motors, transformers and other inductive equipment.
What is the rated current of the S303P-K2NA?
The ABB S303P-K2NA has a rated operational current of 2 A.
What does the Type K tripping characteristic provide?
Type K circuit breakers tolerate higher inrush currents than conventional breakers while still providing rapid protection during genuine fault conditions.
What is the breaking capacity of the S303P-K2NA?
The breaker provides a rated short-circuit breaking capacity of 25 kA and an ultimate breaking capacity of 100 kA.
How is the ABB S303P-K2NA installed?
It is designed for installation on a standard DIN rail inside industrial control panels, switchboards and electrical distribution boards.
Trusted by Electrical Professionals Worldwide
ABB S300P miniature circuit breakers are trusted by industrial engineers, panel builders and OEM manufacturers worldwide for delivering dependable overload and short-circuit protection in demanding electrical installations.
