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2CDS383001R0277 ABB S303P-K2 Miniature Circuit Breaker – 3P – K – 2 A
ABB S303P-K2 three-pole miniature circuit breaker with a 2 A rated current, K curve tripping characteristic and 25 kA breaking capacity for industrial motor and inductive load protection.
£112.15
Why Choose the ABB S303P-K2 Miniature Circuit Breaker?
The ABB S303P-K2 is a premium three-pole miniature circuit breaker (MCB) engineered to provide reliable protection against overloads and short circuits in industrial, commercial and OEM electrical installations. As part of the proven ABB System pro M compact S300P series, it delivers dependable circuit protection, exceptional fault interruption capability and long service life in demanding applications.
Designed in accordance with international IEC, UL and CSA standards, the S303P-K2 features a compact DIN rail mounted design that enables fast installation inside switchboards, control panels and distribution boards. Its robust switching mechanism, secure screw terminals and high mechanical endurance make it ideal for continuous industrial operation.
Featuring a 2 A rated current, a K curve tripping characteristic and a 25 kA breaking capacity, this miniature circuit breaker is particularly suited to protecting transformers, control circuits, motors and inductive loads where higher inrush currents require a specialised tripping characteristic.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial applications.
- 2 A rated current for low-current protection.
- K curve tripping characteristic ideal for inductive loads and motor circuits.
- 25 kA breaking capacity for excellent fault protection.
- Manufactured to IEC, UL and CSA standards.
- Quick installation on standard 35 mm DIN rail.
Key Features
- ABB System pro M compact S300P series.
- 2 A rated current.
- Three protected poles.
- K curve tripping characteristic.
- 415 V AC rated operational voltage.
- 25 kA rated short-circuit breaking capacity (Icn).
- IP20 protection rating.
- 35 mm DIN rail mounting.
Optimised Protection for Motors and Inductive Loads
The ABB S303P-K2 automatically disconnects electrical circuits when overload or short-circuit conditions occur, protecting wiring and connected equipment from damage. The K curve characteristic is specifically designed for circuits with higher inrush currents, making it particularly suitable for motors, transformers, solenoids and other inductive loads.
As part of ABB's S300P range, the S303P-K2 combines high fault interruption capability with reliable long-term performance, making it a preferred choice for panel builders, machine manufacturers and industrial electrical contractors.
Typical Applications
- Industrial motor protection.
- Transformer protection.
- Industrial control panels.
- Machine building and OEM equipment.
- Automation systems.
- Commercial and industrial electrical distribution.
Technical Specifications
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| Breaking Capacity | 25 kA | |
|---|---|---|
| Current | 2 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Manufacturer | ABB | |
| Series | System pro M compact S300P | |
| Model | S303P-K2 | |
| SKU | 2CDS383001R0277 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 2 A | |
| Tripping characteristic | K Curve | |
| Number of poles | 3 | |
| Rated operational voltage | 415 V AC | |
| Maximum operating voltage | 480Y/277 V AC, 125 V DC | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity (Icn) | 25 kA | |
| Ultimate breaking capacity (Icu) | 100 kA at 415 V AC | |
| Rated insulation voltage | 500 V | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| Weight | 372 g | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S303P-K2 used for?
It protects three-phase electrical circuits against overloads and short circuits, particularly where motors, transformers and other inductive loads create higher inrush currents.
What is the rated current of this circuit breaker?
The ABB S303P-K2 has a 2 A rated current.
What does the K curve tripping characteristic mean?
The K curve is designed for inductive loads and motor circuits, allowing higher starting currents while still providing rapid fault protection.
What is the breaking capacity?
The S303P-K2 offers a 25 kA rated short-circuit breaking capacity (Icn) with an ultimate breaking capacity of up to 100 kA (Icu) at 415 V AC.
How is the ABB S303P-K2 installed?
The breaker is designed for mounting onto a standard 35 mm DIN rail inside electrical distribution boards, switchboards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted worldwide by electricians, machine builders and panel manufacturers for delivering dependable circuit protection, high fault performance and long operational life.
