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ABB S203-K0.5 MCB – S200 – 3P – K – 0.5A
ABB S203-K0.5 three pole 0.5 A K curve miniature circuit breaker with 6 kA breaking capacity for industrial, commercial and OEM electrical protection.
£71.10
Why Choose the ABB S203-K0.5 Miniature Circuit Breaker?
The ABB S203-K0.5 is a premium three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed to deliver dependable overload and short circuit protection, it is ideal for industrial machinery, control systems and OEM equipment requiring reliable protection for low current, high inrush applications.
Featuring a K tripping characteristic, the S203-K0.5 is specifically engineered for circuits with high starting currents while maintaining a very low rated current. This makes it particularly suitable for protecting motors, transformers, solenoids and other inductive loads where conventional B or C curve breakers may nuisance trip.
With a 0.5 A rated current, three-pole configuration and a 6 kA short circuit breaking capacity, this DIN rail mounted miniature circuit breaker offers dependable performance, straightforward installation and compliance with recognised IEC and EN standards.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial applications.
- K curve tripping characteristic for high inrush current loads.
- 0.5 A rated current for sensitive circuit protection.
- 6 kA breaking capacity for reliable fault interruption.
- Thermal and magnetic trip mechanisms provide dependable overload and short circuit protection.
- DIN rail mounting for fast installation within switchboards and control panels.
Key Features
- ABB System pro M Compact S200 series.
- Three-pole (3P) configuration.
- 0.5 A rated current.
- K tripping characteristic.
- 6 kA rated short circuit breaking capacity.
- Suitable for AC/DC applications.
- Failsafe bi-directional cylinder-lift screw terminals.
- Compatible with ABB S200 auxiliary contacts and accessories.
Reliable Circuit Protection for High Inrush Applications
The ABB S203-K0.5 combines delayed thermal overload protection with instantaneous magnetic short circuit protection to safeguard sensitive circuits while accommodating high starting currents. This makes it particularly suitable for specialised industrial applications where low current protection and high inrush tolerance are both required.
Its K characteristic is widely used for motor control circuits, transformers, magnetic devices and other inductive equipment. The compact design allows efficient installation within switchboards, machine control panels and industrial distribution systems.
Typical Applications
- Motor control circuits.
- Industrial machinery.
- Transformers and inductive loads.
- Control panels and switchgear.
- OEM automation equipment.
- Machine building applications.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 0.5 A | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-K0.5 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 0.5 A | |
| Number of poles | 3 | |
| Tripping characteristic | K | |
| Rated operational voltage | 400 V AC | |
| Maximum operational voltage | 440 V AC | |
| Input voltage type | AC/DC | |
| Rated frequency | 50 / 60 Hz | |
| Breaking capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Failsafe bi-directional cylinder-lift screw terminals | |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm | |
| Weight | approx. 0.336 kg | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-K0.5 used for?
The ABB S203-K0.5 protects three-phase electrical circuits against overloads and short circuits where low current protection and high inrush capability are required.
What does the K tripping characteristic mean?
A K curve circuit breaker is designed for inductive loads with high starting currents, making it suitable for motors, transformers and magnetic devices.
How many poles does the ABB S203-K0.5 have?
This model features a three-pole (3P) configuration for protecting three-phase electrical systems.
What is the breaking capacity of this MCB?
The ABB S203-K0.5 has a rated short circuit breaking capacity of 6 kA.
How is the ABB S203-K0.5 installed?
The circuit breaker is designed for installation onto a standard DIN rail inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted by electricians, machine builders and industrial engineers for dependable circuit protection, high quality construction and reliable long-term performance.
