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ABB S203-K0.5NA MCB – S200 – 3P+N – K – 0.5A
ABB S203-K0.5NA three-pole plus switched neutral miniature circuit breaker with 0.5 A rated current, K curve tripping characteristic and 6 kA breaking capacity for industrial electrical installations.
£110.41
Why Choose the ABB S203-K0.5NA Miniature Circuit Breaker?
The ABB S203-K0.5NA is a premium three-pole plus switched neutral (3P+N) miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series. Designed to provide dependable overload and short circuit protection, it is ideal for industrial control panels, OEM machinery and specialist electrical installations requiring reliable protection of three-phase circuits with a switched neutral.
Featuring a K curve tripping characteristic and a 0.5 A rated current, the S203-K0.5NA is specifically designed for protecting motors, transformers and control circuits with high inrush currents whilst maintaining excellent protection against overloads and short circuits. Its advanced current limiting technology helps reduce fault energy and protect valuable equipment.
Manufactured to ABB's exacting quality standards, the S203-K0.5NA offers excellent mechanical durability, reliable switching performance and compatibility with ABB's comprehensive range of System pro M Compact accessories, making it an ideal choice for demanding industrial applications.
Key Advantages
- Reliable 3P+N miniature circuit breaker for industrial applications.
- 0.5 A rated current with K curve tripping characteristic.
- 6 kA breaking capacity for dependable fault protection.
- Protects against overloads and short circuits.
- Switched neutral provides additional installation flexibility.
- Compatible with ABB auxiliary contacts and signalling accessories.
Key Features
- ABB System pro M Compact S200 series.
- 0.5 A rated current.
- K characteristic trip curve.
- Three protected poles plus switched neutral (3P+N).
- 6 kA rated short circuit breaking capacity.
- DIN rail mounting.
- Thermal overload and magnetic short circuit protection.
- Failsafe bi-directional cylinder-lift terminals.
Reliable Protection for Three-Phase Electrical Systems
The ABB S203-K0.5NA combines thermal overload protection with rapid magnetic short circuit protection to safeguard electrical installations. Its K curve characteristic is designed for circuits with high starting currents, making it ideal for motors, transformers and industrial control equipment.
The integrated switched neutral enables simultaneous switching of the neutral conductor alongside the three live phases, making this breaker suitable for industrial distribution systems, control panels and OEM machinery.
Typical Applications
- Industrial control panels.
- Motor protection circuits.
- Transformer circuits.
- OEM machinery.
- Industrial automation systems.
- Three-phase distribution systems with switched neutral.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Current | 0.5 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | K curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200 | |
| Model | S203-K0.5NA | |
| Product ID | 2CDS253103R0157 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 0.5 A | |
| Tripping characteristic | K Curve | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Maximum operating voltage | 440 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short circuit breaking capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 70 × 69 mm | |
| Weight | Approx. 0.50 kg | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-K0.5NA used for?
The ABB S203-K0.5NA protects three-phase electrical circuits with a switched neutral against overloads and short circuits, particularly where high inrush currents occur.
What does the K curve characteristic mean?
A K curve miniature circuit breaker is designed for circuits with high starting currents, making it ideal for motors, transformers and industrial control equipment.
What is the rated current of this circuit breaker?
The ABB S203-K0.5NA has a 0.5 A rated current.
What does 3P+N mean?
3P+N indicates three protected phase poles together with an additional switched neutral pole, allowing all conductors to be switched simultaneously.
How is the ABB S203-K0.5NA installed?
The breaker is designed for standard DIN rail mounting inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for dependable circuit protection, long service life and reliable performance.
