ABB S203P-K0.5 three-pole 0.5 A K curve miniature circuit breaker from the System pro M compact S200P range for overload and short circuit protection.
The ABB S203P-K0.5 is a precision three-pole miniature circuit breaker (MCB) designed to provide dependable overload and short circuit protection for low current electrical circuits. As part of the trusted ABB System pro M compact S200P series, it delivers reliable protection for commercial, industrial and OEM applications requiring accurate low current circuit protection.
Featuring a K trip characteristic, the S203P-K0.5 is ideally suited to inductive loads, control circuits, instrumentation and automation equipment where higher magnetic trip thresholds are required. Its advanced current limiting design helps minimise fault energy, improving installation safety and reducing stress on connected equipment.
With a rated current of 0.5 A, a three-pole configuration and a 25 kA breaking capacity, the ABB S203P-K0.5 offers dependable protection for demanding low current three-phase installations while complying with recognised international standards.
The ABB S203P-K0.5 combines thermal overload protection with magnetic short circuit protection to safeguard sensitive low current circuits from damaging electrical faults. Its current limiting technology helps reduce thermal and mechanical stress during fault conditions, improving the reliability of connected equipment.
Designed for professional electrical installations, the S200P range is widely used by panel builders, automation engineers and machine manufacturers requiring dependable circuit protection that complies with international standards.
| Current | 0.5 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K0.5 |
| Product ID | 2CDS283001R0157 |
| EAN | 4016779592635 |
| Product type | Miniature circuit breaker |
| Rated current | 0.5 A |
| Number of poles | 3 |
| Trip characteristic | K curve |
| Rated operational voltage | 400 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Breaking capacity (Icu) | 25 kA |
| Service breaking capacity (Ics) | 12.5 kA |
| Protection rating | IP20 (IP40 when installed in an enclosure) |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.42 kg |
The ABB S203P-K0.5 protects low current three-phase electrical circuits against overloads and short circuits in industrial control, automation and instrumentation applications.
The breaker has a rated current of 0.5 A.
A K curve miniature circuit breaker is designed for inductive and control applications where higher magnetic tripping levels are required while maintaining dependable overload protection.
The ABB S203P-K0.5 is a three-pole miniature circuit breaker designed for protecting three-phase circuits.
The S203P-K0.5 mounts directly onto a standard DIN rail inside switchboards, distribution boards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and automation engineers for delivering dependable circuit protection, excellent reliability and long service life.
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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...