ABB S203-K5 miniature circuit breaker, a 3-pole 5 A K curve MCB from the System pro M compact S200 range with 6 kA breaking capacity for residential, commercial and industrial circuit protection.
£139.22
The ABB S203-K5 is a compact and reliable 3-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. Part of the ABB System pro M compact S200 range, it provides dependable modular protection for residential, commercial and industrial installations.
With a K tripping characteristic, the S203-K5 is suited to circuits with higher inrush currents, helping reduce nuisance tripping while maintaining effective protection. This makes it suitable for selected inductive loads, transformers, motor circuits and industrial control applications.
Rated at 5 A with a 3-pole configuration and 6 kA short-circuit breaking capacity, the ABB S203-K5 provides effective protection for three-phase low-current circuits. Its DIN rail mounting design allows fast installation in distribution boards, control panels and machine cabinets.
Miniature circuit breakers such as the ABB S203-K5 automatically disconnect the circuit when excessive current is detected. The delayed thermal trip mechanism provides overload protection, while the electromechanical trip mechanism reacts quickly to short-circuit faults.
The K curve characteristic is designed for applications where temporary inrush currents may occur during normal operation. This makes the S203-K5 a practical choice for selected transformers, inductive loads, motor circuits and automation equipment.
| Current | 5 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | S200 |
| Model | S203-K5 |
| Product ID | 2CDS253001R0357 |
| EAN | 4016779645195 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Protected poles | 3 |
| Rated current | 5 A |
| Tripping characteristic | K curve |
| Rated short-circuit capacity | 6 kA |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.38 kg |
The ABB S203-K5 is used to protect three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
The S203-K5 has a rated current of 5 A.
This miniature circuit breaker has a 3-pole configuration with three protected poles.
The K curve tripping characteristic is designed for circuits with higher inrush currents, making it suitable for selected inductive loads, transformers and control circuits.
It is typically installed on a DIN rail inside distribution boards, control panels, machine cabinets or industrial electrical enclosures.
ABB System pro M compact S200 miniature circuit breakers are trusted by electrical contractors, panel builders and engineers for reliable modular circuit protection across residential, commercial and industrial installations.
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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...