ABB S203M-K1 3-pole 1A K curve miniature circuit breaker from the System pro M compact S200M range for industrial and commercial circuit protection.
£140.05
The ABB S203M-K1 is a high-performance 3-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M series. Designed to provide dependable protection against overloads and short circuits, this circuit breaker is suitable for demanding industrial, commercial and OEM electrical installations where reliable circuit protection is essential.
Featuring a K tripping characteristic, the S203M-K1 is particularly well suited to protecting circuits with higher inrush currents, including transformers, control circuits and inductive loads. Its current limiting design helps minimise fault energy, improving equipment protection and reducing downtime.
With a 1 A rated current, 3-pole configuration and 10 kA breaking capacity in accordance with IEC/EN 60898-1, the ABB S203M-K1 delivers outstanding performance in industrial control panels, machinery and power distribution systems. It also complies with IEC/EN 60947-2, making it suitable for a wide range of professional applications.
The ABB S203M-K1 combines delayed thermal overload protection with instantaneous magnetic short circuit protection to safeguard electrical circuits and connected equipment. Its current limiting performance helps reduce the damaging effects of fault currents while improving system reliability.
Designed for professional electrical installations, the S200M range is widely specified by panel builders, machine manufacturers and electrical contractors requiring dependable protection and compatibility with ABB modular accessories.
| Current | 1 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-K1 |
| Manufacturer Part Number | 2CDS273001R0217 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 1 A |
| Number of poles | 3P |
| Tripping characteristic | K |
| Rated operational voltage | Up to 440 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA (IEC/EN 60898-1) |
| Protection rating | IP20 |
| Mounting | DIN rail |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| Mechanical endurance | 20,000 operating cycles |
| Electrical endurance | 20,000 operating cycles |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.38 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203M-K1 provides overload and short circuit protection for industrial, commercial and OEM electrical circuits.
This model has a 1 A rated current.
The K curve is designed for circuits with higher inrush currents, making it suitable for transformers, motors and inductive loads while still providing reliable protection.
The device is a 3-pole miniature circuit breaker designed for three-phase electrical systems.
The ABB S203M-K1 complies with IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077 standards.
ABB System pro M compact S200M miniature circuit breakers are trusted by panel builders, OEM manufacturers and electrical engineers for dependable protection, long service life and proven industrial performance.
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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...