ABB S203P-K2 three pole 2 A K curve miniature circuit breaker from the System pro M compact S200P range, designed for reliable overload and short-circuit protection in commercial and industrial electrical installations.
The ABB S203P-K2 is a high-performance three-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide reliable protection against overloads and short circuits in commercial and industrial electrical installations. Its compact DIN rail mounted design makes it suitable for control panels, distribution boards and automation systems where dependable circuit protection is required.
This circuit breaker features a K curve tripping characteristic, making it particularly suitable for circuits with higher inrush currents during start-up. It is commonly used with inductive loads such as motors, transformers, control equipment and machinery circuits where standard tripping curves may operate too early during normal energisation.
With a 2 A rated current, three-pole configuration and 10 kA interrupt rating at 480Y/277 V AC, the S203P-K2 provides robust protection for low-current three-phase circuits while maintaining the installation flexibility and reliability expected from ABB’s S200P miniature circuit breaker range.
The ABB S203P-K2 protects electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. Its delayed thermal tripping mechanism protects against overloads, while the electromechanical magnetic trip mechanism provides rapid disconnection during short-circuit faults.
The K curve characteristic allows the breaker to tolerate higher inrush currents during equipment start-up, helping to reduce nuisance tripping while maintaining dependable protection for motors, transformers and industrial control circuits.
| Current | 2 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K2 |
| Product ID | 2CDS283001R0277 |
| Product type | Miniature circuit breaker / supplementary protector |
| Rated current | 2 A |
| Number of poles | 3P |
| Tripping characteristic | K |
| Rated operational voltage | 480Y/277 V AC |
| Interrupt rating | 10 kA at 480 V AC |
| Trip function | Thermal magnetic |
| Standards | IEC / EN 60898-1, IEC / EN 60947-2, UL 1077, CSA 22.2 No. 235 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
The S203P-K2 is used to protect low-current three-phase electrical circuits against overloads and short circuits, particularly where inductive loads may create higher start-up currents.
This model has a 2 A rated current.
A K curve breaker is designed to tolerate higher inrush currents during start-up, making it suitable for inductive loads such as motors, transformers and control equipment.
The S203P-K2 has a 10 kA interrupt rating at 480Y/277 V AC.
The breaker is designed for DIN rail mounting inside electrical distribution boards, control cabinets and industrial panels.
ABB System pro M compact S200P miniature circuit breakers are trusted by panel builders, electrical contractors and automation engineers for dependable protection, compact installation and long-term reliability in commercial and industrial applications.
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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...