ABB S203P-K20 three-pole 20 A miniature circuit breaker with K tripping characteristic for industrial and commercial electrical circuit protection.
The ABB S203P-K20 is a high performance three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200P series. Designed for reliable overload and short circuit protection, it is ideal for industrial control panels, commercial distribution boards, machinery and automation applications requiring dependable circuit protection.
Featuring a K tripping characteristic, the S203P-K20 is particularly suited to circuits with moderate inrush currents, including motors, transformers and inductive loads. Its delayed thermal trip mechanism protects against overloads, while its electromechanical trip mechanism provides rapid disconnection during short circuit conditions.
With a 20 A rated current, three-pole configuration and compact DIN rail mounted design, the ABB S203P-K20 delivers reliable protection for demanding industrial and commercial installations. Its current limiting construction helps reduce fault energy, supporting safer operation and long-term equipment reliability.
Miniature circuit breakers such as the ABB S203P-K20 protect electrical circuits by automatically disconnecting the supply when overload or short circuit conditions occur. This helps protect cables, connected equipment and control systems from excessive current and potential damage.
The K curve characteristic makes this breaker well suited to inductive loads where starting currents are higher than normal running current. Its compact construction, high quality design and compatibility with ABB modular accessories make it a practical choice for panel builders, OEM machine builders and industrial electrical engineers.
| Current | 20 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K20 |
| Product ID | 2CDS283001R0487 |
| EAN | 4016779592758 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 20 A |
| Number of poles | 3 |
| Tripping characteristic | K |
| Rated operational voltage | 480Y / 277 V AC |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA at 400 V AC |
| Terminal type | Screw terminals |
| Mounting type | DIN rail |
| Protection rating | IP20 terminals, IP40 when installed in an enclosure |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| Weight | approx. 0.42 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235 |
The S203P-K20 is used to protect three-phase electrical circuits against overloads and short circuits in industrial, commercial and automation applications.
The K curve is designed for circuits with moderate inrush currents, making it suitable for motors, transformers and other inductive loads.
The ABB S203P-K20 has a 20 A rated current.
This miniature circuit breaker has a three-pole configuration.
The S203P-K20 is designed for DIN rail mounting inside electrical control panels, switchboards and distribution boards.
ABB System pro M compact miniature circuit breakers are trusted by panel builders, OEM manufacturers and electrical engineers worldwide for reliable circuit protection, high quality construction 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...