ABB S203P-B50 three-pole 50 A miniature circuit breaker with B tripping characteristic for commercial and industrial electrical circuit protection.
The ABB S203P-B50 is a high performance three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200P series. Designed for dependable overload and short circuit protection, it is ideal for commercial distribution boards, industrial control panels, OEM machinery and electrical systems requiring reliable circuit protection.
Featuring a B tripping characteristic, the S203P-B50 is suited to circuits with low inrush currents, including resistive loads, lighting circuits and general distribution applications. Its delayed thermal trip mechanism provides overload protection, while its electromechanical trip mechanism delivers rapid disconnection during short circuit conditions.
With a 50 A rated current, three-pole configuration and breaking capacity of up to 25 kA at 230 / 400 V AC, the ABB S203P-B50 provides robust circuit protection for demanding commercial and industrial installations. Its compact DIN rail mounted design enables straightforward installation inside electrical enclosures, switchboards and control panels.
Miniature circuit breakers such as the ABB S203P-B50 protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. This helps protect cables, connected equipment and control systems from damage caused by excessive current.
The B curve characteristic is designed for circuits with low inrush currents, making this breaker suitable for resistive loads, lighting circuits and general electrical distribution. Its compact design, high breaking performance and ABB accessory compatibility make it a practical choice for electrical contractors, panel builders and maintenance engineers.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-B50 |
| Product ID | 2CDS283001R0505 |
| EAN | 4016779589857 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 50 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | B |
| Rated operational voltage | 480Y / 277 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA at 230 / 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-B50 is used to protect three-phase electrical circuits against overloads and short circuits in commercial and industrial installations.
The B curve is designed for circuits with low inrush currents, making it suitable for resistive loads, lighting circuits and general distribution applications.
The ABB S203P-B50 has a 50 A rated current.
The S203P-B50 is a three-pole miniature circuit breaker.
The breaker 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 electrical contractors, panel builders, OEM manufacturers and industrial engineers worldwide for dependable circuit protection, high breaking performance and long service life.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...