ABB S203P-B8 three pole 8 A miniature circuit breaker with B trip characteristic from the System pro M compact S200P range for overload and short circuit protection.
The ABB S203P-B8 is a high performance three-pole miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200P series. Designed to provide dependable protection against overloads and short circuits, it delivers reliable performance across commercial, industrial and OEM electrical installations.
Featuring a B trip characteristic and an 8 A rated current, the S203P-B8 is ideal for protecting circuits with low inrush current, including lighting circuits, distribution systems and general purpose electrical loads. Its advanced current limiting technology helps minimise fault energy, improving safety while reducing stress on connected equipment.
Manufactured to comply with major international standards including IEC/EN 60898-1, IEC/EN 60947-2, UL1077 and CSA 22.2 No.235, the ABB S203P-B8 provides a robust and reliable circuit protection solution for demanding electrical applications.
The ABB S203P-B8 combines thermal and magnetic tripping mechanisms to provide rapid and dependable protection against overload and short circuit faults. Its current limiting design helps reduce thermal and mechanical stress on electrical systems, improving both safety and equipment longevity.
Suitable for installation in control panels, switchboards and distribution boards, this miniature circuit breaker is widely used by electrical contractors, machine builders and industrial maintenance engineers requiring dependable circuit protection with long service life.
| Current | 8 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-B8 |
| Product ID | 2CDS283001R0085 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 8 A |
| Number of poles | 3 |
| Trip characteristic | B |
| Rated operational voltage | 400 V AC |
| Rated frequency | 50 / 60 Hz |
| Breaking capacity | 25 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 52.5 × 69 mm |
| Weight | Approx. 0.42 kg |
The ABB S203P-B8 protects three-phase electrical circuits against overloads and short circuits in commercial and industrial installations.
A B curve miniature circuit breaker trips at relatively low fault currents, making it ideal for lighting circuits and other loads with low inrush current.
The device has three poles for protecting three-phase circuits.
Yes. The ABB S200P range supports a variety of compatible auxiliary contacts, shunt trips, undervoltage releases and other accessories.
The S203P-B8 is designed for quick installation onto a standard DIN rail within electrical distribution boards and control panels.
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, OEMs and industrial engineers for delivering dependable circuit protection, outstanding reliability and compliance with international electrical standards.
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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...