ABB S203P-D50 three-pole 50 A miniature circuit breaker with D tripping characteristic for industrial and commercial electrical circuit protection.
The ABB S203P-D50 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 electrical systems requiring robust circuit protection.
Featuring a D tripping characteristic, the S203P-D50 is particularly suited to circuits with high inrush currents, including motors, transformers, compressors, solenoids and other demanding inductive loads. Its delayed thermal trip mechanism protects against overloads, while its electromechanical trip mechanism provides 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-D50 delivers dependable protection for demanding industrial and commercial installations. Its compact DIN rail mounted format allows straightforward installation within electrical enclosures, switchboards and control panels.
Miniature circuit breakers such as the ABB S203P-D50 protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. This helps protect cables, equipment and control systems from excessive current and potential damage.
The D curve characteristic provides delayed magnetic tripping for circuits with high start-up currents, making this breaker suitable for motors, transformers, compressors and other inductive loads. Its compact design, high breaking performance and ABB accessory compatibility make it a practical choice for panel builders, OEM machine builders and electrical engineers.
| Current | 50 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-D50 |
| Product ID | 2CDS283001R0501 |
| EAN | 4016779591683 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 50 A |
| Number of poles | 3 |
| Number of protected poles | 3 |
| Tripping characteristic | D |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA at 230 / 400 V AC |
| Rated short-circuit breaking capacity | 15 kA at 400 V AC |
| Impulse withstand voltage | 4 kV |
| Current limiting class | 3 |
| 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-D50 is used to protect three-phase electrical circuits against overloads and short circuits, especially where high inrush currents are present.
The D curve is designed for circuits with high inrush currents, making it suitable for motors, transformers, compressors and similar inductive equipment.
The ABB S203P-D50 has a 50 A rated current.
The S203P-D50 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 panel builders, OEM manufacturers and electrical engineers worldwide for dependable circuit protection, high breaking performance 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...