ABB S203P-C40 three pole 40 A C 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-C40 is a high-performance three-pole miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide dependable overload and short-circuit protection in commercial and industrial electrical installations. Its robust construction and compact DIN rail mounted format make it suitable for distribution boards, control panels and three-phase power circuits where reliable protection is essential.
This circuit breaker features a C curve tripping characteristic, making it suitable for general-purpose circuits with moderate inrush currents. It is commonly used for power distribution, lighting circuits, small motor loads, control equipment and industrial installations where reliable thermal magnetic protection is required.
With a 40 A rated current, three-pole configuration and 15 kA short-circuit breaking capacity at 400 V AC, the S203P-C40 provides reliable protection for demanding three-phase circuits while maintaining the installation flexibility expected from ABB’s professional miniature circuit breaker range.
The ABB S203P-C40 protects electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. Its delayed thermal tripping mechanism protects against sustained overloads, while the electromechanical magnetic trip mechanism provides rapid disconnection during short-circuit faults.
The C curve characteristic allows the breaker to tolerate moderate inrush currents during equipment start-up, helping reduce nuisance tripping while maintaining reliable protection for distribution circuits, lighting, control equipment and small motor loads.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-C40 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Number of poles | 3P |
| Tripping characteristic | C |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Maximum operational voltage | 440 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 25 kA at 230 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-C40 is used to protect three-phase electrical circuits against overloads and short circuits in commercial and industrial installations.
This model has a 40 A rated current.
A C curve breaker is designed for circuits with moderate inrush currents, making it suitable for general power distribution, lighting and many small motor applications.
The S203P-C40 has a 15 kA short-circuit breaking capacity at 400 V AC and up to 25 kA at 230 V AC.
The breaker is designed for DIN rail mounting inside distribution boards, control cabinets and industrial electrical 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...