ABB S203P-D40NA System pro M compact S200P miniature circuit breaker with 3P+N configuration, 40 A rated current, D tripping characteristic and high breaking capacity for industrial and commercial circuit protection.
The ABB S203P-D40NA is a high-performance 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200P series. Designed for dependable overload and short circuit protection, it provides reliable protection for industrial machinery, motor control panels, commercial switchboards and OEM electrical installations.
This miniature circuit breaker features a D tripping characteristic and a 40 A rated current, making it suitable for circuits with high inrush currents. It is particularly useful for motors, transformers, compressors and inductive loads where robust fault protection is required without unnecessary nuisance tripping during normal start-up.
With a 3P+N configuration and high breaking capacity performance, the S203P-D40NA delivers professional-grade protection for demanding three-phase electrical systems. Its compact DIN rail mounted design allows efficient installation inside distribution boards, control cabinets and machine panels.
Miniature circuit breakers such as the ABB S203P-D40NA protect electrical installations by automatically disconnecting the circuit during overload or short circuit conditions. The delayed thermal trip mechanism responds to overloads, while the electromagnetic trip mechanism provides rapid disconnection during short circuit faults.
The D curve characteristic is designed for loads that draw high starting currents, making the S203P-D40NA suitable for motors, transformers, compressors and other inductive equipment. This helps maintain reliable operation while still providing strong protection against damaging fault conditions.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-D40NA |
| Product type | Miniature Circuit Breaker (MCB) |
| Product ID | 2CDS283103R0401 |
| EAN | 4016779592185 |
| Rated current | 40 A |
| Tripping characteristic | D |
| Number of poles | 3P+N |
| Total poles | 4 |
| Rated voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Breaking capacity | Up to 25 kA at 230/400 V AC |
| Current limiting class | 3 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
The S203P-D40NA is used to protect three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.
This miniature circuit breaker has a 40 A rated current.
A D curve MCB is designed for circuits with high inrush currents, making it suitable for motors, transformers, compressors and other inductive loads.
The S203P-D40NA is a 3P+N device with three protected poles and a switched neutral.
Yes. The S203P-D40NA is designed for standard DIN rail mounting inside electrical panels, distribution boards and machine control cabinets.
ABB System pro M compact miniature circuit breakers are widely used by panel builders, electrical contractors and industrial engineers for dependable circuit protection, high fault performance and long-term reliability in demanding electrical installations.
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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...