ABB S203M-D3NA 3+NP 3 A miniature circuit breaker with D characteristic tripping curve and 10 kA short circuit capacity for residential, commercial and industrial circuit protection.
£273.43
The ABB S203M-D3NA is a premium 3+NP miniature circuit breaker (MCB) engineered to provide reliable overload and short circuit protection for residential, commercial and industrial electrical installations. As part of the trusted ABB System pro M compact S200M series, it delivers dependable low voltage circuit protection with a compact DIN rail mounted design.
The circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromechanical tripping mechanism for short circuit protection. Its D characteristic tripping curve is specifically designed for circuits with high inrush currents, making it ideal for motors, transformers, solenoids and other inductive electrical loads.
With a 3 A rated current, 3+NP configuration and 10 kA rated short circuit capacity, the ABB S203M-D3NA provides dependable protection for three-phase and neutral circuits. The switched neutral pole enables safe isolation whilst maintaining compact installation inside distribution boards and control panels.
ABB System pro M compact S200M miniature circuit breakers are current limiting protective devices designed to safeguard electrical circuits against overload and short circuit conditions. They comply with both IEC/EN 60898-1 and IEC/EN 60947-2, making them suitable for residential, commercial and industrial applications.
The D curve characteristic of the S203M-D3NA provides a higher magnetic trip threshold than B or C curve devices, allowing temporary starting currents to pass without nuisance tripping whilst maintaining rapid protection during genuine fault conditions.
| Current | 3 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-D3NA |
| Product ID | 2CDS273103R0031 |
| EAN | 4016779663359 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 3 A |
| Number of poles | 3+NP |
| Number of protected poles | 3 |
| Tripping characteristic | D |
| Rated short circuit capacity | 10 kA |
| Rated ultimate short circuit capacity | 25 kA at 230 V AC / 15 kA at 440 V AC |
| Rated service short circuit capacity | 7.5 kA |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Current limiting class | Class 3 |
The S203M-D3NA protects three-phase and neutral electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
The ABB S203M-D3NA has a 3 A rated current.
The D curve is designed for circuits with high inrush currents, making it suitable for motors, transformers and other inductive loads.
This model features a 3+NP configuration, providing protection for three phases together with a switched neutral.
It is designed for DIN rail mounting inside distribution boards, switchboards and industrial control panels.
ABB System pro M compact miniature circuit breakers are trusted worldwide by electricians, panel builders and industrial engineers for dependable protection, compact installation 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...