ABB S203M-D1.6NA miniature circuit breaker, a 1.6 A 3P+N D curve MCB from the System pro M Compact S200M series for industrial, commercial and specialist circuit protection.
£273.43
The ABB S203M-D1.6NA is a compact and reliable miniature circuit breaker (MCB) from the ABB System pro M Compact S200M series, designed to provide dependable overload and short circuit protection for industrial, commercial and specialist electrical installations. Featuring a D characteristic trip curve, it is suited to circuits where higher starting currents may occur.
This MCB uses a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short circuit protection. The S200M range is current limiting, helping reduce fault energy and improve protection for downstream electrical equipment.
With a rated current of 1.6 A, a 3P+N configuration and a 10 kA breaking capacity, the S203M-D1.6NA is ideal for protecting low-current three-phase control circuits, automation equipment and specialist electrical loads requiring neutral switching.
Miniature circuit breakers such as the ABB S203M-D1.6NA protect electrical circuits by disconnecting the supply when overloads or short circuits occur. The thermal trip responds to sustained overload conditions, while the electromechanical trip reacts quickly to short circuit faults.
The D curve characteristic is designed for circuits with higher inrush currents, making this device suitable for selected control circuits, inductive loads and specialist equipment where nuisance tripping must be reduced without compromising protection.
| Current | 1.6 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200M |
| Model | S203M-D1.6NA |
| Product ID | 2CDS273103R0971 |
| EAN | 4016779663335 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 1.6 A |
| Number of protected poles | 3 |
| Neutral pole | Switched neutral |
| Pole configuration | 3P+N |
| Trip characteristic | D |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
It is used to provide overload and short circuit protection for low-current three-phase circuits where neutral switching is required.
The D curve is designed for circuits with higher inrush currents, such as selected motor, transformer and inductive load applications.
The ABB S203M-D1.6NA has a rated current of 1.6 A.
3P+N means the device has three protected phase poles together with a switched neutral pole.
It is designed for DIN rail mounting inside electrical distribution boards, control panels and industrial enclosures.
ABB System pro M Compact miniature circuit breakers are widely used by panel builders, electrical contractors and machine manufacturers for dependable circuit protection across industrial, commercial and specialist 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...