ABB S203M-D1NA 3+NP 1 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-D1NA is a high quality 3+NP miniature circuit breaker (MCB) designed for reliable overload and short circuit protection in residential, commercial and industrial electrical installations. As part of the proven ABB System pro M compact S200M series, it provides dependable circuit protection in a compact DIN rail mounted format.
This 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 suitable for circuits with high inrush currents, making it ideal for transformers, motors, solenoids and other inductive loads.
With a 1 A rated current, 3+NP configuration and 10 kA short circuit capacity, the ABB S203M-D1NA provides robust protection for three-phase and neutral circuits. The switched neutral design supports safe isolation and reliable operation within control panels, distribution boards and automation systems.
ABB System pro M compact S200M miniature circuit breakers are current limiting devices designed to protect electrical circuits from overload and short circuit conditions. They are widely used across residential, commercial and industrial applications where reliable low voltage protection is required.
The D curve characteristic of the S203M-D1NA provides a higher instantaneous trip threshold than B or C curve devices, making it suitable for circuits where short duration start-up currents are expected. This helps reduce nuisance tripping whilst maintaining effective protection under fault conditions.
| Current | 1 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | S200M |
| Model | S203M-D1NA |
| Product type | Miniature circuit breaker (MCB) |
| Product ID | 2CDS273103R0011 |
| EAN | 4016779663328 |
| Rated current | 1 A |
| Number of poles | 3+NP |
| Tripping characteristic | D |
| Rated short circuit capacity | 10 kA |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
| Typical applications | Distribution boards, control panels, automation systems and inductive load circuits |
The S203M-D1NA is used to protect low current three-phase and neutral electrical circuits against overloads and short circuits.
The ABB S203M-D1NA has a 1 A rated current.
The D curve is designed for circuits with high inrush currents, making it suitable for inductive loads such as motors, transformers and solenoids.
This model has a 3+NP configuration, providing protection for three phases with a switched neutral pole.
It is typically installed on a DIN rail inside distribution boards, control panels and industrial electrical enclosures.
ABB S200M miniature circuit breakers are trusted by electricians, panel builders and industrial engineers for dependable protection, compact installation and long-term reliability in low voltage electrical systems.
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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...