ABB DDA203 AC-40/0.03 residual current device block with 40 A rated current, 30 mA Type AC sensitivity and compatibility with ABB S200 series miniature circuit breakers.
£176.91
The ABB DDA203 AC-40/0.03 (Product ID: 2CSB203001R1400) is a high-quality 3-pole Residual Current Device (RCD) block from ABB's trusted DDA200 series. Designed for use with compatible ABB S200 series miniature circuit breakers, it converts a standard MCB into an RCBO-style solution by providing reliable residual current protection against earth leakage faults. It is rated at 40 A with a 30 mA residual operating current for additional protection against electric shock.
This Type AC RCD block detects sinusoidal alternating earth fault currents, making it suitable for conventional AC circuits in residential, commercial and light industrial installations. When combined with an ABB S200 series MCB, it provides both overcurrent and earth leakage protection within a compact DIN rail assembly.
Manufactured to ABB's exacting quality standards, the DDA203 AC-40/0.03 complies with IEC/EN 61009 Annex G and is designed for straightforward installation alongside compatible S200, S200M and S300P circuit breakers.
The ABB DDA203 AC-40/0.03 continuously monitors the current flowing through all conductors. Should an earth leakage current reach 30 mA, the device rapidly disconnects the circuit, helping protect people from electric shock and reducing the risk of fire caused by insulation faults. When paired with an ABB S200 series MCB, it provides a comprehensive protection solution in a compact assembly.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | DDA200 |
| Model | DDA203 AC-40/0.03 |
| Product ID | 2CSB203001R1400 |
| Product type | Residual Current Device (RCD) Block |
| EAN | 8012542795803 |
| Number of poles | 3 |
| Rated current (In) | 40 A |
| Rated residual operating current (IΔn) | 30 mA |
| Residual current type | Type AC |
| Operating characteristic | Instantaneous |
| Rated operational voltage | 230/400 V AC |
| Rated insulation voltage | 500 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50/60 Hz |
| Mounting | DIN rail |
| Protection rating | IP20 |
| Dimensions (W × H × D) | 87 × 93 × 69 mm |
| Weight | Approx. 0.158 kg |
| Standards | IEC/EN 61009 Annex G |
| HS Code | 85363030 |
| Country of Manufacture | Italy |
It is a 3-pole residual current device block that adds earth leakage protection to compatible ABB S200 series miniature circuit breakers.
Type AC RCDs detect sinusoidal alternating residual currents and are intended for standard AC circuits without pulsating DC leakage currents.
The DDA203 AC-40/0.03 has a rated residual operating current of 30 mA, providing additional protection against electric shock.
It is designed for use with ABB S200, S200M and S300P series miniature circuit breakers.
It complies with IEC/EN 61009 Annex G for residual current device blocks.
ABB DDA200 residual current device blocks provide dependable earth leakage protection when combined with compatible ABB miniature circuit breakers, delivering reliable safety for residential, commercial and industrial electrical installations.
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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...