ABB DDA203 AC-63/0.3 residual current device block with 63 A rated current, 300 mA Type AC sensitivity and compatibility with ABB S200 series miniature circuit breakers.
£165.25
The ABB DDA203 AC-63/0.3 (Product ID: 2CSB203001R3630) is a premium 3-pole Residual Current Device (RCD) block from ABB's proven DDA200 range. Designed for use with compatible ABB S200, S200M, S200P and S200L miniature circuit breakers, it adds dependable residual current protection to create a compact RCBO-style solution for commercial and industrial electrical installations.
With a 63 A rated current, a 300 mA residual operating current (IΔn) and Type AC sensitivity, the DDA203 AC-63/0.3 is intended primarily for protection against earth leakage faults and reducing the risk of fire caused by insulation failures. It detects sinusoidal alternating residual currents and operates instantaneously when the specified leakage current is exceeded.
Engineered for straightforward DIN rail installation, the device complies with IEC/EN 61009 Annex G and integrates seamlessly with ABB's System pro M compact range, providing a flexible and reliable solution for modern distribution boards and switchgear assemblies.
The ABB DDA203 AC-63/0.3 continuously monitors the current flowing through all conductors. When a residual current of 300 mA is detected, the device rapidly disconnects the circuit, helping protect electrical installations against insulation faults and reducing the risk of fire. When coupled with a compatible ABB miniature circuit breaker, it provides a comprehensive overcurrent and residual current protection solution.
| Current | 63 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | DDA200 |
| Model | DDA203 AC-63/0.3 |
| Product ID | 2CSB203001R3630 |
| EAN | 8012542796046 |
| Product type | Residual Current Device (RCD) Block |
| Number of poles | 3 |
| Rated current (In) | 63 A |
| Rated residual operating current (IΔn) | 300 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) | 122 × 93 × 76 mm |
| Weight | Approx. 318 g |
| 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.
A 300 mA residual operating current is typically used to provide protection against fire risks caused by earth leakage faults rather than additional personal protection.
Type AC devices detect sinusoidal alternating residual currents and are intended for standard AC electrical circuits.
The DDA203 AC-63/0.3 is compatible with ABB S200L, S200, S200M and S200P miniature circuit breaker ranges.
It complies with IEC/EN 61009 Annex G.
ABB DDA200 residual current device blocks are trusted worldwide for delivering reliable earth leakage protection and seamless integration with ABB miniature circuit breakers in 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...
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...