Why Choose the ABB DDA203 AC-63/0.3 Residual Current Device Block?
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.
Key Advantages
- Converts compatible ABB miniature circuit breakers into combined overcurrent and residual current protection devices.
- 63 A rated current.
- 300 mA residual operating current.
- Type AC protection for sinusoidal alternating residual currents.
- Ideal for commercial and industrial distribution systems.
- Simple DIN rail installation and ABB accessory compatibility.
Key Features
- ABB DDA203 AC-63/0.3 residual current device block.
- Product ID: 2CSB203001R3630.
- 3-pole configuration.
- 63 A rated current.
- 300 mA residual trip sensitivity.
- Type AC residual current detection.
- 230/400 V AC rated voltage.
- 50/60 Hz operation.
- DIN rail mounting.
- Compatible with ABB S200, S200M, S200P and S200L circuit breakers.
Dependable Earth Leakage Protection
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.
Typical Applications
- Commercial distribution boards.
- Industrial switchboards.
- Building services installations.
- Three-phase power distribution.
- OEM control panels.
- Fire protection through earth leakage monitoring.
