2CSB202001R4250 ABB DDA202 AC-25/0.5 RCD Block 2P Type AC 500mA 25A

Why Choose the ABB DDA202 AC-25/0.5 RCD Block?

The ABB DDA202 AC-25/0.5 is a 2-pole residual current device (RCD) block from the ABB DDA200 series, designed to add residual-current protection when combined with a compatible ABB miniature circuit breaker. Rated at 25 A with a 500 mA rated residual operating current, it provides earth-leakage protection for suitable low-voltage electrical circuits and distribution systems.

As a Type AC residual-current block, the DDA202 AC-25/0.5 is designed to respond to sinusoidal alternating residual currents. The DDA200 modular system enables the residual-current block to be coupled with a compatible ABB MCB, combining residual-current detection with the overload and short-circuit protection provided by the associated circuit breaker.

The 2-pole configuration, 25 A current rating and 500 mA residual-current threshold make this model suitable for appropriate commercial and industrial distribution applications. Its modular construction supports integration into ABB System pro M compact installations where coordinated earth-leakage and overcurrent protection is required.

Key Advantages

• 25 A rated current for compatible low-voltage circuits.
• 500 mA rated residual operating current for earth-leakage protection.
• Type AC characteristic for sinusoidal alternating residual currents.
• 2-pole configuration for suitable single-phase applications.
• Designed to combine with a compatible ABB MCB for coordinated residual-current and overcurrent protection.
• Part of the established ABB DDA200 residual current block range.
• Modular construction for integration into electrical distribution boards and panels.

Key Features

• ABB DDA200 residual current block series.
• 2-pole configuration.
• 25 A rated current.
• 500 mA rated residual operating current.
• Type AC residual-current characteristic.
• Designed for combination with compatible ABB miniature circuit breakers.
• Provides residual-current protection as part of the assembled protective device.
• Modular format for low-voltage electrical distribution systems.
• Suitable for ABB System pro M compact installations.

Reliable Residual-Current Protection for Electrical Circuits

The ABB DDA202 AC-25/0.5 provides residual-current detection when assembled with a compatible ABB miniature circuit breaker. An imbalance between currents flowing through the protected conductors can indicate leakage to earth, allowing the combined protective device to disconnect the circuit when the residual current reaches its specified operating threshold.

The DDA200 modular approach allows residual-current protection to be combined with the overload and short-circuit protection supplied by a compatible MCB. With a 500 mA rated residual operating current and Type AC characteristic, this model is intended for suitable applications requiring detection of sinusoidal alternating earth-leakage currents at the specified threshold.

Typical Applications

• Low-voltage electrical distribution boards.
• Commercial electrical distribution systems.
• Industrial distribution and control panels.
• Suitable single-phase circuits requiring residual-current protection.
• Electrical circuits requiring a 500 mA residual-current threshold.
• ABB System pro M compact modular protection assemblies.
• Applications requiring a 25 A Type AC residual current block.