2CSB204401R1400 ABB DDA204A400.03APR DDA204 A-40/0.03 AP-R RCD 4P Type A 30mA 40A

Why Choose the ABB DDA204A400.03APR RCD Block?

The ABB DDA204A400.03APR is a four-pole Type A AP-R residual current device (RCD) block designed for assembly with compatible ABB miniature circuit breakers. Part of the ABB DDA200 RCD series, it combines high-sensitivity residual-current protection with ABB's AP-R high-immunity technology to help reduce unwanted tripping while maintaining dependable electrical protection.

Rated at 40 A with a rated residual operating current of 30 mA, the DDA204A400.03APR detects sinusoidal alternating and pulsating DC residual currents. Its AP-R anti-nuisance tripping characteristic offers enhanced resistance to transient disturbances, including surge-current resistance of 3 kA with an 8/20 µs waveform.

With its four-pole configuration and 230/400 V AC rated voltage, the DDA204A400.03APR is suitable for residential, commercial and industrial three-phase systems with neutral. When assembled with a compatible ABB miniature circuit breaker, it provides residual-current protection alongside the overload and short-circuit protection supplied by the associated breaker.

Key Advantages

• Type A residual current protection for sinusoidal AC and pulsating DC earth-fault currents.
• AP-R high-immunity technology helps reduce unwanted tripping and improve continuity of service.
• 30 mA sensitivity provides high-sensitivity residual-current protection and additional protection against direct contact when correctly applied.
• 3 kA surge-current resistance with an 8/20 µs waveform.
• 40 A rated current for compatible branch and distribution circuits.
• Four-pole configuration suitable for three-phase systems with neutral.
• Designed for assembly with compatible ABB S200 series and S300P miniature circuit breakers.

Key Features

• ABB DDA200 AP-R series.
• Type A AP-R residual current characteristic.
• High-immunity / anti-nuisance tripping design.
• 40 A rated current.
• 30 mA residual current sensitivity.
• 4-pole design.
• 230/400 V AC rated voltage.
• 50–60 Hz rated frequency.
• 3 kA maximum surge-current resistance.
• 10,000-cycle electrical endurance.

High-Immunity Type A AP-R Residual Current Protection

The ABB DDA204A400.03APR combines Type A residual-current detection with ABB's AP-R high-immunity technology. It responds to sinusoidal alternating and pulsating DC residual currents while providing increased resistance to unwanted tripping caused by transient disturbances, helping maintain continuity of service in installations containing electronic equipment and other loads that can generate temporary leakage-current peaks.

Its 30 mA operating threshold provides high-sensitivity residual-current protection, including additional protection against direct contact when correctly selected and installed. The 3 kA surge-current resistance further improves immunity to impulsive leakage currents. Overload and short-circuit protection are supplied by the compatible miniature circuit breaker assembled with the DDA204A400.03APR.

Typical Applications

• Residential three-phase electrical distribution systems.
• Commercial electrical installations.
• Industrial electrical distribution systems.
• Three-phase circuits with neutral.
• Installations where continuity of service and resistance to unwanted tripping are important.
• Circuits containing electronic equipment capable of producing pulsating DC residual currents.
• Distribution and control panels requiring 30 mA Type A protection.
• ABB modular circuit protection assemblies.