The ABB DDA202 AC‑63/0.03 Residual Current Device (RCD) is a modular residual current protective block designed for assembly with compatible miniature circuit breakers (MCBs) on DIN rails. It provides reliable protection against the effects of sinusoidal alternating earth fault currents, offering enhanced safety by detecting and interrupting leakage currents to earth. With a rated current of 63 A and a residual tripping sensitivity of 30 mA, this device helps prevent electric shock risks and protects people and equipment in residential, commercial, and industrial electrical installations. It meets applicable international safety standards and is suitable for use in 230/400 V AC power systems with 50 / 60 Hz frequency.
