T · Glossary
Type A RCD
A Type A RCD is a residual current device type intended to operate with AC residual current and pulsating DC residual current.
A Type A RCD is a residual current device classification for AC residual current and pulsating DC residual current. BEAMA describes Type A as tripping for alternating sinusoidal residual current and residual pulsating DC, suddenly applied or smoothly increasing. Its 6 mA smooth-DC limit matters in EV charging and other electronic-equipment contexts because higher DC residual current can impair a Type A RCD.
Category
Electrical supply and protection
Applies to
Solar, Battery storage, EV charging, Heat pumps & AC
Last reviewed
03 Jun 2026