GroupThe BAS21S is a dual 1.25-Volt@200-mA switching diode manufactured by Youtai Group in a SOT-23 package. It is a 250-Volt-rated discrete component with a maximum power dissipation of 225 milliwatts. The device’s switching times are incredibly fast response times of 50 nanoseconds. It is RoHS-compliant and offers many desirable operating specifications.