The BBY66-05W from Infineon Technologies is a Varactor Diode with Capacitance 68.7 pF (CT1), 35.4 pF(CT2), Capacitance Ratio 5.41 (1/4.5V), Forward Continous Currenrt 50.0 mA, Peak reverse voltage 12 V, Reverse Voltage 12 V. Tags: Surface Mount. More details for BBY66-05W can be seen below.