The BB804 from Infineon Technologies is a Varactor Diode with Capacitance 47.5 pF (CT1), 27.9 pF(CT2), Capacitance Ratio 1.71 (2/8V), Forward Continous Currenrt 50.0 mA, Peak reverse voltage 18 V, Reverse Voltage 18 V. Tags: Surface Mount. More details for BB804 can be seen below.