The BB545 from Infineon Technologies is a Varactor Diode with Capacitance 20.0 pF (CT1), 14.8 pF(CT2), Capacitance Ratio 7.2 (2/25V), Forward Continous Currenrt 20.0 mA, Peak reverse voltage 30 V, Reverse Voltage 30 V. Tags: Surface Mount. More details for BB545 can be seen below.