Infineon BBY5702VH6327XTSA1 — single tuning diode for VCO and filter control
The Infineon BBY5702VH6327XTSA1 is a single silicon tuning (varactor) diode in a SC-79 / SOD-523 surface-mount package. It delivers a capacitance ratio of 4.5 measured from 1V to 4V reverse bias, giving a practical tuning range for LC resonant circuits operating up to its 10 V peak reverse maximum.
The capacitance ratio is 4.5, defined as C1/C4. At 4 V and 1 MHz the capacitance is 5.5 pF. That ratio determines how wide a frequency band the diode can sweep in a resonant tank.
The wide range also covers military-spec and avionics environments where the part might sit on a VCO board inside a sealed LRU.
Housed in a SC-79 / SOD-523 package (Infineon code PG-SC79-2), it is a two-pin surface-mount device.