BB 640 is a product of Dinghao. It is a silicon variable capacitance diode. It is used for Hyperband TV/VTR tuners. Its maximum reverse voltage is 30V, maximum forward current is 20mA, working temperature range is -55~+150℃, storage temperature range is -55~+150℃, and thermal resistance is 450K/W.
This datasheet describes the Siemens BB 640 silicon variable capacitance diode, including its ordering code, pin configuration, and package type (SOD‑323, tape and reel). It provides the maximum ratings such as reverse voltage, forward current, and temperature limits.
The electrical characteristics section gives typical and maximum values for reverse current, diode capacitance at various bias voltages and frequencies, series resistance, inductance, and capacitance matching. All values are specified at 25 °C unless otherwise noted.