This document describes the features and characteristics of BB 639C semiconductor, including silicon variable capacitance diode for tuning of extended frequency band in VHF TV / VTR tuners, maximum ratings, electrical characteristics, and temperature coefficient.
The BB 639C is a silicon variable capacitance diode intended for tuning extended frequency band VHF TV and VTR tuners. It is supplied in a SOD‑323 package and marked with the ordering code Q62702‑B695.
The document lists maximum voltage and current ratings, operating temperature ranges, and detailed DC and AC electrical characteristics, including capacitance values at various bias voltages and frequencies, series resistance, inductance, and temperature coefficients.
| Reverse voltage (Va) | 30 V |
|---|---|
| Peak reverse voltage (R = 5kΩ) | 35 V |
| Forward current | 20 mA |
| Operating temperature range | -55 … 125 °C |
| Storage temperature | -55 … +150 °C |
| Reverse current (Va=30V) | 10 nA |
| Reverse current (Vp=30V, Ta=85°C) | 200 nA |
| Capacitance ratio Crol/CT25 | 9.5 |
| Capacitance ratio Cy4/Cy2g | 13.5 |
| Capacitance matching (ACy/Cy) | 2.5 % |
| Series inductance (Ls) | 1.8 nH |
| Temperature coefficient of capacitance | 10 % |
The diode can withstand a reverse voltage of 30 V.
The specified forward current is 20 mA.