Siemens BB 639C User's Manual
Summary
This technical documentation provides comprehensive specifications for the BB 639C Silicon Variable Capacitance Diode. Designed specifically for tuning extended frequency bands in VHF TV and VTR tuners, this component ensures precise circuit performance across diverse operating conditions. The manual details critical electrical characteristics, including capacitance variation curves against frequency and voltage, maximum ratings (voltage, current), and temperature coefficients. This resource is essential for electronics engineers and RF design professionals integrating reliable high-frequency tuning circuitry into tuner systems.
Page 1 Text Content
BB 639C
Silicon Variable Capacitance Diode
• For tuning of extended frequency band in VHF TV / VTR tuners
Type Marking Ordering Code Pin Configuration Package BB 639C yellow S Q62702-B695 1 = C 2 = A SOD-323
Maximum Ratings Parameter Symbol Value Unit Diode reverse voltage VR Peak reverse voltage (R ≥ 5kΩ) VRM Forward current IF m A Operating temperature range -55 ...+125 °C Storage temperature Tstg -55 ...+150
Semiconductor Group Apr-30-19981
Page Summary Contents For Siemens BB 639C User's Manual
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 3 |
| File Size | 47.97 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the application of the BB639C diode?
It is for tuning extended frequency bands in VHF TV/VTR tuners.
What are the maximum ratings for the device?
The max reverse voltage (VR) is 30 V; the peak reverse voltage (R) is 35 V.
What temperature range can it operate in?
It operates from -55°C to +125°C. Storage range is -55°C to +150°C.
How low is the minimum reverse current when V=30V at 85°C?
The minimum DC reverse current (I_R) is 10 pA at T=85°C, V=30V.