Siemens BB 639 User Guide and Manual
Summary
This detailed manual provides comprehensive specifications and electrical performance data for the BB 639 Silicon Variable Capacitance Diode. Engineered specifically for tuning extended frequency bands in VHF TV and VTR tuner applications, this component ensures high precision capacitance ratios and stable operation across demanding environments. Ideal for electronics engineers and RF designers, this guide covers maximum ratings, detailed DC characteristics, and operational parameters needed for reliable circuit design and development.
Page 1 Text Content
Silicon Variable Capacitance Diode BB 639
For tuning of extended frequency bands in VHF TV/VTR tuners
Type Ordering Code Pin Configuration Marking Package
(tape and reel)
BB 639 Q62702-B586 yellow S SOD-323
Maximum Ratings Parameter Symbol Values Unit
Reverse voltage VR
Reverse voltage (R kΩ) VRM
Forward current IF m A
Operating temperature range – 55 + 150 °C
Storage temperature range Tstg – 55 + 150 °C
Thermal Resistance
Junction-ambient Rth JA K/W
Semiconductor Group 10.94
Page Summary Contents For Siemens BB 639 User Guide and Manual
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 3 |
| File Size | 48.15 KB |
| Published | June 05, 2026 |
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Frequently Asked Questions
什么是BB 639二极管的主要用途？
它用于VHF TV/VTR调谐器中延长频率频段的调谐。
在使用BB 639时，其反向电压的最大额定值是多少？
最大反向电压为30 V (R) 和 35 V (R ≥ 5kΩ)。
BB 639在操作温度范围内可以承受多大的范围？
工作温度范围为 –55 °C 至 +150 °C。
这款二极管的最大正向电流和结-环境热阻分别是多少？
最大正向电流为20 mA (F)，热阻小于等于450 K/W。