Siemens BB 640 User Manual - (1)(1) Specifications
Summary
This variable capacitance diode (Varactor), BB 640, is a highly stable component designed for precision RF tuning circuits. This technical manual provides comprehensive specifications, including maximum ratings, electrical performance characteristics, and detailed operational parameters—such as the relationship between capacitance ($C_T$), reverse voltage ($V_R$), and frequency ($f$). It is targeted at professional engineers and electronics designers working on complex modules like TV/VTR tuners or any application requiring reliable, adjustable capacitance control across wide temperature ranges.
Page 1 Text Content
BB 640
Silicon Variable Capacitance Diode BB 640
For Hyperband TV/VTR tuners, Bd I
Type Ordering Code Pin Configuration Marking Package
(tape and reel)
BB 640 Q62702-B589 red S SOD-323
Maximum Ratings Parameter Symbol Values Unit Reverse voltage VR
5 kΩ) VRMReverse voltage (R
Forward current IF m A
Operating temperature range – 55 … + 150 ˚C Storage temperature range Tstg – 55 … + 150
Thermal Resistance
Junction - ambient Rth JA ≤ 450 K/W
Semiconductor Group 02.96
Page Summary Contents For Siemens BB 640 User Manual - (1)(1) Specifications
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 2 |
| File Size | 43.83 KB |
| Published | June 02, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the maximum reverse voltage rating for this diode?
The maximum reverse voltage (VR) is listed as 30 V.
Under what temperature range can the component operate?
The operating temperature range is from -55 to +150 °C.
What is the recommended thermal resistance (RthJA)?
The junction to ambient thermal resistance (RthJA) must be less than or equal to 450 K/W.
How does the component perform at higher temperatures?
At an operating temperature of 85 °C, the maximum reverse current (IR) is 200 nA.