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BB910 TO-92 Varactor Diode — RF Tuning, VCO, FM Circuits (10-Pack)
BB910 TO-92 Varactor Diode RF Tuning, VCO, FM Circuits (10-Pack)
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BB910 TO-92 Varactor Diode — Voltage-Controlled Capacitance for RF Circuits
The BB910 is a silicon varactor (variable capacitance) diode in a compact TO-92 through-hole package, designed for voltage-controlled tuning in RF and high-frequency applications. As reverse bias voltage increases, junction capacitance decreases predictably — making it ideal for VCO, PLL, and FM tuner designs.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | BB910 |
| Package | TO-92 (DIP, Through-Hole) |
| Max Reverse Voltage (VR) | 30V |
| Capacitance @ 1V (CT) | ~10pF |
| Capacitance Ratio (C1V/C8V) | ≥3.5 |
| Series Resistance (RS) | Low (high Q factor) |
| Operating Temperature | -55°C to +150°C |
| Condition | New, Original |
| Origin | Mainland China |
Why Choose BB910?
- Wide tuning range — capacitance ratio ≥3.5 enables broad frequency sweep
- Low series resistance — high Q factor minimizes signal loss in RF tanks
- TO-92 package — easy breadboard and PCB prototyping, no SMD rework needed
- New & original — not remarked or pulled parts
- 10-pack value — enough for multiple VCO or tuner stages
Typical Applications
- VCO (Voltage-Controlled Oscillator) — FM transmitters, signal generators
- FM/AM tuner circuits — electronic channel selection replacing mechanical capacitors
- PLL (Phase-Locked Loop) — frequency synthesis and clock recovery
- AFC (Automatic Frequency Control) — receiver stabilization
- Parametric amplifiers — low-noise RF amplification
- Filter tuning — voltage-adjustable bandpass filters
Compatible With
Drop-in or equivalent replacement for BB105, BB109, BB204, BB304, BB405, BB505 in many VCO and tuner designs. Verify capacitance curve against your schematic before substitution.
FAQ
Q: What is the capacitance at 4V reverse bias?
A: Typically ~5–6pF for BB910. Refer to the datasheet C-V curve for precise values at your operating voltage.
Q: Can BB910 be used at VHF/UHF frequencies?
A: Yes. The low series resistance and small junction capacitance make it suitable for VHF (30–300MHz) and lower UHF applications.
Q: Is this RoHS compliant?
A: Yes, lead-free TO-92 package.
Package Contents
- 10× BB910 TO-92 Varactor Diode (new, original)
