BB910 Varactor Diode — TO-92, VHF/UHF Tuning, 30pF @ 1V, 10-Pack

BB910 Varactor Diode — TO-92, VHF/UHF Tuning, 30pF @ 1V (10-Pack)

The BB910 is a silicon varactor (variable capacitance) diode in TO-92 through-hole package — its junction capacitance varies with reverse bias voltage, making it function as a voltage-controlled capacitor. Used in voltage-controlled oscillators (VCOs), FM tuners, and RF frequency synthesis circuits where electronic frequency tuning is required without mechanical components. Pack of 10.

Electrical Specifications

• Part Number: BB910
• Package: TO-92 (through-hole)
• Type: Varactor (variable capacitance) diode
• Capacitance @ 1V: ~30pF (typical)
• Capacitance Range: Varies with reverse bias (typically 5–30pF over tuning range)
• Application Frequency: VHF / UHF (FM radio, TV tuner range)
• Max Reverse Voltage: 20V
• Pack Quantity: 10 diodes

How Varactor Diodes Work

• Reverse-biased PN junction acts as a capacitor — depletion region width = dielectric thickness
• Higher reverse voltage → wider depletion region → lower capacitance
• Lower reverse voltage → narrower depletion region → higher capacitance
• Voltage-controlled capacitance enables electronic frequency tuning

Typical Applications

• FM radio voltage-controlled oscillator (VCO)
• TV tuner electronic channel selection
• PLL frequency synthesizer tank circuit
• Voltage-controlled filter (VCF)
• RF modulator frequency deviation control

BB910 varactor diode, 10-pack — TO-92, ~30pF @ 1V, VHF/UHF for voltage-controlled oscillators, FM tuners, and RF frequency synthesis circuits.

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