Transistor BF509 PNP, 30mA TO-92

Transistor BF509 PNP, 30mA TO-92

Transistors

Reference: TRBF509

Part.No: BF509

€1.00

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The BF509 is a PNP Bipolar Junction Transistor (BJT) in a TO-92 package, specifically designed for VHF/UHF amplification and mixing applications. Ideal for vintage TV tuners, FM radios and high-frequency signal processing circuits.

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Description
Product Details

BF509 PNP Transistor - High-Frequency Amplification for VHF/UHF Tuners

The BF509 is a specialized PNP transistor engineered for high-frequency amplification in television tuners and FM radio receivers. With excellent gain stability across VHF and UHF bands, it remains a reliable choice for vintage equipment repair and RF signal processing applications.

Functions & Applications

VHF/UHF Optimized: Maintains stable gain across television and FM frequency bands without oscillation.
High-Frequency Performance: Designed specifically for RF amplification and mixing in tuner circuits.
Compact TO-92 Package: Easy to replace in vintage equipment and breadboard prototyping.
Excellent Linearity: Provides clean amplification with minimal distortion at high frequencies.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	20V
Max Collector Current (Ic)	30mA
Power Dissipation (Pd)	300mW
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: Can the BF509 be used as a replacement in vintage TV tuners?
A: Yes. The BF509 is commonly used in UHF/VHF tuner stages of older television sets. Always check bias and load resistance to ensure proper frequency response.

Q: Is the BF509 suitable for modern FM radio applications?
A: Yes, it performs excellently at FM frequencies (88–108 MHz) and beyond, making it ideal for both vintage and modern low-power RF projects.

Notes

Vintage PNP RF transistor; still found in working TV tuner modules. Excellent for restoration projects and RF hobbyist circuits.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: PNP
Transistor Case Style: TO-92

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