Product Overview
Low-Noise Small-Signal Audio Amplifier Transistor 50V TO-92 - Signetics 2N5086
Product Condition
Unused, New Old Stock. Signetics-branded 2N5086 PNP silicon transistor in TO-92 package. Parts are unused and in excellent physical condition with clean leads. No additional accessories included.
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Product Overview
Signetics 2N5086 is a silicon PNP small-signal transistor designed for low-level, high-gain amplification where noise control matters. Housed in the standard TO-92 package, it is rated for 50V collector-emitter voltage and up to 50mA continuous collector current. With typical DC gain ranging from 150 to 450 at 1mA, it offers higher gain than general-purpose PNP types such as the 2N3906.
This device is specified for low noise performance, with a typical noise figure around 1.2 dB under defined test conditions. That combination of gain stability and low-frequency noise characteristics made it a common choice in phono preamps, microphone stages, and other high-impedance audio inputs during the 1970s and 1980s. Signetics production is particularly recognized in vintage audio restoration circles.
Key Features
- Polarity: PNP silicon transistor
- Package: TO-92 plastic through-hole
- Collector-Emitter Voltage (VCEO): 50V max
- Collector-Base Voltage (VCBO): 50V max
- Continuous Collector Current (IC): 50mA standard rating
- Power Dissipation: 625mW at 25°C ambient
- DC Current Gain (hFE): typically 150-450 at IC = 1mA
- Low Noise Figure: typically 1.2 dB under specified test conditions
- Standard TO-92 pinout: Emitter-Base-Collector when facing flat side, leads down
- Complement to NPN types such as 2N5088 / 2N5089
Applications
- Phono preamplifier input stages
- Microphone preamp circuits
- Vintage audio equipment restoration
- Guitar pedal and effects builds
- Low-level signal amplification in test fixtures
- Educational electronics labs and prototyping
- Replacement for original 2N5086 in legacy designs
Frequently Asked Questions
Will this work in place of a 2N3906?
In many low-current PNP amplifier circuits, yes. The 2N5086 typically offers higher gain and lower noise. Always verify pinout and electrical requirements in your specific circuit before substitution.
Is this suitable for phono or microphone preamps?
Yes. The 2N5086 is commonly used in high-impedance, low-level audio stages where low noise and stable gain are important.
What is the pinout?
For the standard TO-92 package, facing the flat side with leads pointing downward, the typical configuration is Emitter, Base, Collector. Confirm with a tester if your design is sensitive to lead orientation.
How does it compare to the 2N5087?
The 2N5087 generally has higher gain. The 2N5086 is often selected where moderate high gain and circuit stability are preferred over maximum amplification.
Low-noise transistors defined the front end of countless audio circuits. If you're rebuilding a classic preamp or dialing in a new design, this small PNP is ready for its next board.
