Transistor BC549 NPN, 0.1A TO-92

Transistor BC549 NPN, 0.1A TO-92

Transistors

Reference: TRBC549

Part.No: BC549

€0.50

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The BC549 is a low-noise NPN Bipolar Junction Transistor (BJT) in a TO-92 package. Engineered for audio amplification, microphone preamps and sensitive signal processing where minimal noise is critical.

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Description
Product Details

BC549 Low-Noise NPN Transistor – Audio-Grade Amplification

The BC549 is a premium NPN transistor optimized for audio and low-noise applications. With exceptional gain stability and a carefully controlled noise figure, it is the preferred choice for microphone preamps, phono stages, guitar effects, and any circuit where signal purity is non-negotiable.

Functions & Applications

Low Noise Figure: Exceptional purity for microphone preamps, phono stages and studio equipment.
High DC Current Gain (hFE): Strong amplification of weak audio signals without requiring additional stages.
Tight Gain Selection: Matched units ensure consistent performance across matched-pair applications.
Standard TO-92 Package: Through-hole design, compatible with breadboards and PCBs.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	45V
Max Collector Current (Ic)	100mA
Power Dissipation (Pd)	500mW
Noise Figure	Low (optimized for audio)
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: Can I use BC549 as a direct replacement for BC547?
A: Yes. The BC549 is an audio-grade upgrade to the BC547 with lower noise. It will work perfectly as a drop-in replacement and will often improve signal purity in sensitive circuits.

Q: Is the BC549 suitable for microphone preamps?
A: Absolutely. The BC549 is specifically engineered for microphone preamplifiers and other low-noise audio stages. Its low noise figure makes it ideal for weak microphone signals.

Notes

Audio-grade transistor: select matched pairs for stereo applications. Not a NOS/vintage part—standard production.

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: NPN
Transistor Case Style: TO-92

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