Transistor BC179 PNP 20 V 50 mA 300 mW TO-18

Transistor BC179 PNP, 50mA TO-18

Transistors

Reference: TRBC179

Part.No: BC179

€0.60

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The BC179 is a low-noise PNP Bipolar Junction Transistor (BJT) in a metal TO-18 package. Designed for small-signal audio amplification and general-purpose switching in vintage and modern low-power circuits.

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Description
Product Details

BC179 Low-Noise PNP Transistor - Audio Grade Small Signal

The BC179 is a PNP small-signal transistor housed in a metal TO-18 can, historically favored for its low-noise characteristics in audio preamplifier stages. It remains a solid choice for repairing vintage equipment or building low-level signal amplifiers where a quiet PNP device is required.

Functions & Applications

Low-Noise Design: Well suited for audio preamp and low-level signal stages.
Metal TO-18 Package: Rugged can-style housing offering good thermal stability.
PNP Polarity: Useful for complementary designs alongside NPN counterparts like the BC109.
General-Purpose Switching: Handles small relays, LEDs and low-current loads reliably.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-18
Collector-Emitter Voltage (Vceo)	20V
Max Collector Current (Ic)	50mA
Power Dissipation (Pd)	300mW
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary NPN part for the BC179?
A: The BC179 is generally paired with NPN low-noise counterparts from the BC109/BC107 family for complementary amplifier designs.

Q: Is the BC179 suitable for audio circuits?
A: Yes, it was originally developed as a low-noise device and works well in preamplifier or small-signal audio stages within its 20V/50mA/300mW limits.

Notes

This is a legacy/vintage part, commonly used for servicing older audio equipment; newer designs typically use modern low-noise PNP alternatives.

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-18

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