2N109 The RCA 2N109 is a Germanium PNP Alloy Junction transistor introduced in 1955. It features a short-leaded case style designed for socket mounting and was commonly used in early audio and radio circuits.
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2N109

Available from 1 distributors
Mfr Name: SCI
SCI
The RCA 2N109 is a Germanium PNP Alloy Junction transistor introduced in 1955. It features a short-leaded case style designed for socket mounting and was commonly used in early audio and radio circuits.
Total Stock: 25 pcs
$ Price Range: $0.09

2N109 Available from 1 distributor

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25 pcs
25 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request

2N109 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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2N109 Description

Short technical summary and product information.

The RCA 2N109 is a historic Germanium PNP Alloy Junction transistor, first introduced in 1955. This device was a workhorse for the electronics industry, widely accepted as an affordable and reliable audio frequency amplifier.

 

It found extensive use in many early transistor radios from manufacturers like RCA, Emerson, Crosley, and Westinghouse, particularly in audio output circuitry. Notable applications include the Crosley 'Radio Disguised as a Book' series and the Fisher TR1 Transistor Preamp, which utilized multiple 2N109s.

 

RCA also promoted the 2N109 as a general-purpose, inexpensive device for hobbyists and experimenters. It was manufactured exclusively in a short-leaded version, designed for plug-in socket mounting. The similar 2N217 is the long-leaded variant.

 

Available in black metal (early) and silver metal (later) case styles, the 2N109 represents a significant component in the early development of transistor technology.

2N109 Quick Information

Product Type: Bipolar Transistor
Canonical Name: RCA 2N109 Germanium PNP Alloy Junction Audio Frequency Amplifier Transistor
Subcategory: Single

2N109 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

2N109 Estimated Pricing

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1+ $0.09 $0.09

Estimated market price range - modelled values for guidance only, not live distributor offers.

2N109 Features

  • Germanium PNP Alloy Junction type.
  • Introduced in 1955.
  • Available in black or silver metal cases.
  • Measures 3/16" OD x 1/2" H.
  • Short leaded for socket mounting.

2N109 Applications

  • Used in early transistor radios.
  • Suitable for audio output circuitry.
  • Applied in transistor preamplifiers.
  • Ideal for hobbyist experiments.

2N109 FAQs

6 frequently asked questions generated from this part’s specifications.
What type of transistor is the RCA 2N109?

The RCA 2N109 is a Germanium PNP Alloy Junction transistor.

When was the 2N109 transistor introduced?

The 2N109 transistor was introduced in 1955.

What are the typical applications for the 2N109?

The 2N109 is used for hobbyist/experimenter applications and early commercial audio and radio.

What are the available case styles for the 2N109?

The 2N109 is available in black metal (early) and silver metal (later) case styles.

What is the physical size of the 2N109 transistor?

The transistor size is approximately 3/16" OD x 1/2" H.

What is the packaging for the 2N109?

The 2N109 features a short-leaded case style for socket mounting and was available in 1960s RCA cardboard packaging with a styrofoam insert.

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