Product Overview
Vintage Gold Texas Instruments 2N388A NPN Germanium Transistor, Unused New Old Stock
The Texas Instruments 2N388A is a classic NPN germanium transistor built in a TO-5 metal can package with gold-plated leads. Originally produced during the mid-20th century semiconductor boom, it served in early low-power amplifier and switching circuits where low noise and high linearity were essential.
This transistor represents the craftsmanship of Texas Instruments’ early solid-state manufacturing era — combining germanium’s smooth signal response with durable gold-lead construction. It remains a valued part for restoration, experimentation, and period-correct audio or RF circuit builds.
Product Condition
Unused, New Old Stock. Clean and in excellent condition. Stored in original packaging with no signs of corrosion or oxidation. Gold leads bright and intact.
Product Overview
The 2N388A offers low-noise amplification and moderate switching capability at up to 200 mA collector current. Its germanium junction allows operation at lower voltage drops than silicon equivalents, making it well-suited for audio, signal, and experimental applications. The TO-5 metal case ensures good thermal performance and mechanical protection in compact assemblies.
Key Features
- Brand: Texas Instruments
- Model: 2N388A
- Polarity: NPN
- Semiconductor Material: Germanium
- Maximum Collector-Base Voltage: 40V
- Maximum Emitter-Base Voltage: 15V
- Maximum Collector Current: 0.2A (200mA)
- Collector Dissipation: 0.15W
- Transition Frequency (ft): ~5 MHz
- DC Current Gain (hFE): ≥60
- Package: TO-5 metal can with gold-plated leads
- Operating Junction Temperature: Up to 100°C
- Country of Manufacture: USA
Applications
- Low-frequency and audio amplification
- Preamplifier and tone-control stages
- Radio receivers and transmitters
- Signal switching and small-signal control
- Vintage electronics restoration projects
- DIY audio and experimental analog designs
- Educational demonstration of germanium transistor behavior
Frequently Asked Questions
What makes germanium transistors like the 2N388A unique?
Germanium devices exhibit lower forward voltage drop and smoother conduction at low signal levels, often giving vintage circuits their distinctive warmth and response.
Why are the leads gold-plated?
Gold plating resists oxidation and ensures reliable solderability even after long storage, extending the part’s usable lifespan.
Is this transistor still functional after decades of storage?
Yes. As unused new old stock, units have been stored in controlled conditions and maintain electrical integrity when properly handled.
Can this be substituted for silicon transistors?
Not directly. Germanium devices have different voltage characteristics and should be used where original circuit biasing supports their properties.
What era does this component come from?
The 2N388A was part of Texas Instruments’ 1960s germanium transistor line, commonly used in test equipment, radios, and early audio electronics.
Born from the early age of solid-state engineering, the Texas Instruments 2N388A carries the warmth and precision of germanium design — ready to bring authentic tone and history into your next project.
