2N3638 – General Purpose PNP Transistor 

Vintage silicon PNP transistor for audio amplifiers, switching circuits, and industrial controls – military-spec reliability!

🔍 Key Features

✔ PNP Bipolar Junction Transistor – Negative-positive-negative configuration
✔ High Voltage Tolerance – Vceo: -40V, Ic: -500mA
✔ Low Noise – Ideal for audio preamp stages
✔ Mil-Spec Heritage – Originally designed for rugged applications

📊 Technical Specifications

• Type: PNP BJT

• Voltage Ratings:

  • Vceo: -40V (Collector-Emitter)

  • Vcbo: -40V (Collector-Base)

• Current Ratings:

  • Ic: -500mA (Continuous Collector)

  • Ib: -50mA (Base Current)

• Gain (hFE): 40-120 @ 10mA

• Power Dissipation: 625mW

🔧 Classic Applications

✅ Audio Amplifiers – Class A/B push-pull stages
✅ Industrial Switches – Relay/motor drivers
✅ Vintage Radio Repair – AM/FM receiver circuits
✅ Voltage Regulators – Complementary pair with NPN