2N3906 PNP General Purpose Transistor – KSH 5 at HIMASTORES Mombasa – best electronics in Kenya
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2N3906 PNP General Purpose Transistor

SKU: HMJ140 Category: Transistors
KSH 5.00
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Product Description

2N3906 PNP General Purpose Transistor

Low-Power PNP Transistor for Switching and Amplification

The 2N3906 is a widely used PNP bipolar junction transistor (BJT) designed for generalpurpose lowpower switching and amplification applications [citation:1][citation:4]. It serves as the complementary PNP counterpart to the popular 2N3904 NPN transistor [citation:4][citation:8].

Continuous Collector Current: 200mA [citation:1][citation:4][citation:5]
CollectorEmitter Voltage: 40V [citation:1][citation:4][citation:5]
Transistor Polarity: PNP. Package: TO92 (throughhole) [citation:1][citation:4].
Serves as the complementary PNP pair to the 2N3904 NPN transistor [citation:2][citation:4][citation:8].
Use for high-side switching where it controls the connection between the power source and the load [citation:8].

Technical Specifications

ParameterValue
:-:-
PolarityPNP
Collector Current (IC)200mA (max) [citation:1]
Collector-Emitter Voltage (VCEO)-40V (max) [citation:1]
Emitter-Base Voltage (VEBO)-5V (max) [citation:1]
Power Dissipation (PD)625mW (TO-92) [citation:5]
DC Current Gain (hFE)100-300 [citation:1]
Transition Frequency (fT)250MHz [citation:1][citation:12]
Package TypeTO-92 [citation:1][citation:4]

= Pin Configuration (TO-92, Flat Side Facing) =

PinNameDescription
:-:-:-
1EmitterCurrent flows out through the emitter
2BaseControls the transistor switching
3CollectorCurrent flows into the collector

## Key Features and Applications

Complementary PNP to 2N3904 The NPN counterpart for pushpull amplifier circuits [citation:4][citation:8].

HighSpeed Switching Features a 250MHz transition frequency for fast switching applications [citation:1][citation:12].

GeneralPurpose Use Ideal for low-power switching loads (LEDs, relays) and signal amplification [citation:1][citation:4].

# Applications

  1. High-side switching of small loads [citation:7][citation:8].
  2. Low-power audio preamplifier stages [citation:8].
  3. Logic level shifting and inversion circuits [citation:3][citation:10].
  4. General-purpose switching and amplification tasks.
Versatile Component - A standard "jellybean" part widely used in hobbyist and professional electronics [citation:4][citation:8].
ThroughHole Package Compatible with breadboards and PCBs.

√ Works with 3.3V and 5V logic systems.

√ Complimentary to 2N3904 for push-pull configurations [citation:4][citation:8].

## Troubleshooting

Transistor not switching:

  • Verify base is pulled low (to ground) relative to emitter to turn on the PNP transistor [citation:8].
  • Check base resistor value (typically 1kΩ to 10kΩ).
  • Ensure load current does not exceed 200mA [citation:1].

Excessive heat:

  • Verify load is within 200mA and 40V limits [citation:1][citation:4].
  • Confirm correct pinout orientation.