What Is the 2N3906? PNP Transistor: Pinout and Uses
The 2N3906 is a common PNP bipolar transistor and the complement of the NPN 2N3904. It is used for small-signal amplification and low-current (≤200 mA, −40 V) high-side switching. Its TO-92 pinout is E-B-C (same order as the 2N3904); it conducts when the base is pulled low.
The 2N3906 is a very common PNP bipolar transistor (BJT) and the complement of the NPN 2N3904. It is used for small-signal amplification and low-current switching, especially high-side switching. For the concept, see what is a BJT.
What is the 2N3906 used for?
Being PNP it suits high-side load switching (emitter to VCC), push-pull stages (with the 2N3904) and small-signal amplification. It conducts when the base is pulled low.
2N3906 pinout (TO-92)
Flat face front, left to right: E – B – C (same order as the 2N3904).
| Lead | Function |
|---|---|
| 1 | Emitter (E) |
| 2 | Base (B) |
| 3 | Collector (C) |
Specifications
| Parameter | Value |
|---|---|
| Type | PNP BJT |
| VCEO | −40 V |
| IC | −200 mA |
| hFE | ~100–300 |
Equivalents
- 2N3904: the NPN complement.
- 2N2907: a higher-current PNP.
- BC557: the European PNP equivalent (different pinout).
Find it in our catalog
Use the 2N3906 search.