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2N3906

Public Made by Adom

by adom

onsemi general-purpose PNP BJT, TO-92. 40 V, 200 mA, hFE 100-300. Complement of 2N3904. Datasheet-verified.

componenttransistorbjtpnpto-92onsemi
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Contents

README

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2N3906

onsemi · PNP BJT (general purpose) · TO-92

The 2N3906 is the standard general-purpose PNP bipolar transistor, the direct complement of the NPN 2N3904, in a TO-92 through-hole package. It switches and amplifies small signals up to about 200 mA and 40 V with a current gain (hFE) of roughly 100 to 300, so it handles high-side switching, PNP current sources, and small-signal gain. Being PNP, it turns on when the base is pulled below the emitter. The TO-92 leads are E, B, C in order (pin 1 = emitter).

Pinout

Pin Name Type Function
1 E passive Emitter of the PNP BJT. VEBO breakdown = 5.0 V (reverse). In normal PNP operation the emitter is the most positive terminal, with current flowing from emitter to collector.
2 B input Base of the PNP BJT. Control terminal; pulling the base below the emitter by ~0.65-0.85 V (VBE(sat)) forward-biases the B-E junction and turns the transistor on. IBL (base cutoff) = 50 nA max at VBE = 3.0 V.
3 C passive Collector of the PNP BJT. VCEO breakdown = 40 V (reverse), VCBO = 40 V, IC = 200 mA continuous. VCE(sat) = 0.25 V max at IC = 10 mA, IB = 1.0 mA. In normal PNP operation the collector sinks current toward the more-negative supply.

Key specifications

Parameter Value
Type PNP bipolar transistor
Collector-emitter (VCEO) -40 V
Collector current (IC) -200 mA
DC gain (hFE) 100-300
Transition freq (fT) 250 MHz
Power dissipation 625 mW
Pinout E-B-C (pin 1 = emitter)
Package TO-92

Ordering variants

  • 2N3906BU (TO-92)
  • 2N3906TA (TO-92, ammo pack)

CAD (KiCad official)

  • Symbol: Transistor_BJT:2N3906
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D)
  • 3D model files: 2n3906-etched.step / 2n3906-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2n3906.step / 2n3906.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (6 pp, sha256 0173a9cdd84dfe57, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF