component

MMBT3906 PNP Transistor

Public Unreviewed

by Ray

General-purpose 40 V PNP transistor in SOT-23, the surface-mount 2N3906.

transistorbjtpnpswitchingsot-23diodes
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗
Contents

README

markdown

MMBT3906

Diodes Incorporated · Bipolar Transistor (BJT) · SOT-23

The MMBT3906 is the SOT-23 surface-mount version of the 2N3906 general-purpose PNP transistor. It handles up to 40 V and 200 mA, and is used for low-power high-side switching and small-signal amplification. It is the PNP complement of the NPN MMBT3904.

Pinout

Pin Name Type Function
1 B input Base terminal of the PNP BJT. Controls collector current via base-emitter forward bias (VBE(sat) typ -0.85V at IC = -10mA). Absolute max VEBO = -6.0V; peak base current IBM = -100mA.
2 E passive Emitter terminal of the PNP BJT. Common reference for base drive; typically connected to the positive supply in a high-side switch or common-emitter amplifier.
3 C passive Collector terminal of the PNP BJT. Rated VCBO = -40V, VCEO = -40V, IC = -200mA continuous / -350mA peak. VCE(sat) typ -0.25V at IC = -10mA, IB = -1.0mA.

Key specifications

Parameter Value
Type PNP bipolar transistor
Collector-emitter voltage (VCEO) -40 V
Collector current (IC) -200 mA
hFE 100 to 300 at IC = -10 mA
Transition frequency (fT) 250 MHz
Power dissipation 350 mW
Operating temperature -55 C to 150 C

Ordering variants

Same part, different packaging or reel option.

  • MMBT3906-7-F
  • MMBT3906-13-F

CAD (KiCad official)

  • Symbol: mmbt3906.kicad_sym
  • Footprint: mmbt3906.kicad_mod
  • 3D model: SOT-23 body from KiCad Package_TO_SOT_SMD/SOT-23.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 288d5958b9e1e1da, 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