MMBT3906 PNP Transistor

@@ -0,0 +1,46 @@+# 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++- `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](https://www.diodes.com/assets/Datasheets/MMBT3906.pdf) (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](docs/mmbt3906-datasheet.pdf)

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