# MMBT3906LT1

**LGE** · Bipolar (BJT) · SOT-23

MMBT3906LT1 from LGE, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BASE | passive | Base terminal of the PNP transistor; the datasheet's peak base current limit is IBM = -100 mA. |
| 2 | EMITTER | passive | Emitter terminal of the PNP transistor; the emitter-base voltage limit is VEBO = -6 V (emitter-base voltage with open collector). |
| 3 | COLLECTOR | passive | Collector terminal of the PNP transistor; the datasheet limits are VCEO = -40 V (open base), DC collector current IC = -100 mA, and peak collector current ICM = -200 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MMBT3906LT1`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt3906lt1-etched.step` / `mmbt3906lt1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt3906lt1.step` / `mmbt3906lt1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884581629616128) (3 pp, sha256 `cd898b24bba5e6d6`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mmbt3906lt1-datasheet.pdf)