component
MMBT3904-7-F
Public Made by Adomby adom
Diodes Incorporated Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMBT3904-7-F
Diodes Incorporated · Bipolar (BJT) · SOT-23
MMBT3904-7-F from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Base | input | NPN transistor control input with DC current gain (hFE) of 40-300 A/A and base-emitter saturation voltage (VBE(sat)) maximum 0.95V at IC = 50mA, IB = 5mA. |
| 2 | Emitter | passive | Emitter terminal with maximum emitter-base voltage (VEBO) rating of 6V, forward voltage approximately 0.85V at saturation. |
| 3 | Collector | passive | Collector terminal with maximum collector current (IC) rating of 200 mA, maximum collector-emitter voltage (VCEO) of 40V, maximum collector-base voltage (VCBO) of 60V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBT3904-7-F - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt3904-7-f-etched.step/mmbt3904-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt3904-7-f.step/mmbt3904-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (7 pp, sha256
4dc9117615e6d219, retrieved 2026-09-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).
Annotated 3D hero
The hero adds canonical translucent pad outlines, footprint silkscreen/pin1 and Base/Emitter/Collector labels to the retained marked KiCad-derived physical model. The clean board model and STEP files are unchanged. Per-file provenance records input/output hashes and generator identity; overlay metadata records the artwork. Canonical viewer top and underside views were inspected. This is a presentation repair, not fresh physical qualification. Component issues.
# MMBT3904-7-F
**Diodes Incorporated** · Bipolar (BJT) · SOT-23
MMBT3904-7-F from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Base | input | NPN transistor control input with DC current gain (hFE) of 40-300 A/A and base-emitter saturation voltage (VBE(sat)) maximum 0.95V at IC = 50mA, IB = 5mA. |
| 2 | Emitter | passive | Emitter terminal with maximum emitter-base voltage (VEBO) rating of 6V, forward voltage approximately 0.85V at saturation. |
| 3 | Collector | passive | Collector terminal with maximum collector current (IC) rating of 200 mA, maximum collector-emitter voltage (VCEO) of 40V, maximum collector-base voltage (VCBO) of 60V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `MMBT3904-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt3904-7-f-etched.step` / `mmbt3904-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt3904-7-f.step` / `mmbt3904-7-f.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560107457311252480) (7 pp, sha256 `4dc9117615e6d219`, retrieved 2026-09-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/mmbt3904-7-f-datasheet.pdf)
## Annotated 3D hero
The hero adds canonical translucent pad outlines, footprint silkscreen/pin1 and Base/Emitter/Collector labels to the retained marked KiCad-derived physical model. The clean board model and STEP files are unchanged. [Per-file provenance](hero-provenance.json) records input/output hashes and generator identity; [overlay metadata](mmbt3904-7-f-hero.overlay.json) records the artwork. Canonical viewer top and underside views were inspected. This is a presentation repair, not fresh physical qualification. [Component issues](https://wiki.adom.inc/adom/mmbt3904-7-f/issues).