# MBT3904DW1T3G

**onsemi** · Bipolar (BJT) · SOT-363

MBT3904DW1T3G from onsemi, in a SOT-363. 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 | EMITTER 2 | passive | Emitter of transistor Q2 in the dual general-purpose NPN package, with the device rated 6.0 Vdc VEBO and 200 mAdc continuous collector current. |
| 2 | BASE 2 | input | Base of transistor Q2, with emitter-base breakdown voltage V(BR)EBO of at least 6.0 Vdc. |
| 3 | COLLECTOR 1 | passive | Collector of transistor Q1, with collector-emitter breakdown voltage V(BR)CEO of at least 40 Vdc and continuous collector current rated 200 mAdc. |
| 4 | EMITTER 1 | passive | Emitter of transistor Q1, with emitter-base rating 6.0 Vdc (VEBO). |
| 5 | BASE 1 | input | Base of transistor Q1, with base cutoff current limited to 50 nAdc maximum at VCE = 30 Vdc and VEB = 3.0 Vdc. |
| 6 | COLLECTOR 2 | passive | Collector of transistor Q2, with collector-base voltage rating 60 Vdc (VCBO). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-363 |
| Category | Transistors/Thyristors |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `MBT3904DW1T3G`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `mbt3904dw1t3g-etched.step` / `mbt3904dw1t3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mbt3904dw1t3g.step` / `mbt3904dw1t3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588929469800697856) (11 pp, sha256 `e92aac50e8abd4db`, 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/mbt3904dw1t3g-datasheet.pdf)