# YFW1012A-G

**YFW** · Bipolar (BJT) · SOT-223

YFW1012A-G from YFW, in a SOT-223. 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 | B | input | Base of the PNP transistor. Emitter-base breakdown voltage BVEBO = -5 V; base drive IB = -0.15 A used to achieve IC = -3 A saturation (VBE(on) = -1.2 V max). |
| 2 | C | passive | Collector of the PNP transistor (front-lead pin 2). Internally tied to the tab (pin 4). Collector-base breakdown BVCBO = -60 V, collector-emitter breakdown BVCEO = -50 V, IC(max) = -3 A, PC = 1 W. |
| 3 | E | passive | Emitter of the PNP transistor. Reference terminal for VCE and VBE; carries IE up to approximately -3 A in saturated operation. |
| 4 | C | passive | Collector tab (thermal pad) of the SOT-223. Electrically identical to pin 2; provides the primary thermal path to the PCB copper pour for dissipating up to 1 W. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOT-223 |
| Category | Transistors/Thyristors |
| Pins | 4 |

## Ordering variants

Same part, different packaging or reel option.

- `YFW1012A-Y`
- `YFW1012A-G`
- `YFW1012A-B`

## CAD (KiCad official)

- Symbol: `YFW1012A-G`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `yfw1012a-g-etched.step` / `yfw1012a-g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `yfw1012a-g.step` / `yfw1012a-g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604429693303345152) (None pp, sha256 `b7ef7d76bcfa5179`, retrieved 2026-08-17, tier: lcsc)
- **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/yfw1012a-g-datasheet.pdf)