# FQA28N50

**onsemi** · MOSFETs · TO-3P-3

FQA28N50 from onsemi, in a TO-3P-3. 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 | G | input | Gate; gate-source voltage limited to ±30 V absolute maximum, with VGS(th) of 3.0 to 5.0 V at ID = 250 µA. |
| 2 | D | passive | Drain; drain-source voltage 500 V maximum and continuous drain current 28.4 A at TC = 25°C (113.6 A pulsed). |
| 3 | S | passive | Source; the body diode carries a continuous forward current of up to 28.4 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-3P-3 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `FQA28N50`
- Footprint: `Package_TO_SOT_THT:TO-3P-3_Vertical`
- 3D model: TO-3P-3 (KiCad packages3D, STEP)
- 3D model files: `fqa28n50-etched.step` / `fqa28n50-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fqa28n50.step` / `fqa28n50.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/8588896257900728320) (8 pp, sha256 `9a86516a93ff6458`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/fqa28n50-datasheet.pdf)