# FDC637AN

**TECH PUBLIC** · MOSFETs · SOT-23-6

FDC637AN from TECH PUBLIC, in a SOT-23-6. 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 | D | passive | Drain, internally common with pins 2, 5 and 6; VDS rated 20 V and continuous ID 7 A. |
| 2 | D | passive | Drain, internally common with pins 1, 5 and 6; VDS rated 20 V and continuous ID 7 A. |
| 3 | G | input | Gate; VGS rated ±12 V absolute maximum, threshold 0.40 V min to 1 V max at 50 µA. |
| 4 | S | passive | Source of the N-channel MOSFET; continuous ID 7 A. |
| 5 | D | passive | Drain, internally common with pins 1, 2 and 6; VDS rated 20 V and continuous ID 7 A. |
| 6 | D | passive | Drain, internally common with pins 1, 2 and 5; VDS rated 20 V and continuous ID 7 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | Transistors/Thyristors |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `FDC637AN`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `fdc637an-etched.step` / `fdc637an-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fdc637an.step` / `fdc637an.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590279009767620608) (4 pp, sha256 `9ff6ed6446c8fbe1`, retrieved 2026-10-19, 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/fdc637an-datasheet.pdf)