# FDC5661N

**TECH PUBLIC** · MOSFETs · SOT-23-6

FDC5661N 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 of the N-channel MOSFET, internally common with pins 2, 5 and 6; VDS rated 60 V. |
| 2 | D | passive | Drain of the N-channel MOSFET, internally common with pins 1, 5 and 6; continuous drain current 5 A, pulsed 30 A. |
| 3 | G | input | Gate of the N-channel MOSFET; VGS rated ±20 V with threshold 1.0 V min to 3.0 V max. |
| 4 | S | passive | Source of the N-channel MOSFET; RDS(on) 25 mΩ typ at VGS=10 V, ID=3 A. |
| 5 | D | passive | Drain of the N-channel MOSFET, internally common with pins 1, 2 and 6. |
| 6 | D | passive | Drain of the N-channel MOSFET, internally common with pins 1, 2 and 5. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `FDC5661N`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `fdc5661n-etched.step` / `fdc5661n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fdc5661n.step` / `fdc5661n.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/8590236707582357504) (3 pp, sha256 `3b9df21e3e83543d`, 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/fdc5661n-datasheet.pdf)