# WSD40120DN56G

**Winsok Semicon** · MOSFETs · DFN5x6-8

WSD40120DN56G from Winsok Semicon, in a DFN5x6-8. 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 | S | passive | Source terminal of the N-channel MOSFET (VDS rated 40 V, continuous ID 120 A at TC=25℃ with VGS=10 V). |
| 2 | S | passive | Source terminal of the N-channel MOSFET (VDS rated 40 V, continuous ID 120 A at TC=25℃ with VGS=10 V). |
| 3 | S | passive | Source terminal of the N-channel MOSFET (VDS rated 40 V, continuous ID 120 A at TC=25℃ with VGS=10 V). |
| 4 | G | input | Gate terminal, rated for VGS of ±20 V with a gate threshold of 1.2 V min to 2.2 V max. |
| 5 | D | passive | Drain terminal of the N-channel MOSFET (VDS rated 40 V, pulsed IDM 400 A). |
| 6 | D | passive | Drain terminal of the N-channel MOSFET (VDS rated 40 V, pulsed IDM 400 A). |
| 7 | D | passive | Drain terminal of the N-channel MOSFET (VDS rated 40 V, pulsed IDM 400 A). |
| 8 | D | passive | Drain terminal of the N-channel MOSFET (VDS rated 40 V, pulsed IDM 400 A). |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | DFN5x6-8 |
| Category | Transistors/Thyristors |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `WSD40120DN56G`
- Footprint: `Package_DFN_QFN:DFN-S-8-1EP_6x5mm_P1.27mm`
- 3D model: DFN5x6-8 (KiCad packages3D, STEP)
- 3D model files: `wsd40120dn56g-etched.step` / `wsd40120dn56g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wsd40120dn56g.step` / `wsd40120dn56g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Winsok Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912794205241344) (5 pp, sha256 `428e9a4f05486b7a`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/wsd40120dn56g-datasheet.pdf)