# WST6004

**Winsok Semicon** · MOSFETs · SOT-523

WST6004 from Winsok Semicon, in a SOT-523. 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 ±8 V, with threshold of 0.35 V to 1.0 V at ID=250uA. |
| 2 | S | passive | Source; continuous source (body diode) current is 100 mA max. |
| 3 | D | passive | Drain; drain-source voltage is 20 V max and continuous drain current is 600 mA at TA=25℃. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | SOT-523 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS |  |  | 20 | V |  | 1 |
| Gate-Source Voltage | VGS | -8 |  | 8 | V |  | 1 |
| Continuous Drain Current | ID@TA=25℃ |  |  | 600 | mA | VGS @ 10V, TA=25℃ (Note 1) | 1 |
| Continuous Drain Current | ID@TA=70℃ |  |  | 300 | mA | VGS @ 10V, TA=70℃ (Note 1) | 1 |
| Pulsed Drain Current | IDM |  |  | 3 | A | Note 2: pulse width ≤300us, duty cycle ≤2% | 1 |
| Total Power Dissipation | PD@TA=25℃ |  |  | 0.175 | W | TA=25℃ (Note 3: limited by 150℃ junction temperature) | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  |  | 625 | ℃/W | Note 1: surface mounted on 1 inch² FR-4 board, 2OZ copper | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 20 |  |  | V | VGS=0V, ID=250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 140 | 450 | mΩ | VGS=4.5V, ID=0.6A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 180 | 765 | mΩ | VGS=2.5V, ID=0.5A | 2 |
| Gate Threshold Voltage | VGS(th) | 0.35 |  | 1 | V | VGS=VDS, ID=250uA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=16V, VGS=0V, TJ=25℃ | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 5 | uA | VDS=16V, VGS=0V, TJ=55℃ | 2 |
| Gate-Source Leakage Current | IGSS | -10 |  | 10 | uA | VGS=±8V, VDS=0V | 2 |
| Input Capacitance | Ciss |  | 130 | 220 | pF | VDS=15V, VGS=0V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 20 | 36 | pF | VDS=15V, VGS=0V, f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 16 | 28 | pF | VDS=15V, VGS=0V, f=1MHz | 2 |
| Continuous Source Current | IS |  |  | 100 | mA | VG=VD=0V, Force Current (Notes 1, 4) | 2 |
| Pulsed Source Current | ISM |  |  | 0.5 | A | Notes 2, 4 | 2 |
| Diode Forward Voltage | VSD |  |  | 1 | V | VGS=0V, IS=0.2A, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `WST6004`
- Footprint: `Package_TO_SOT_SMD:SOT-523`
- 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `wst6004-etched.step` / `wst6004-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wst6004.step` / `wst6004.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/8590902925977858048) (5 pp, sha256 `3842294995dc96e1`, 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/wst6004-datasheet.pdf)