# WST6225

**Winsok Semicon** · MOSFETs · SOT-23-3L

WST6225 from Winsok Semicon, in a SOT-23-3L. 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; the datasheet gives VGS max ±12 V, with threshold -0.3 to -1.0 V at ID=-250uA. |
| 2 | S | passive | Source; continuous drain current is -5.1 A at VGS=-4.5V, TC=25℃, and source current IS is up to -4.8 A. |
| 3 | D | passive | Drain; VDS max is -20 V and pulsed drain current IDM is -15 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | SOT-23-3L |
| 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 | -12 |  | 12 | V |  | 1 |
| Continuous Drain Current | ID@TC=25℃ | -5.1 |  |  | A | TC=25℃, VGS @ -4.5V | 1 |
| Continuous Drain Current | ID@TC=70℃ | -3.9 |  |  | A | TC=70℃, VGS @ -4.5V | 1 |
| Pulsed Drain Current | IDM | -15 |  |  | A |  | 1 |
| Total Power Dissipation | PD@TA=25℃ |  |  | 1 | W | TA=25℃ | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  |  | 125 | ℃/W | Note 1: surface mounted on 1 inch² FR-4 board with 2OZ copper | 1 |
| Thermal Resistance Junction-Case | RθJC |  |  | 80 | ℃/W | Note 1: surface mounted on 1 inch² FR-4 board with 2OZ copper | 1 |
| Drain-Source Breakdown Voltage | BVDSS | -20 |  |  | V | VGS=0V, ID=-250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 42 | 55 | mΩ | VGS=-4.5V, ID=-3A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 56 | 70 | mΩ | VGS=-2.5V, ID=-2A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 73 | 85 | mΩ | VGS=-1.8V, ID=-1A | 2 |
| Gate Threshold Voltage | VGS(th) | -0.3 | -0.5 | -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 | -100 |  | 100 | nA | VGS=±8V, VDS=0V | 2 |
| Total Gate Charge (-4.5V) | Qg |  | 12.1 | 16.9 | nC | VDS=-15V, VGS=-4.5V, ID=-3A | 2 |
| Gate-Source Charge | Qgs |  | 1.5 | 2.1 | nC | VDS=-15V, VGS=-4.5V, ID=-3A | 2 |
| Gate-Drain Charge | Qgd |  | 3.1 | 4.3 | nC | VDS=-15V, VGS=-4.5V, ID=-3A | 2 |
| Turn-On Delay Time | Td(on) |  | 4.4 | 8.8 | ns | VDD=-10V, VGS=-4.5V, RG=3.3Ω, ID=-3A | 2 |
| Rise Time | Tr |  | 45 | 81 | ns | VDD=-10V, VGS=-4.5V, RG=3.3Ω, ID=-3A | 2 |
| Turn-Off Delay Time | Td(off) |  | 48.4 | 97 | ns | VDD=-10V, VGS=-4.5V, RG=3.3Ω, ID=-3A | 2 |
| Fall Time | Tf |  | 30.4 | 60.8 | ns | VDD=-10V, VGS=-4.5V, RG=3.3Ω, ID=-3A | 2 |
| Input Capacitance | Ciss |  | 938 | 1313 | pF | VDS=-15V, VGS=0V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 108 | 151 | pF | VDS=-15V, VGS=0V, f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 96 | 134 | pF | VDS=-15V, VGS=0V, f=1MHz | 2 |
| Continuous Source Current | IS |  |  | -4.8 | A | VG=VD=0V, Force Current | 2 |
| Pulsed Source Current | ISM |  |  | -15 | A |  | 2 |
| Diode Forward Voltage | VSD |  |  | -1 | V | VGS=0V, IS=-1A, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `WST6225`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `wst6225-etched.step` / `wst6225-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wst6225.step` / `wst6225.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/8586187740740800512) (5 pp, sha256 `6851cd87b1a932a7`, retrieved 2026-10-10, 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/wst6225-datasheet.pdf)