# WSR20N20

**Winsok Semicon** · MOSFETs · TO-220

WSR20N20 from Winsok Semicon, in a TO-220. 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 is rated at ±20 V maximum, with a threshold of 2.0 V min to 4.0 V max at ID=250uA. |
| 2 | D | passive | Drain, connected to the mounting tab; drain-source voltage is rated at 200 V and continuous drain current at 20 A (TC=25℃). |
| 3 | S | passive | Source; continuous body-diode source current is 18 A and pulsed source current is 72 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | TO-220 |
| Category | Triode/MOS Tube/Transistor |
| 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 |  |  | 200 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 20 | A | TC=25℃, VGS @ 10V | 1 |
| Continuous Drain Current | ID |  |  | 11 | A | TC=100℃, VGS @ 10V | 1 |
| Pulsed Drain Current | IDM |  |  | 72 | A |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 340 | mJ |  | 1 |
| Total Power Dissipation | PD |  |  | 104 | W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 175 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 175 | ℃ |  | 1 |
| Thermal Resistance Junction-ambient | RθJA |  |  | 62.5 | ℃/W |  | 1 |
| Thermal Resistance Junction-Case | RθJC |  |  | 1.2 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 200 |  |  | V | VGS=0V, ID=250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 120 | 150 | mΩ | VGS=10V, ID=9A | 2 |
| Gate Threshold Voltage | VGS(th) | 2 | 3 | 4 | V | VGS=VDS, ID=250uA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=160V, VGS=0V, TJ=25℃ | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 5 | uA | VDS=160V, VGS=0V, TJ=55℃ | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±25V, VDS=0V | 2 |
| Continuous Source Current | IS |  |  | 18 | A | VG=VD=0V, Force Current | 2 |
| Pulsed Source Current | ISM |  |  | 72 | A | VG=VD=0V, Force Current | 2 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V, IS=18A, TJ=25℃ | 2 |
| BVDSS Temperature Coefficient | △BVDSS/△TJ |  | 0.098 |  | V/℃ | Reference to 25℃, ID=1mA | 2 |
| VGS(th) Temperature Coefficient | △VGS(th) |  | -4.57 |  | mV/℃ |  | 2 |
| Forward Transconductance | gfs |  | 32 |  | S | VDS=5V, ID=9A | 2 |
| Input Capacitance | Ciss |  | 1318 |  | pF | VDS=30V, VGS=0V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 180 |  | pF | VDS=30V, VGS=0V, f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 75 |  | pF | VDS=30V, VGS=0V, f=1MHz | 2 |
| Reverse Recovery Time | trr |  | 230 |  | nS | IF=18A, dI/dt=100A/µs, TJ=25℃ | 2 |
| Reverse Recovery Charge | Qrr |  | 1800 |  | nC | IF=18A, dI/dt=100A/µs, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `WSR20N20`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `wsr20n20-etched.step` / `wsr20n20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wsr20n20.step` / `wsr20n20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Winsok Semicon datasheet](docs/wsr20n20-datasheet.pdf) (6 pp, sha256 `43d1d5fad5ffc63e`, retrieved 2026-10-30, 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/wsr20n20-datasheet.pdf)