# STN4NF20L-VB

**VBsemi Elec** · MOSFETs · SOT-223

STN4NF20L-VB from VBsemi Elec, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G | input | Gate. Insulated-gate control terminal for the N-channel MOSFET. Absolute maximum VGS = ±20 V; VGS(th) = 2.0-4.0 V at VDS = VGS, ID = 250 μA. |
| 2 | S | passive | Source. Reference terminal for gate drive and current return for the N-channel channel. Also the anode of the intrinsic body diode. |
| 3 | D | passive | Drain. Power terminal for the N-channel MOSFET; VDS(max) = 200 V, continuous ID = 1.0 A at TC = 25 °C, RDS(on) = 1.2 Ω typ at VGS = 10 V. Cathode of the intrinsic body diode. |
| 4 | D | passive | Drain (tab). Large heat-spreading tab on SOT-223 electrically tied to the drain; used as the primary thermal path to the PCB copper pour. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | VBsemi Elec |
| Package | SOT-223 |
| Category | Transistors/Thyristors |
| Pins | 4 |

## Ordering variants

Same part, different packaging or reel option.

- `STN4NF20L-VB`

## CAD (KiCad official)

- Symbol: `STN4NF20L-VB`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `stn4nf20l-vb-etched.step` / `stn4nf20l-vb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stn4nf20l-vb.step` / `stn4nf20l-vb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [VBsemi Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602998055642296320) (None pp, sha256 `299f417520f37136`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/stn4nf20l-vb-datasheet.pdf)