# STB20NM50T4

**STMicroelectronics** · MOSFETs · TO-263

STB20NM50T4 from STMicroelectronics, in a TO-263. 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 of the N-channel MOSFET; gate-source voltage is rated at ±30 V (VGS, Table 1). |
| 2 | D | passive | Drain of the N-channel MOSFET; drain-source voltage is rated at 500 V (VDS, Table 1). |
| 3 | S | passive | Source of the N-channel MOSFET; continuous drain current is rated at 20 A at TC = 25 °C (ID, Table 1). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-263 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `STB20NM50T4`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `stb20nm50t4-etched.step` / `stb20nm50t4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stb20nm50t4.step` / `stb20nm50t4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/stb20nm50t4.pdf) (16 pp, sha256 `fb72d4900ce949a0`, retrieved 2026-10-07, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/stb20nm50t4-datasheet.pdf)