# CMU9N20

**Cmos** · MOSFETs · TO-251

CMU9N20 from Cmos, in a TO-251. 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, with a maximum gate-source voltage of ±20 V and a gate threshold voltage of 2 V min to 4 V max at VGS=VDS, ID=250uA. |
| 2 | D | passive | Drain, rated for a 200 V drain-source voltage, 9 A continuous current at TC=25℃ and 32 A pulsed current. |
| 3 | S | passive | Source, carrying up to 9 A continuous drain current at TC=25℃ and a 9 A continuous body-diode source current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Cmos |
| Package | TO-251 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `CMU9N20`
- Footprint: `Package_TO_SOT_THT:TO-251-3_Vertical`
- 3D model: TO-251 (KiCad packages3D, STEP)
- 3D model files: `cmu9n20-etched.step` / `cmu9n20-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmu9n20.step` / `cmu9n20.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Cmos datasheet](docs/cmu9n20-datasheet.pdf) (2 pp, sha256 `267b64a6dac41b0b`, retrieved 2026-10-27, 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/cmu9n20-datasheet.pdf)