# KA7909TU-JSM

**JSMSEMI** · MOSFETs · TO-220

KA7909TU-JSM from JSMSEMI, 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 | GND | power_in | Ground reference pin of the negative regulator, pin 1 as marked on the TO-220 (Dual Gauge) drawing. |
| 2 | Input | power_in | Negative input voltage pin (Vin), with an absolute maximum DC input voltage of -35 V. |
| 3 | Output | power_out | Regulated -9 V output (typ. -9.0 V, -8.64 V to -9.36 V at Vin=-19 V, Io=0.5 A) with output current in excess of 1.5 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | TO-220 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `KA7909TU-JSM`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `ka7909tu-jsm-etched.step` / `ka7909tu-jsm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ka7909tu-jsm.step` / `ka7909tu-jsm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](docs/ka7909tu-jsm-datasheet.pdf) (3 pp, sha256 `d615975f519e9c98`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/ka7909tu-jsm-datasheet.pdf)