# APT40DQ120BG

**Microchip Tech** · Fast Recovery / High Efficiency Diodes · TO-247

APT40DQ120BG from Microchip Tech, in a TO-247. 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 | K | passive | Cathode of the rectifier diode, also connected to the back of the case (mounting tab), with a maximum DC reverse voltage of 1200 V. |
| 2 | A | passive | Anode of the rectifier diode, with a maximum average forward current of 40 A (TC = 112 °C, duty cycle = 0.5). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TO-247 |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `APT40DQ120BG`
- Footprint: `Package_TO_SOT_THT:TO-247-2_Vertical`
- 3D model: TO-247 (KiCad packages3D, STEP)
- 3D model files: `apt40dq120bg-etched.step` / `apt40dq120bg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `apt40dq120bg.step` / `apt40dq120bg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/apt40dq120bg-datasheet.pdf) (11 pp, sha256 `cb3c5e843747fe25`, 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/apt40dq120bg-datasheet.pdf)