# AO4419

**Alpha Omega Semicon** · MOSFETs · SOIC-8

AO4419 from Alpha Omega Semicon, in a SOIC-8. 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 | S | passive | Source of the P-channel MOSFET; the datasheet drawing shows pins 1-3 as S, with the device rated for VDS of -30V. |
| 2 | S | passive | Source of the P-channel MOSFET, tied to the other source pins; continuous drain current is -9.7A at TA=25°C. |
| 3 | S | passive | Source of the P-channel MOSFET, tied to the other source pins; pulsed drain current is -70A. |
| 4 | G | input | Gate of the P-channel MOSFET; maximum gate-source voltage is ±20V, with gate threshold of -1.5V to -2.5V. |
| 5 | D | passive | Drain of the P-channel MOSFET, tied to the other drain pins; RDS(ON) is below 20mΩ at VGS=-10V. |
| 6 | D | passive | Drain of the P-channel MOSFET, tied to the other drain pins; drain-source voltage is -30V maximum. |
| 7 | D | passive | Drain of the P-channel MOSFET, tied to the other drain pins; RDS(ON) is below 35mΩ at VGS=-4.5V. |
| 8 | D | passive | Drain of the P-channel MOSFET, tied to the other drain pins; body-diode continuous current is -4A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Alpha Omega Semicon |
| Package | SOIC-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `AO4419`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ao4419-etched.step` / `ao4419-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao4419.step` / `ao4419.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Alpha Omega Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884137062752256) (6 pp, sha256 `1bc7da9e15bbc90a`, retrieved 2026-10-09, 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/ao4419-datasheet.pdf)