# AO4404

**UMW** · MOSFETs · SOP-8

AO4404 from UMW, in a SOP-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 terminal of the N-channel MOSFET, grouped with pins 2 and 3 as the source connection; the device is rated VDS 20 V with VGS ±16 V. |
| 2 | S | passive | Source terminal of the N-channel MOSFET, grouped with pins 1 and 3 as the source connection; the device is rated VDS 20 V with VGS ±16 V. |
| 3 | S | passive | Source terminal of the N-channel MOSFET, grouped with pins 1 and 2 as the source connection; the device is rated VDS 20 V with VGS ±16 V. |
| 4 | G | input | Gate terminal of the N-channel MOSFET; the gate-source voltage is rated ±16 V and the datasheet specifies operation with gate voltages as low as 4.5 V. |
| 5 | D | passive | Drain terminal of the N-channel MOSFET, grouped with pins 6, 7 and 8 as the drain connection; the device is rated VDS 20 V and ID 12 A. |
| 6 | D | passive | Drain terminal of the N-channel MOSFET, grouped with pins 5, 7 and 8 as the drain connection; the device is rated VDS 20 V and ID 12 A. |
| 7 | D | passive | Drain terminal of the N-channel MOSFET, grouped with pins 5, 6 and 8 as the drain connection; the device is rated VDS 20 V and ID 12 A. |
| 8 | D | passive | Drain terminal of the N-channel MOSFET, grouped with pins 5, 6 and 7 as the drain connection; the device is rated VDS 20 V and ID 12 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Breakdown Voltage | VDS | 20 |  |  | V | VGS=0V, ID=250μA | 3 |
| Gate-Source Threshold Voltage | VGS(th) | 1 |  | 3 | V | VDS=VGS, ID=250μA | 3 |
| Gate-Source Leakage | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±16V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | µA | VDS=20V, VGS=0V | 3 |
| Zero Gate Voltage Drain Current (TJ=55°C) | IDSS |  |  | 10 | µA | VDS=20V, VGS=0V, TJ=55°C | 3 |
| On-State Drain Current | ID(ON) | 50 |  |  | A | VDS≥5V, VGS=10V | 3 |
| Drain-Source On-State Resistance | RDS(ON) |  |  | 20 | mΩ | VGS=10V | 1 |
| Body Diode Voltage | VSD |  |  | 1.2 | V | IS=9A | 4 |
| Drain-Source Voltage | VDS |  |  | 20 | V |  | 1 |
| Gate-Source Voltage | VGS | -16 |  | 16 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 12 | A | TC=25°C, TJ=150°C | 1 |
| Continuous Drain Current | ID |  |  | 11 | A | TC=70°C, TJ=150°C | 1 |
| Continuous Drain Current | ID |  |  | 10 | A | TA=25°C (footnotes b,c) | 1 |
| Continuous Drain Current | ID |  |  | 8 | A | TA=70°C (footnotes b,c) | 1 |
| Pulsed Drain Current | IDM |  |  | 47 | A |  | 1 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Maximum Junction-to-Ambient | RthJA |  | 39 | 55 | °C/W | t ≤ 10s | 2 |
| Maximum Junction-to-Foot (Drain) | RthJF |  | 25 | 29 | °C/W |  | 2 |

## CAD (KiCad official)

- Symbol: `AO4404`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ao4404-etched.step` / `ao4404-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao4404.step` / `ao4404.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755875107669716992) (11 pp, sha256 `51344edb5835bf58`, retrieved 2026-10-09, tier: lcsc)
- **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/ao4404-datasheet.pdf)