# AO4441

**UMW** · MOSFETs · SOP-8

AO4441 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; pins 1, 2 and 3 are all SOURCE and the device is rated for VDS = -60V with a gate-source voltage of ±20V. |
| 2 | S | passive | SOURCE terminal; pins 1, 2 and 3 are all SOURCE and the device is rated for VDS = -60V with a gate-source voltage of ±20V. |
| 3 | S | passive | SOURCE terminal; pins 1, 2 and 3 are all SOURCE and the device is rated for VDS = -60V with a gate-source voltage of ±20V. |
| 4 | G | input | GATE terminal; gate-source voltage is limited to ±20V and the gate threshold voltage VGS(th) is specified between -1V and -3V. |
| 5 | D | passive | DRAIN terminal; pins 5 to 8 are all DRAIN, rated for VDS = -60V and continuous drain current -4A at TA=25°C (-3.1A at TA=70°C). |
| 6 | D | passive | DRAIN terminal; pins 5 to 8 are all DRAIN, rated for VDS = -60V and continuous drain current -4A at TA=25°C (-3.1A at TA=70°C). |
| 7 | D | passive | DRAIN terminal; pins 5 to 8 are all DRAIN, rated for VDS = -60V and continuous drain current -4A at TA=25°C (-3.1A at TA=70°C). |
| 8 | D | passive | DRAIN terminal; pins 5 to 8 are all DRAIN, rated for VDS = -60V and continuous drain current -4A at TA=25°C (-3.1A at TA=70°C). |

## 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 | BVDSS | -60 |  |  | V | ID=-250µA, VGS=0V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | µA | VDS=-48V, VGS=0V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -5 | µA | VDS=-48V, VGS=0V, TJ=55°C | 3 |
| Gate-Body leakage current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 3 |
| Gate Threshold Voltage | VGS(th) | -1 | -2.1 | -3 | V | VDS=VGS, ID=-250μA | 3 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 80 | 100 | mΩ | VGS=-10V, ID=-4A | 3 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 102 | 130 | mΩ | VGS=-4.5V, ID=-3A | 3 |
| Diode Forward Voltage | VSD |  | -0.77 | -1 | V | IS=-1A, VGS=0V | 3 |
| Maximum Body-Diode Continuous Current | IS |  |  | -4 | A |  | 3 |
| Input Capacitance | Ciss |  | 930 | 1120 | pF | VGS=0V, VDS=-30V, f=1MHz | 3 |
| Gate resistance | Rg |  | 7.2 | 9 | Ω | f=1MHz | 3 |
| Total Gate Charge (10V) | Qg(10V) |  | 16 | 20 | nC | VGS=-10V, VDS=-30V, ID=-4A | 3 |
| Total Gate Charge (4.5V) | Qg(4.5V) |  | 8 | 10 | nC |  | 3 |
| Drain-Source Voltage | VDS |  |  | -60 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -4 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | -3.1 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | -20 | A |  | 1 |
| Power Dissipation | PD |  |  | 3.1 | W | TA=25°C | 1 |
| Power Dissipation | PD |  |  | 2 | W | TA=70°C | 1 |
| Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |
| Maximum Junction-to-Ambient (t ≤ 10s) | RθJA |  | 24 | 40 | °C/W | t ≤ 10s | 2 |
| Maximum Junction-to-Ambient (Steady-State) | RθJA |  | 54 | 75 | °C/W | Steady-State | 2 |
| Maximum Junction-to-Lead | RθJL |  | 21 | 30 | °C/W | Steady-State | 2 |

## CAD (KiCad official)

- Symbol: `AO4441`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ao4441-etched.step` / `ao4441-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao4441.step` / `ao4441.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/8755875699444203520) (10 pp, sha256 `2c5de7f22797a9e5`, 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/ao4441-datasheet.pdf)