# AO4266-MS

**MSKSEMI** · MOSFETs · SOP-8

AO4266-MS from MSKSEMI, 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 of the N-channel MOSFET, one of three source pins on the SOP-8 outline. |
| 2 | S | passive | Source of the N-channel MOSFET, one of three source pins on the SOP-8 outline. |
| 3 | S | passive | Source of the N-channel MOSFET, one of three source pins on the SOP-8 outline. |
| 4 | G | input | Gate of the N-channel MOSFET, with a maximum gate-source voltage of ±20 V. |
| 5 | D | passive | Drain of the N-channel MOSFET, rated 60 V drain-source and 10 A continuous, tied to the other drain pins. |
| 6 | D | passive | Drain of the N-channel MOSFET, rated 60 V drain-source and 10 A continuous, tied to the other drain pins. |
| 7 | D | passive | Drain of the N-channel MOSFET, rated 60 V drain-source and 10 A continuous, tied to the other drain pins. |
| 8 | D | passive | Drain of the N-channel MOSFET, rated 60 V drain-source and 10 A continuous, tied to the other drain pins. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 | VGS=0V ID=250μA | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VDS=60V,VGS=0V | 3 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V,VDS=0V | 3 |
| Gate Threshold Voltage | VGS(th) | 0.9 | 1.3 | 1.8 | V | VDS=VGS ,ID=250μA | 3 |
| Drain-Source On-State Resistance | RDS(ON) |  | 10 | 13 | mΩ | VGS=10V, ID=10A | 3 |
| Drain-Source On-State Resistance | RDS(ON) |  | 11.5 | 15 | mΩ | VGS=4.5V, ID=5A | 3 |
| Forward Transconductance | gFS | 40 |  |  | S | VDS=5V,ID=12A | 3 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V,IS=10A | 3 |
| Diode Forward Current | IS |  |  | 10 | A |  | 3 |
| Drain-Source Voltage | VDS |  |  | 60 | V | TC=25℃ | 2 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V | TC=25℃ | 2 |
| Drain Current-Continuous | ID |  |  | 10 | A | TC=25℃ | 2 |
| Drain Current-Continuous (TC=100℃) | ID (100℃) |  |  | 8.5 | A | TC=100℃ | 2 |
| Pulsed Drain Current | IDM |  |  | 30 | A |  | 2 |
| Maximum Power Dissipation | PD |  |  | 3 | W | TC=25℃ | 2 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | ℃ |  | 2 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  |  | 42 | ℃/W | Note 2: mounted on 1in2 FR-4 board with 2oz. Copper, still air, TA=25°C | 2 |

## CAD (KiCad official)

- Symbol: `AO4266-MS`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ao4266-ms-etched.step` / `ao4266-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao4266-ms.step` / `ao4266-ms.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555434940950953984) (8 pp, sha256 `9ad0f18ff8424e1d`, 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/ao4266-ms-datasheet.pdf)