# AO3403A

**UMW** · MOSFETs · SOT-23

AO3403A from UMW, in a SOT-23. 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 | G | input | GATE terminal; the datasheet rates the gate-source voltage at VGS = ±12 V. |
| 2 | S | passive | SOURCE terminal; the device is rated VDS = -30 V with continuous drain current ID = -2.6 A at TA = 25°C. |
| 3 | D | passive | DRAIN terminal; the pulsed drain current is rated IDM = -13 A and the absolute maximum drain-source voltage is -30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## 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 | -30 |  |  | V | ID=-250µA, VGS=0V | 2 |
| Gate-Body leakage current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±12V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.6 |  |  | V | VDS=VGS, ID=-250μA | 2 |
| On state drain current | ID(ON) | -13 |  |  | A | VGS=-10V, VDS=-5V | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 88 | mΩ | VGS=-10V, ID=-2.6A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 103 | mΩ | VGS=-4.5V, ID=-2A | 2 |
| Diode Forward Voltage | VSD |  | -0.78 | -1 | V | IS=-1A, VGS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | µA | VDS=-30V, VGS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -5 | µA | VDS=-30V, VGS=0V, TJ=55°C | 2 |
| Drain-Source Voltage | VDS |  |  | -30 | V | TA=25°C unless otherwise noted | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V | TA=25°C unless otherwise noted | 1 |
| Continuous Drain Current | ID |  |  | -2.6 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | -2.2 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | -13 | A | Repetitive rating, pulse width limited by junction temperature TJ(MAX)=150°C | 1 |
| Power Dissipation | PD |  |  | 1.4 | W | TA=25°C | 1 |
| Power Dissipation | PD |  |  | 0.9 | W | TA=70°C | 1 |
| Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Maximum Junction-to-Ambient (steady state, per figure note) | RθJA |  |  | 125 | °C/W | Steady-State; RθJA=125°C/W as printed in figure 11 note; measured on 1in² FR-4, 2oz Cu, still air, TA=25°C | 5 |

## CAD (KiCad official)

- Symbol: `AO3403A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ao3403a-etched.step` / `ao3403a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao3403a.step` / `ao3403a.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/8755875706717261824) (9 pp, sha256 `785937a53e4a6182`, 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/ao3403a-datasheet.pdf)