# AO3404

**Guangdong Hottech** · MOSFETs · SOT-23

AO3404 from Guangdong Hottech, 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; gate-source voltage limited to ±20 V, with threshold VGS(th) of 1.2 V min, 1.8 V typ and 2.4 V max. |
| 2 | S | passive | Source; continuous drain current is 5 A at TA=25°C and the body diode forward current IS is 1.5 A max. |
| 3 | D | passive | Drain; drain-source voltage is 30 V max, continuous current is 5 A and pulsed current IDM is 20 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Guangdong Hottech |
| 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 | V(BR)DSS | 30 |  |  | V | VGS=0V, ID=250μA | 1 |
| Zero gate voltage drain current | IDSS |  |  | 1 | uA | VDS=30V, VGS=0V | 1 |
| Gate-body leakage current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 1 |
| Gate-threshold voltage | VGS(th) | 1.2 | 1.8 | 2.4 | V | VDS=VGS, ID=250μA | 1 |
| Drain-source on-resistance | RDS(ON) |  | 25.5 | 31 | mΩ | VGS=10V, ID=5A | 1 |
| Drain-source on-resistance | RDS(ON) |  | 41 | 50 | mΩ | VGS=10V, ID=5A, TJ=125°C | 1 |
| Drain-source on-resistance | RDS(ON) |  | 34 | 43 | mΩ | VGS=4.5V, ID=4A | 1 |
| Gate resistance | Rg | 1.6 | 3.25 | 4.9 | Ω | VGS=0V, VDS=0V, f=1MHz | 1 |
| Input capacitance | Ciss |  | 255 | 310 | pF |  | 1 |
| Reverse transfer capacitance | Crss |  | 35 | 50 | pF |  | 1 |
| Total gate charge | Qg |  | 5.2 | 6.3 | nC |  | 1 |
| Diode forward voltage | VSD |  | 0.76 | 1 | V | IS=1A, VGS=0V | 1 |
| Drain-source voltage | VDS |  |  | 30 | V |  | 1 |
| Gate-source voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous drain current | ID |  |  | 5 | A | TA=25°C | 1 |
| Continuous drain current | ID |  |  | 4 | A | TA=70°C | 1 |
| Pulsed drain current | IDM |  |  | 20 | A |  | 1 |
| Power dissipation | PD |  |  | 1.4 | W | TA=25°C | 1 |
| Power dissipation | PD |  |  | 0.9 | W | TA=70°C | 1 |
| Junction temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| On-State Drain Current | ID(ON) |  | 20 |  | A | VDS=5V, VGS=10V | 1 |
| Forward transconductance | gFS |  | 15 |  | S | VDS=5V, ID=5A | 1 |
| Output capacitance | Coss |  | 45 |  | pF | VDS=15V, VGS=0V, f=1MHz | 1 |
| Turn-on delay time | td(on) |  | 4.5 |  | nS | VDS=15V, VGS=10V, RGEN=3Ω, RL=3Ω | 1 |
| Turn-on rise time | tr |  | 2.5 |  | nS | VDS=15V, VGS=10V, RGEN=3Ω, RL=3Ω | 1 |
| Turn-off delay time | td(off) |  | 14.5 |  | nS | VDS=15V, VGS=10V, RGEN=3Ω, RL=3Ω | 1 |
| Turn-off fall time | tf |  | 3.5 |  | nS | VDS=15V, VGS=10V, RGEN=3Ω, RL=3Ω | 1 |
| Gate-source charge | Qgs |  | 0.85 |  | nC | VDS=15V, VGS=10V, ID=5A | 1 |
| Gate-drain charge | Qgd |  | 1.3 |  | nC | VDS=15V, VGS=10V, ID=5A | 1 |
| Diode forward current | IS |  | 1.5 |  | A |  | 1 |
| Body Diode Reverse Recovery Time | trr |  | 8.5 |  | nS | IF=5A, dI/dt=100A/us | 1 |
| Body Diode Reverse Recovery Charge | Qrr |  | 2.2 |  | nC | IF=5A, dI/dt=100A/us | 1 |
| Thermal resistance from Junction to ambient | RθJA |  | 125 |  | °C/W |  | 1 |

## CAD (KiCad official)

- Symbol: `AO3404`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ao3404-etched.step` / `ao3404-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ao3404.step` / `ao3404.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Guangdong Hottech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586188999429918720) (6 pp, sha256 `2726397eff80926f`, 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/ao3404-datasheet.pdf)