# DO3400B

**DOINGTER** · MOSFETs · SOT-23

DO3400B from DOINGTER, 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; controls the channel, with VGS limited to ±12 V absolute maximum and threshold VGS(th) of 0.5 V min to 1.4 V max at ID=250μA. |
| 2 | D | passive | Drain; 30 V maximum drain-source voltage with continuous drain current of 5.8 A at TA=25℃ and 23.2 A pulsed. |
| 3 | S | passive | Source; connects to the body diode anode, which carries a continuous source current of up to 5.8 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOINGTER |
| 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 Voltage | VDS |  |  | 30 | V |  | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 5.8 | A | TA=25℃ | 1 |
| Continuous Drain Current | ID |  |  | 3.8 | A | TA=100℃ | 1 |
| Pulse Drain Current | IDM |  |  | 23.2 | A | Tested, note1 | 1 |
| Power Dissipation | PD |  |  | 1.36 | W | TA=25℃ | 1 |
| Operating and Storage Junction Temperature Range | TJ, TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 92 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 30 |  |  | V | VGS=0V,ID=250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VGS=0V, VDS=30V | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±12V, VDS=0A | 2 |
| Gate-Source Threshold Voltage | VGS(th) | 0.5 | 0.9 | 1.4 | V | VGS=VDS, ID=250μA | 2 |
| Drain-Source On-Resistance | RDS(ON) |  | 21 | 26 | mΩ | VGS=10V,ID=4.2A | 2 |
| Drain-Source On-Resistance | RDS(ON) |  | 23 | 30 | mΩ | VGS=4.5V,ID=4A | 2 |
| Drain-Source On-Resistance | RDS(ON) |  | 32 | 45 | mΩ | VGS=2.5V,ID=1A | 2 |
| Continuous Source Current | IS |  |  | 5.8 | A |  | 2 |
| Pulsed Source Current | ISM |  |  | 23.2 | A |  | 2 |
| Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V , IS=5.8A | 2 |

## CAD (KiCad official)

- Symbol: `DO3400B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `do3400b-etched.step` / `do3400b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `do3400b.step` / `do3400b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOINGTER datasheet](docs/do3400b-datasheet.pdf) (6 pp, sha256 `a0c013ab0e703c7d`, retrieved 2026-10-20, 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/do3400b-datasheet.pdf)