# DTD143EG-AE3-R

**UTC Unisonic Tech** · Digital Transistors · SOT-23

DTD143EG-AE3-R from UTC Unisonic Tech, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G | power_in | Ground/emitter connection for the NPN transistor. |
| 2 | I | input | Input signal connection with built-in bias resistor network; input voltage range -10 V to +30 V absolute maximum. |
| 3 | O | output | Collector output connection; output current up to 500 mA maximum with saturation voltage 0.1 V to 0.3 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `DTD143EG-AE3-R`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `dtd143eg-ae3-r-etched.step` / `dtd143eg-ae3-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dtd143eg-ae3-r.step` / `dtd143eg-ae3-r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UTC Unisonic Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586178439375806464) (3 pp, sha256 `b466df2a79fe7c09`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/dtd143eg-ae3-r-datasheet.pdf)