# DTA123ECA

**Yangzhou Yangjie Elec Tech** · Digital Transistors · SOT-23

DTA123ECA from Yangzhou Yangjie Elec Tech, 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 | IN | input | Input pin connected through built-in bias resistor R1 (1.5 to 2.9 kΩ, 2.2 kΩ typ) to the base, with input voltage rated -10 V to +5 V. |
| 2 | GND | power_in | Ground/emitter pin shown as GND(+) in the equivalent circuit, connected to the emitter and to R2, with R2/R1 ratio of 0.8 to 1.2. |
| 3 | OUT | output | Output pin connected to the PNP collector, with a maximum output current of -100 mA and a supply voltage rating of -50 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-23 |
| Category | Transistors |
| Pins | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `DTA123ECA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `dta123eca-etched.step` / `dta123eca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dta123eca.step` / `dta123eca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](docs/dta123eca-datasheet.pdf) (5 pp, sha256 `f5069e630ce9742f`, retrieved 2026-10-27, 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/dta123eca-datasheet.pdf)