# DTC124EUA

**TECH PUBLIC** · Digital Transistors · SOT-323

DTC124EUA from TECH PUBLIC, in a SOT-323. 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 (BASE) | input | Base input through built-in 22kΩ series resistor R1 (with 22kΩ R2 to GND); input voltage rated -10 to +40 V, VI(OFF) min 0.5 V, VI(ON) max 3 V. |
| 2 | GND (EMITTER) | power_in | Emitter/ground terminal of the NPN digital transistor, also the return for the R2 22kΩ base-emitter resistor. |
| 3 | OUT (COLLECTOR) | output | Collector output of the digital transistor, rated 50 V supply (VCC), 30 mA output current (IO) and 100 mA max collector current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `DTC124EUA`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `dtc124eua-etched.step` / `dtc124eua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dtc124eua.step` / `dtc124eua.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/dtc124eua-datasheet.pdf) (5 pp, sha256 `8ccf1465d5b3c910`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/dtc124eua-datasheet.pdf)