# DTC144ECA

**TECH PUBLIC** · Digital Transistors · SOT-23

DTC144ECA from TECH PUBLIC, 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 (BASE) | input | Base input through built-in R1 of 47kΩ (min 32.9kΩ, max 61.1kΩ) with R2 of 47kΩ to emitter; input voltage range -10 to +40 V. |
| 2 | GND (EMITTER) | power_in | Emitter, used as the ground reference of the digital transistor. |
| 3 | OUT (COLLECTOR) | output | Collector output of the NPN digital transistor, rated 30 mA output current and 100 mA maximum collector current, supply voltage -50 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `DTC144ECA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `dtc144eca-etched.step` / `dtc144eca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dtc144eca.step` / `dtc144eca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/dtc144eca-datasheet.pdf) (5 pp, sha256 `fbfc95a21ae0409e`, 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/dtc144eca-datasheet.pdf)