# DTA143ECA

**Changjing** · Digital Transistors · SOT-23

DTA143ECA from Changjing, 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 | IN | input | Inverter input; accepts -30 to +10 V with -3 V (on) to -0.5 V (off) logic thresholds and -1.8 mA input current at -5 V. |
| 2 | GND | power_in | Ground; common reference for supply and signal. |
| 3 | OUT | output | Inverter output; provides -0.3 V at -100 mA maximum with -0.5 µA off-state leakage at -50 V VCC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 |
|---|---|---|---|---|---|---|---|
| Input resistance | R1 | 3.29 | 4.7 | 6.11 | kΩ |  | 2 |
| Resistance ratio | R2/R1 | 0.8 | 1 | 1.2 |  |  | 2 |
| DC current gain | GI | 30 |  |  |  | VO=-5V,IO=-10mA | 2 |
| Input voltage (off) | VI(off) |  |  | -0.5 | V | VCC=-5V,IO=-100µA | 2 |
| Input voltage (on) | VI(on) |  |  | -3 | V | VO=-0.3V,IO=-20 mA | 2 |
| Output voltage (on) | VO(on) |  |  | -0.3 | V | IO/II=-10mA/-0.5mA | 2 |
| Input current | II |  |  | -1.8 | mA | VI=-5V | 2 |
| Output current (off) | IO(off) |  |  | -0.5 | μA | VCC=-50V,VI=0 | 2 |
| Supply voltage | VCC | -50 |  |  | V |  | 2 |
| Input voltage | VIN | -30 |  | 10 | V |  | 2 |
| Output current | IO | -100 |  |  | mA |  | 2 |
| Power dissipation | PD |  |  | 200 | mW | Ta=25℃, SOT-23 (CA column) | 2 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Transition frequency | fT |  | 250 |  | MHz | VO=-10V,IO=-5mA,f=100MHz | 2 |

## CAD (KiCad official)

- Symbol: `DTA143ECA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `dta143eca-etched.step` / `dta143eca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dta143eca.step` / `dta143eca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586179708594114560) (15 pp, sha256 `82b6b0ad34fcf8ac`, retrieved 2026-09-21, 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/dta143eca-datasheet.pdf)