# DDTA123ECA-7-F

**Diodes Incorporated** · Digital Transistors · SOT-23

DDTA123ECA-7-F from Diodes Incorporated, 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 terminal, connected to the base through the built-in input resistor R1 (2.2 kΩ nominal for DDTA123ECA); input voltage is rated +10 V to -12 V for DDTA123ECA, referenced to pin 2. |
| 2 | GND | power_in | Ground/common terminal and reference for the input voltage (pin 1 to pin 2) and supply voltage (pin 3 to pin 2) ratings. |
| 3 | OUT | output | Output terminal (collector of the PNP transistor); the supply voltage VCC from pin 3 to pin 2 is rated -50 V maximum, and output current IO is rated -100 mA maximum for DDTA123ECA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 Resistor R1 tolerance | R1 | -30 |  | 30 | % |  | 2 |
| Resistance Ratio Tolerance | R2/R1 | 0.8 | 1 | 1.2 | % |  | 2 |
| Input Voltage (off) | Vl(off) | -1.1 |  | -0.5 | V | VCC = -5V, IO = -100A | 2 |
| Input Voltage (on) | Vl(on) |  | -1.9 | -3 | V | VO = -0.3V, IO = -20mA, DDTA123ECA | 2 |
| Output Voltage (on) | VO(on) |  | -0.1 | -0.3 | V | IO/Il = -10mA/-0.5mA, DDTA123ECA | 2 |
| Input Current | Il |  |  | -3.8 | mA | VI = -5V, DDTA123ECA | 2 |
| Output Current (off) | IO(off) |  |  | -0.5 | A | VCC = -50V, VI = 0V | 2 |
| DC Current Gain | Gl | 20 |  |  |  | VO = -5V, IO = -20mA, DDTA123ECA | 2 |
| Supply Voltage | VCC |  |  | -50 | V | Pin (3) to (2) | 2 |
| Input Voltage | VIN | -12 |  | 10 | V | Pin (1) to (2), DDTA123ECA | 2 |
| Output Current | IO |  |  | -100 | mA | DDTA123ECA | 2 |
| Output Current (max) | IC |  |  | -100 | mA |  | 2 |
| Power Dissipation | PD |  |  | 200 | mW | Mounted on FR-4 PC Board with minimum recommended pad layout (Note 7) | 2 |
| Thermal Resistance, Junction to Ambient | RJA |  | 625 |  | °C/W | Mounted on FR-4 PC Board with minimum recommended pad layout (Note 7) | 2 |
| Operating and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 2 |
| Input Resistor R1 nominal | R1 |  | 2.2 |  | kΩ | DDTA123ECA, R1 (NOM); R2 = R1 per device schematic | 1 |

## CAD (KiCad official)

- Symbol: `DDTA123ECA-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ddta123eca-7-f-etched.step` / `ddta123eca-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ddta123eca-7-f.step` / `ddta123eca-7-f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590259424079351808) (5 pp, sha256 `238b94f121ac7005`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/ddta123eca-7-f-datasheet.pdf)