# DDTA123YUA-7-F

**Diodes Incorporated** · Digital Transistors · SOT-323

DDTA123YUA-7-F from Diodes Incorporated, in a SOT-323. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | input | Input terminal to the built-in bias network (R1); the DDTA123YUA input voltage is rated from +5 V to -12 V. |
| 2 | GND | power_in | Common ground reference (labeled GND(+) on the schematic) for the supply and input voltages; the supply voltage VCC from pin 3 to pin 2 is rated at -50 V. |
| 3 | OUT | output | Output terminal (PNP collector); the DDTA123YUA output current is rated at -100 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-323 |
| 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 Tolerance | ΔR1 | -30 |  | 30 | % |  | 2 |
| Resistance Ratio Tolerance | ΔR2/R1 | -20 |  | 20 | % |  | 2 |
| Input Off Voltage | Vl(off) | -0.3 |  |  | V | VCC = 5V, IO = 100μA | 2 |
| Input On Voltage | Vl(on) |  |  | -3 | V | VO = -0.3V, IO = -20mA | 2 |
| Output On Voltage | VO(on) |  | -0.1 | -0.3 | V | IO/Il = -10mA/-0.5mA | 2 |
| Input Current | Il |  |  | -3.8 | mA | VI = -5V | 2 |
| Output Current (off) | IO(off) |  |  | -0.5 | μA | VCC = -50V, VI = 0V | 2 |
| DC Current Gain | Gl | -33 |  |  |  | VO = -5V, IO = -10mA | 2 |
| Supply Voltage (3) to (2) | VCC | -50 |  |  | V |  | 1 |
| Input Voltage (1) to (2) | VIN | -12 |  | 5 | V |  | 1 |
| Output Current | IO | -100 |  |  | mA |  | 1 |
| Output Current, All | IC (Max) | -100 |  |  | mA |  | 2 |
| Power Dissipation | Pd |  |  | 200 | mW |  | 2 |
| Thermal Resistance, Junction to Ambient Air | RθJA |  |  | 625 | °C/W | Mounted on FR4 PC Board with recommended pad layout | 2 |
| Operating and Storage Temperature Range | Tj, TSTG | -55 |  | 150 | °C |  | 2 |
| Input Resistor R1 (NOM) | R1 |  | 2.2 |  | KΩ |  | 1 |
| Resistor R2 (NOM) | R2 |  | 10 |  | KΩ |  | 1 |

## 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: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over | 1 |

## CAD (land: KiCad; 3D: generated from the datasheet)

- Symbol: `DDTA123YUA-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323, generated on the KiCad land (body 1.25 x 2.1 mm, terminals on the pads, 0.95 mm tall, datasheet A, midpoint of min and max). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files: `ddta123yua-7-f-etched.step` / `ddta123yua-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ddta123yua-7-f.step` / `ddta123yua-7-f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/DDTA123YUA-7-F.pdf) (4 pp, sha256 `d7af473cdacc488b`, retrieved 2026-11-13, tier: manufacturer)
- **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:** land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

[Datasheet PDF](docs/ddta123yua-7-f-datasheet.pdf)