# DDTA123JCA-7-F

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

DDTA123JCA-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 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 pin; the DDTA123JCA input voltage is rated +5 to -12 V (pin 1 to pin 2), and the input current is -3.6 mA max at VI = -5 V. |
| 2 | GND | power_in | Ground reference pin (marked GND(+) on the pin configuration diagram); all input and supply voltage limits are referenced to this pin. |
| 3 | OUT | output | Output pin (collector, with the internal bias resistors built in); the supply voltage VCC from pin 3 to pin 2 is rated -50 V max and the output current IO is -100 mA max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Transistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC |  |  | -50 | V |  | 1 |
| Input Voltage | VIN | -12 |  | 5 | V | (1) to (2) | 1 |
| Output Current | IO |  |  | -100 | mA |  | 1 |
| Output Current All IC (Max) |  |  |  | -100 | mA |  | 1 |
| 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 (Note 3) | 2 |
| Operating and Storage Temperature Range | Tj, TSTG | -55 |  | 150 | °C |  | 2 |
| Input Voltage (off) | Vl(off) | -0.5 |  |  | V | VCC = 5V, IO = 100μA | 2 |
| Input Voltage (on) | Vl(on) |  |  | -1.1 | V | VO = -0.3V, IO = -5mA | 2 |
| Output Voltage | VO(on) |  | -0.1 | -0.3 | V | IO/Il = -5mA/-0.25mA | 2 |
| Input Current | Il |  |  | -3.6 | mA | VI = -5V | 2 |
| Output Current (off) | IO(off) |  |  | -0.5 | μA | VCC = -50V, VI = 0V | 2 |
| DC Current Gain | Gl | -80 |  |  |  | VO = -5V, IO = -10mA | 2 |
| Input Resistor Tolerance | ΔR1 | -30 |  | 30 | % |  | 2 |
| Resistance Ratio Tolerance | ΔR2/R1 | -20 |  | 20 | % |  | 2 |

## 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 Alloy | 1 |

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

- Symbol: `DDTA123JCA-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.0015 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: `ddta123jca-7-f-etched.step` / `ddta123jca-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ddta123jca-7-f.step` / `ddta123jca-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/DDTA123JCA-7-F.pdf) (4 pp, sha256 `77b10576bfb16755`, 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/ddta123jca-7-f-datasheet.pdf)