# DDC143ZU-7-F

**Diodes Incorporated** · Bipolar Transistors - BJT · SOT-363

DDC143ZU-7-F from Diodes Incorporated, in a SOT-363. 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 | COM1 | power_in | Common (emitter E1) of transistor 1, connected to ground; the 4.7kΩ/47kΩ network is referenced to it. |
| 2 | IN1 | input | Base input (B1) of transistor 1 through built-in 4.7kΩ R1, with input voltage rated -5 to +30 V. |
| 3 | OUT2 | output | Collector output (C2) of transistor 2, rated 50 V supply voltage and 100 mA output current. |
| 4 | COM2 | power_in | Common (emitter E2) of transistor 2, connected to ground. |
| 5 | IN2 | input | Base input (B2) of transistor 2 through built-in 4.7kΩ R1, with input voltage rated -5 to +30 V. |
| 6 | OUT1 | output | Collector output (C1) of transistor 1, rated 50 V supply voltage and 100 mA output current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-363 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 6 |

## 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 | % |  | 3 |
| Resistance Ratio Tolerance | R2/R1 | -20 |  | 20 | % |  | 3 |
| Output Current IO(off) | IO(off) |  |  | 0.5 | μA | VCC = 50V, VI = 0V | 3 |
| Output Voltage | VO(on) |  | 0.1 | 0.3 | V | IO/II = 5mA / 0.25mA | 3 |
| DC Current Gain | GI | 80 |  |  |  | VO = 5V, IO = 10mA | 3 |
| Input Resistor R1 nominal | R1 |  | 4.7 |  | kΩ | NOM | 1 |
| Input Resistor R2 nominal | R2 |  | 47 |  | kΩ | NOM | 1 |
| Supply Voltage | VO |  |  | 50 | V | @ TA = +25°C | 2 |
| Input Voltage | VI | -5 |  | 30 | V | @ TA = +25°C | 2 |
| Output Current | IO |  |  | 100 | mA | @ TA = +25°C | 2 |
| Peak Output Current | ICM |  |  | 100 | mA | @ TA = +25°C | 2 |
| Power Dissipation | PD |  |  | 200 | mW | Notes 6 & 7; 150mW per element must not be exceeded | 2 |
| Thermal Resistance, Junction to Ambient Air | RθJA |  |  | 625 | °C/W | Note 6 | 2 |
| Operating and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 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: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 | 1 |

## CAD (KiCad official)

- Symbol: `DDC143ZU-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `ddc143zu-7-f-etched.step` / `ddc143zu-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ddc143zu-7-f.step` / `ddc143zu-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/DDC143ZU-7-F.pdf) (8 pp, sha256 `734b84dde0b96a22`, retrieved 2026-11-07, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/ddc143zu-7-f-datasheet.pdf)