# PDTA143XU

**Nexperia** · Digital Transistors · SOT-323

PDTA143XU from Nexperia, in a SOT-323. 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 | I | input | Input (base) of the PNP transistor, connected to the built-in bias resistor R1 (4.7 kΩ), with input voltage limited to -20 V to 7 V. |
| 2 | G | power_in | GND (emitter) of the transistor, serving as the common reference terminal for the device. |
| 3 | O | output | Output (collector) of the transistor, rated for -50 V collector-emitter voltage (open base) and -100 mA output current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-323 |
| Category | Triode/MOS Tube/Transistor |
| 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 |
|---|---|---|---|---|---|---|---|
| collector-base voltage | VCBO |  |  | -50 | V | open emitter | 3 |
| collector-emitter voltage | VCEO |  |  | -50 | V | open base | 3 |
| emitter-base voltage | VEBO |  |  | -7 | V | open collector | 3 |
| input voltage | VI | -20 |  | 7 | V |  | 3 |
| output current | IO |  |  | -100 | mA |  | 3 |
| total power dissipation | Ptot |  |  | 200 | mW | Tamb ≤ 25 °C | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -65 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| thermal resistance from junction to ambient | Rth(j-a) |  |  | 625 | K/W | in free air | 4 |
| collector-base breakdown voltage | V(BR)CBO | -50 |  |  | V | IC = -100 A; IE = 0 A; Tamb = 25 °C | 5 |
| collector-emitter breakdown voltage | V(BR)CEO | -50 |  |  | V | IC = 2 mA; Tamb = 25 °C | 5 |
| collector-base cut-off current | ICBO |  |  | -100 | nA | VCB = -50 V; IE = 0 A; Tamb = 25 °C | 5 |
| collector-emitter cut-off current | ICEO |  |  | -1 | µA | VCE = -30 V; IB = 0 A; Tamb = 25 °C | 5 |
| collector-emitter cut-off current | ICEO |  |  | -5 | µA | VCE = -30 V; IB = 0 A; Tj = 150 °C | 5 |
| emitter-base cut-off current | IEBO |  |  | -600 | µA | VEB = -5 V; IC = 0 A; Tamb = 25 °C | 5 |
| DC current gain | hFE | 50 |  |  |  | VCE = -5 V; IC = -10 mA; Tamb = 25 °C | 5 |
| collector-emitter saturation voltage | VCEsat |  |  | -100 | mV | IC = -10 mA; IB = -0.5 mA; Tamb = 25 °C | 5 |
| off-state input voltage | VI(off) |  | -0.9 | -0.3 | V | VCE = -5 V; IC = -100 µA; Tamb = 25 °C | 5 |
| on-state input voltage | VI(on) | -2.5 | -1.5 |  | V | VCE = -0.3 V; IC = -20 mA; Tamb = 25 °C | 5 |
| bias resistor 1 (input) | R1 | 3.3 | 4.7 | 6.1 | kΩ |  | 5 |
| bias resistor ratio | R2/R1 | 1.7 | 2.1 | 2.6 |  | Tamb = 25 °C | 5 |
| collector capacitance | Cc |  |  | 3 | pF | VCB = -10 V; IE = 0 A; ie = 0 A; f = 1 MHz; Tamb = 25 °C | 5 |

## CAD (KiCad official)

- Symbol: `PDTA143XU`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `pdta143xu-etched.step` / `pdta143xu-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pdta143xu.step` / `pdta143xu.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/PDTA143XU.pdf) (11 pp, sha256 `6d89685bcb1c34a8`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/pdta143xu-datasheet.pdf)