# PDTB123TT

**Nexperia** · Digital Transistors · SOT-23

PDTB123TT from Nexperia, 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 | input (base) | input | Base input of the resistor-equipped transistor, with input voltage limited to +5 V (positive) and −12 V (negative) per the limiting values. |
| 2 | GND (emitter) | power_in | Emitter, labelled GND in the pinning table, with emitter-base voltage limited to −5 V (VEBO). |
| 3 | output (collector) | output | Collector output, with output current limited to −500 mA (IO) and collector-emitter voltage limited to −50 V (VCEO). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-base voltage | VCBO |  |  | -50 | V | open emitter | 4 |
| Collector-emitter voltage | VCEO |  |  | -50 | V | open base | 4 |
| Emitter-base voltage | VEBO |  |  | -5 | V | open collector | 4 |
| Input voltage | VI |  |  | 5 | V | positive | 4 |
| Input voltage | VI |  |  | -12 | V | negative | 4 |
| Output current | IO |  |  | -500 | mA |  | 4 |
| Total power dissipation | Ptot |  |  | 250 | mW | Tamb ≤ 25 °C | 4 |
| Junction temperature | Tj |  |  | 150 | °C |  | 4 |
| Ambient temperature | Tamb | -65 |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 500 | K/W | in free air | 4 |
| Collector-base cut-off current | ICBO |  |  | -100 | nA | VCB = −40 V; IE = 0 A | 5 |
| Collector-emitter cut-off current | ICEO |  |  | -0.5 | μA | VCE = −50 V; IB = 0 A | 5 |
| Emitter-base cut-off current | IEBO |  |  | -100 | nA | VEB = −5 V; IC = 0 A | 5 |
| DC current gain | hFE | 100 | 250 |  | - | VCE = −5 V; IC = −50 mA | 5 |
| Collector-emitter saturation voltage | VCEsat |  |  | -0.3 | V | IC = −50 mA; IB = −2.5 mA | 5 |
| Bias resistor 1 (input) | R1 | 1.54 | 2.2 | 2.86 | kΩ |  | 5 |

## CAD (KiCad official)

- Symbol: `PDTB123TT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `pdtb123tt-etched.step` / `pdtb123tt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pdtb123tt.step` / `pdtb123tt.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/PDTB123TT.pdf) (11 pp, sha256 `83da0195cf6d28de`, retrieved 2026-10-17, 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:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/pdtb123tt-datasheet.pdf)