# BF824

**Nexperia** · Bipolar (BJT) · SOT-23

BF824 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 | base | input | Base terminal of the BF824 PNP medium frequency transistor, the control electrode for the device (PNP, max. 25 mA collector current, max. 30 V collector-emitter voltage per the limiting values). |
| 2 | emitter | passive | Emitter terminal of the BF824 PNP transistor; the emitter-base voltage is limited to -4 V (VEBO) with the collector open. |
| 3 | collector | passive | Collector terminal of the BF824 PNP transistor; DC collector current is limited to -25 mA (IC) and total power dissipation to 250 mW at Tamb ≤ 25 °C on an FR4 board. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BF824`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bf824-etched.step` / `bf824-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bf824.step` / `bf824.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/BF824.pdf) (7 pp, sha256 `3b5a17e1408262d9`, retrieved 2026-10-09, 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/bf824-datasheet.pdf)