# BZT52C3V9

**hongjiacheng** · Zener Diodes · SOD-123

BZT52C3V9 from hongjiacheng, in a SOD-123. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Cathode | passive | Cathode terminal of the zener diode, identified by the band marking on the package body; conducts zener current in reverse bias at nominal voltage of 3.9 V and IZT of 5 mA. |
| 2 | Anode | passive | Anode terminal of the zener diode, serves as the common return path for the zener reference circuit. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | SOD-123 |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `BZT52C3V9`
- Footprint: `Diode_SMD:D_SOD-123`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `bzt52c3v9-etched.step` / `bzt52c3v9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52c3v9.step` / `bzt52c3v9.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8564879632630636544) (4 pp, sha256 `1e58426ecb363e87`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/bzt52c3v9-datasheet.pdf)