# BZX384B5V1

**FUXINSEMI** · Zener Diodes · SOD-323

BZX384B5V1 from FUXINSEMI, in a SOD-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 | K | passive | Cathode of the zener diode (indicated by the cathode band); BZX384B5V1 has a 5.1V nominal zener voltage (5.0-5.2V at IZT = 5 mA). |
| 2 | A | passive | Anode of the zener diode; forward voltage is 0.9V at IF = 10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | SOD-323 |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZT | 5 | 5.1 | 5.2 | V | at IZT = 5 mA, pulses 20 ms | 2 |
| Test Current | IZT |  | 5 |  | mA |  | 2 |
| Dynamic Impedance | ZZT |  |  | 130 | Ω | at IZT | 2 |
| Reverse Current | IR |  |  | 2 | μA | at VR = 1.5 V | 2 |
| Forward Voltage | VF |  |  | 0.9 | V | IF = 10 mA, Ta = 25 °C | 1 |
| Power Dissipation | Ptot |  |  | 300 | mW | Ta = 25 °C | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  | 417 |  | °C/W | PCB mounted with 2.0" x 2.0" (5 x 5 cm) copper pads | 1 |

## CAD (KiCad official)

- Symbol: `BZX384B5V1`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bzx384b5v1-etched.step` / `bzx384b5v1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx384b5v1.step` / `bzx384b5v1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FUXINSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590931196241670144) (3 pp, sha256 `60146cd4b559e9e8`, retrieved 2026-10-22, tier: lcsc)
- **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/bzx384b5v1-datasheet.pdf)