# BZX84J-B9V1

**Nexperia** · Zener Diodes · SOD-323F

BZX84J-B9V1 from Nexperia, in a SOD-323F. 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 | cathode | passive | Cathode of the Zener diode, identified by the marking bar on the package; the datasheet gives a forward current limit of 250 mA (IF, Table 5) for the device. |
| 2 | anode | passive | Anode of the Zener diode; the device has a total power dissipation limit of 550 mW at Tamb ≤ 25 °C (Ptot, Table 5) and a junction temperature limit of 150 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-323F |
| 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 |
|---|---|---|---|---|---|---|---|
| Working voltage (Zener voltage), minimum | VZ | 8.92 |  |  | V | IZ = 5 mA; Tj = 25 °C unless otherwise specified | 4 |
| Working voltage (Zener voltage), maximum | VZ |  |  | 9.28 | V | IZ = 5 mA; Tj = 25 °C unless otherwise specified | 4 |
| Differential resistance, maximum | rdif |  |  | 100 | Ω |  | 4 |
| Reverse current, maximum (first IR column) | IR |  |  | 10 | µA |  | 4 |
| Reverse current, maximum (second IR column) | IR |  |  | 0.5 | µA |  | 4 |
| Temperature coefficient, minimum | SZ | 3.8 |  |  | mV/K | IZ = 5 mA | 4 |
| Temperature coefficient, maximum | SZ |  |  | 7 | mV/K | IZ = 5 mA | 4 |
| Diode capacitance, maximum | Cd |  |  | 120 | pF | f = 1 MHz; VR = 0 V | 4 |
| Non-repetitive peak reverse current, maximum | IZSM |  |  | 3 | A | tp = 100 µs; square wave; Tj = 25 °C prior to surge | 4 |
| Forward current, maximum | IF |  |  | 250 | mA |  | 3 |
| Non-repetitive peak reverse power dissipation, maximum | PZSM |  |  | 40 | W | tp = 100 µs; square wave; Tj = 25 °C prior to surge | 3 |
| Total power dissipation, maximum | Ptot |  |  | 550 | mW | Tamb ≤ 25 °C; device mounted on FR4 PCB, mounting pad for cathode 1 cm² | 3 |
| Junction temperature, maximum | Tj |  |  | 150 | °C |  | 3 |
| Ambient temperature range | Tamb | -55 |  | 150 | °C |  | 3 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 3 |
| Forward voltage, maximum | VF |  |  | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 µs, δ ≤ 0.02 | 3 |
| Forward voltage, maximum | VF |  |  | 1.1 | V | IF = 100 mA; pulse test tp ≤ 300 µs, δ ≤ 0.02 | 3 |
| Thermal resistance, junction to ambient, maximum | Rth(j-a) |  |  | 230 | K/W | in free air; device mounted on FR4 PCB, mounting pad for cathode 1 cm² | 3 |
| Thermal resistance, junction to solder point, maximum | Rth(j-sp) |  |  | 55 | K/W | soldering point of cathode tab | 3 |

## CAD (KiCad official)

- Symbol: `BZX84J-B9V1`
- Footprint: `Diode_SMD:D_SOD-323F`
- 3D model: SOD-323F (KiCad packages3D, STEP)
- 3D model files: `bzx84j-b9v1-etched.step` / `bzx84j-b9v1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84j-b9v1.step` / `bzx84j-b9v1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588916372369772544) (13 pp, sha256 `fcfb79c5f982558d`, retrieved 2026-10-16, tier: lcsc)
- **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/bzx84j-b9v1-datasheet.pdf)