# BZX84C4V3W-7-F

**Diodes Incorporated** · Zener Diodes · SOT-323

BZX84C4V3W-7-F from Diodes Incorporated, in a SOT-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 | A | passive | Anode of the Zener diode, the lower-left lead in the device schematic. |
| 2 | NC | unconnected | No internal connection; the lower-right lead in the device schematic is not connected to the diode. |
| 3 | K | passive | Cathode of the Zener diode, the single top lead in the device schematic. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-323 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal 4.3 V, type BZX84C4V3W, marking KRH) | VZ | 4 | 4.3 | 4.6 | V | @ IZT = 5mA | 2 |
| Maximum Zener impedance | ZZT |  |  | 90 | Ω | @ IZT = 5mA (Note 6: f = 1KHz) | 2 |
| Maximum Zener impedance | ZZK |  |  | 600 | Ω | @ IZK = 1.0 mA (Note 6: f = 1KHz) | 2 |
| Maximum reverse current | IR |  |  | 3 | uA | @ VR = 1.0 V | 2 |
| Temperature coefficient of Zener voltage |  | -3.5 |  | 0 | mV/°C | @ IZT = 5mA | 2 |
| Forward voltage | VF |  |  | 0.9 | V | @ IF = 10mA | 1 |
| Power dissipation | PD |  |  | 200 | mW | Note 3: mounted on FR4 PC board with recommended pad layout | 1 |
| Thermal resistance, junction to ambient air | RθJA |  | 625 |  | K/W | Note 3: mounted on FR4 PC board with recommended pad layout | 1 |
| Operating and storage temperature range | TJ, TSTG | -65 |  | 125 | °C |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | • Terminals: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over Alloy 42 | 1 |

## CAD (KiCad official)

- Symbol: `BZX84C4V3W-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bzx84c4v3w-7-f-etched.step` / `bzx84c4v3w-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c4v3w-7-f.step` / `bzx84c4v3w-7-f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560097216682614784) (4 pp, sha256 `d9219bc3aedc6fa2`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/bzx84c4v3w-7-f-datasheet.pdf)