# BZX584C20-HG3-08

**Vishay Intertech** · Zener Diodes · SOD-523

BZX584C20-HG3-08 from Vishay Intertech, in a SOD-523. 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Vishay Intertech |
| Package | SOD-523 |
| 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 | VZ | 18.8 | 20 | 21.2 | V | IZT1 = 5 mA; pulse test tP = 10 ms | 2 |
| Reverse leakage current | IR |  |  | 0.05 | μA | VR = 0.7 VZnom | 2 |
| Dynamic resistance | ZZ |  |  | 15 | Ω | at IZT1 = 5 mA | 2 |
| Dynamic resistance (knee) | ZZK |  |  | 60 | Ω | at IZT2 = 1 mA | 2 |
| Temperature coefficient of Zener voltage |  | 8 |  | 10 | 10-4/°C | at IZT1 = 5 mA | 2 |
| Zener voltage tolerance (series) |  | -5 |  | 5 | % | Series-wide tolerance stated in Features; no tolerance letter in MPN | 1 |
| Power dissipation | Ptot |  |  | 200 | mW | On FR-4 board with recommended soldering footprint | 1 |
| Power dissipation | Ptot |  |  | 300 | mW | On FR-4 board with 5 mm x 5 mm footprint | 1 |
| Junction temperature | Tj |  |  | 150 | °C |  | 1 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 1 |
| Thermal resistance junction to ambient air | RthJA |  |  | 600 | K/W | According to JEDEC 51-3 on FR-4 board with recommended soldering footprint | 1 |
| Thermal resistance junction to ambient air | RthJA |  |  | 400 | K/W | According to JEDEC 51-3 on FR-4 board with 5 mm x 5 mm footprint | 1 |
| Thermal resistance junction to lead | RthJL |  |  | 200 | K/W | Infinite heatsink | 1 |

## CAD (KiCad official)

- Symbol: `BZX584C20-HG3-08`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `bzx584c20-hg3-08-etched.step` / `bzx584c20-hg3-08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx584c20-hg3-08.step` / `bzx584c20-hg3-08.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Vishay Intertech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590896374005248000) (4 pp, sha256 `449f5859a8438910`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/bzx584c20-hg3-08-datasheet.pdf)