# MM3Z3V9B

**GOODWORK** · Zener Diodes · SOD-323

MM3Z3V9B from GOODWORK, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GOODWORK |
| 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 | 3.82 | 3.9 | 3.98 | V | at IZT = 5 mA, pulse 20 ms | 2 |
| Dynamic Impedance | ZZT |  |  | 130 | Ω | at IZT = 5 mA | 2 |
| Reverse Current | IR |  |  | 5 | µA | VR = 1 V | 2 |
| Zener Test Current | IZT |  | 5 |  | mA |  | 2 |
| Power Dissipation | Ptot |  |  | 300 | mW |  | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 |  | 150 | °C |  | 1 |
| Forward Voltage | VF |  |  | 0.9 | V | IF = 10 mA | 1 |
| Thermal resistance junction to ambient | RθJA |  | 417 |  | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper area pads | 1 |

## CAD (KiCad official)

- Symbol: `MM3Z3V9B`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mm3z3v9b-etched.step` / `mm3z3v9b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm3z3v9b.step` / `mm3z3v9b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GOODWORK datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755853572423081984) (5 pp, sha256 `22509b4e69b29719`, retrieved 2026-10-22, 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/mm3z3v9b-datasheet.pdf)