# MM3Z12VCW

**YONGYUTAI** · Zener Diodes · SOD-323

MM3Z12VCW from YONGYUTAI, 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 end marked by the color band; for the MM3Z12VCW the Zener voltage is 12 V nominal (11.4 V to 12.7 V at Izt = 5 mA). |
| 2 | A | passive | Anode, the end opposite the color band; forward voltage is 0.9 V at IF = 10 mA and power dissipation is limited to 200 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YONGYUTAI |
| 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 | Vz | 11.4 | 12 | 12.7 | V | @Izt=5mA | 1 |
| Zener Test Current | Izt |  | 5 |  | mA |  | 1 |
| Maximum Zener Impedance | Zzt |  |  | 25 | Ω | @Izt | 1 |
| Maximum Zener Impedance (knee) | Zzk |  |  | 150 | Ω | @Izk=1.0mA | 1 |
| Maximum Reverse Current | IR |  |  | 0.1 | uA | @VR=8.0V | 1 |
| Temperature Coefficient of Zener Voltage | IZTC | 6 |  | 10 | mV/℃ | Test current 5 mA | 1 |
| Power Dissipation | Pd |  |  | 200 | mW |  | 1 |
| Forward Voltage | Vf |  |  | 0.9 | V | @IF=10mA | 1 |
| Storage temperature range | Ts | -65 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `MM3Z12VCW`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mm3z12vcw-etched.step` / `mm3z12vcw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm3z12vcw.step` / `mm3z12vcw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YONGYUTAI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589837035357048832) (5 pp, sha256 `a2a39bd66bd9dfb7`, 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/mm3z12vcw-datasheet.pdf)