# MM3Z8V2BW

**Tak Cheong** · Zener Diodes · SOD-323

MM3Z8V2BW from Tak Cheong, 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 of the zener diode (marked by the band); MM3Z8V2BW has VZ 8.04 V min, 8.2 V nom, 8.36 V max at IZT = 5 mA. |
| 2 | A | passive | Anode of the zener diode; device power dissipation is limited to 200 mW at TA = 25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Tak Cheong |
| 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 | 8.04 | 8.2 | 8.36 | V | IZT = 5 mA | 1 |
| Zener Voltage Tolerance |  | -2 |  | 2 | % | B series, on nominal zener voltage | 2 |
| Dynamic Zener Impedance | ZZT |  |  | 15 | Ω | IZT = 5 mA | 1 |
| Knee Zener Impedance | ZZK |  |  | 75 | Ω | IZK = 1 mA | 1 |
| Reverse Leakage Current | IR |  |  | 0.63 | μA | VR = 5 V | 1 |
| Forward Voltage | VF |  |  | 1 | V | IF = 10 mA | 2 |
| Power Dissipation | PD |  |  | 200 | mW | TA = 25°C | 1 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 1 |
| Operating Temperature Range | TOPR | -65 |  | 150 | °C |  | 1 |
| Zener Test Current | IZT |  | 5 |  | mA |  | 1 |
| Knee Test Current | IZK |  | 1 |  | mA |  | 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 | ƒ Matte Tin(Sn) Lead Finish ƒ Band Indicates Cathode | 1 |

## CAD (KiCad official)

- Symbol: `MM3Z8V2BW`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mm3z8v2bw-etched.step` / `mm3z8v2bw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm3z8v2bw.step` / `mm3z8v2bw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Tak Cheong datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588902628146728961) (5 pp, sha256 `0bcc11f5d46e268c`, 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/mm3z8v2bw-datasheet.pdf)