# MM3Z2V7

**ST Semtech** · Zener Diodes · SOD-323

MM3Z2V7 from ST Semtech, 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; Zener voltage 2.5...2.9 V (nom. 2.7 V) at IZT = 5 mA for MM3Z2V7. |
| 2 | A | passive | Anode of the Zener diode; forward voltage max. 0.9 V at IF = 10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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 |
|---|---|---|---|---|---|---|---|
| Dynamic Impedance | ZZT |  |  | 110 | Ω | IZT = 5 mA | 2 |
| Reverse Leakage Current | IR |  |  | 120 | μA | VR = 1 V | 2 |
| Forward Voltage | VF |  |  | 0.9 | V | IF = 10 mA | 1 |
| Thermal Resistance Junction to Ambient Air | RθJA |  |  | 417 | °C/W | Ta = 25 °C | 1 |
| Power Dissipation | Ptot |  |  | 300 | mW | Ta = 25 °C | 1 |
| Junction Temperature | Tj |  |  | 150 | °C | Ta = 25 °C | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C | Ta = 25 °C | 1 |
| Nominal Zener Voltage | Vznom |  | 2.7 |  | V | IZT = 5 mA | 2 |

## CAD (KiCad official)

- Symbol: `MM3Z2V7`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `mm3z2v7-etched.step` / `mm3z2v7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm3z2v7.step` / `mm3z2v7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ST Semtech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588880542653276160) (4 pp, sha256 `72319316ef11804c`, 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/mm3z2v7-datasheet.pdf)