# MMBZ9V1AL

**FUXINSEMI** · Zener Diodes · SOT-23

MMBZ9V1AL from FUXINSEMI, in a SOT-23. 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 | K1 | passive | Cathode of the first Zener diode (unidirectional channel 1, 9.1 V nominal breakdown, 6.0 V working peak reverse voltage); tie to pin 2 for a single bidirectional configuration. |
| 2 | K2 | passive | Cathode of the second Zener diode (unidirectional channel 2, 9.1 V nominal breakdown, 6.0 V working peak reverse voltage); tie to pin 1 for a single bidirectional configuration. |
| 3 | A | passive | Common anode of both Zener diodes, shared by the two unidirectional channels. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MMBZ9V1AL`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz9v1al-etched.step` / `mmbz9v1al-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz9v1al.step` / `mmbz9v1al.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FUXINSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590234002943467520) (4 pp, sha256 `8e95083f7c704cc6`, retrieved 2026-10-13, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/mmbz9v1al-datasheet.pdf)