# MMBZ9V1A

**JSMSEMI** · ESD And Surge Protection (TVS/ESD) · SOT-23

MMBZ9V1A from JSMSEMI, 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 | 1 | passive | Cathode 1 of dual transient voltage suppressor providing unidirectional ESD protection with Pin 3 (common anode), with breakdown voltage 8.65-9.56V and clamping voltage of 14V at 1.7A peak pulse current. |
| 2 | 2 | passive | Cathode 2 of dual transient voltage suppressor providing unidirectional ESD protection with Pin 3 (common anode), with breakdown voltage 8.65-9.56V and clamping voltage of 14V at 1.7A peak pulse current. |
| 3 | 3 | power_in | Common Anode connection shared by both transient voltage suppressor diodes, providing the return path for both unidirectional protection circuits (Pins 1-3 and Pins 2-3). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MMBZ9V1A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz9v1a-etched.step` / `mmbz9v1a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz9v1a.step` / `mmbz9v1a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589785537407324160) (5 pp, sha256 `2ed1d6c11b4c2134`, retrieved 2026-09-29, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mmbz9v1a-datasheet.pdf)