# MMBZ5226BLT1G

**onsemi** · Zener Diodes · SOT-23

MMBZ5226BLT1G from onsemi, 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 | Anode | passive | Anode of the Zener diode; the datasheet gives forward voltage VF of 0.95 V max at IF = 10 mA for this series, with the cathode marked by the polarity band on the package. |
| 2 | NC | unconnected | No connection per the Style 8 pinout, so this pin is not connected internally and is not used in the circuit. |
| 3 | Cathode | passive | Cathode of the Zener diode, identified by the polarity band; for the MMBZ5226BLT1G the nominal Zener voltage VZ is 3.3 V (3.13 V min to 3.47 V max) at IZT = 20 mA. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `MMBZ5226BLT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz5226blt1g-etched.step` / `mmbz5226blt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz5226blt1g.step` / `mmbz5226blt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586178745229053952) (6 pp, sha256 `bdbb8fa2d7f751fd`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/mmbz5226blt1g-datasheet.pdf)