component
MMSZ5256BT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+38@@ -0,0 +1,38 @@+# MMSZ5256BT1G++**onsemi** · Zener Diodes · SOD-123++MMSZ5256BT1G from onsemi, in a SOD-123. 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 | Cathode | passive | Cathode, indicated by the polarity band on the package; the MMSZ5256BT1G regulates at a nominal 30 V (28.5 V min, 31.5 V max) at IZT = 4.2 mA. |+| 2 | Anode | passive | Anode, the terminal opposite the polarity band; the device is rated 500 mW on an FR-5 board with junction and storage temperature of -55 °C to +150 °C. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOD-123 |+| Category | Diodes |+| Pins | 2 |++## CAD (KiCad official)++- Symbol: `MMSZ5256BT1G`+- Footprint: `Diode_SMD:D_SOD-123F`+- 3D model: SOD-123 (KiCad packages3D, STEP)+- 3D model files: `mmsz5256bt1g-etched.step` / `mmsz5256bt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmsz5256bt1g.step` / `mmsz5256bt1g.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/8588902175972478976) (8 pp, sha256 `2711e46b01090f07`, 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/mmsz5256bt1g-datasheet.pdf)
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