# MM1Z11

**FOSAN** · Zener Diodes · SOD-123

MM1Z11 from FOSAN, 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 | K | passive | Cathode (marked − in the internal configuration diagram); the zener regulates at VZ = 11 V nominal (10.4-11.6 V at IZT = 5 mA) when reverse-biased, with a 500 mW power dissipation limit. |
| 2 | A | passive | Anode (marked + in the internal configuration diagram); forward voltage is 0.9 V max at IF = 10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOSAN |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal) | VZ | 10.4 | 11 | 11.6 | V | @ IZT = 5 mA | 2 |
| Power dissipation | PD |  |  | 500 | mW | TA=25℃ | 1 |
| Forward voltage | VF |  |  | 0.9 | V | IF=10mA | 1 |
| Thermal resistance junction-ambient | RθJA |  |  | 340 | ℃/W |  | 1 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Zener dynamic impedance | ZZT |  | 30 |  | Ω | @ IZT = 5 mA | 2 |
| Reverse leakage current | IR |  | 0.1 |  | uA | @ VR = 8 V | 2 |

## CAD (KiCad official)

- Symbol: `MM1Z11`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `mm1z11-etched.step` / `mm1z11-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm1z11.step` / `mm1z11.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOSAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757319167576162304) (3 pp, sha256 `984573409b7ee47d`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/mm1z11-datasheet.pdf)