# SODZ18A-SH

**LRC** · Zener Diodes · SOD-123FL

SODZ18A-SH from LRC, in a SOD-123FL. 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 of the Zener diode, marked by the color band; the 18 V (Z18) device regulates at Vz=18 V at Izt=14 mA. |
| 2 | A | passive | Anode of the Zener diode; the device is rated 1.0 W steady-state power dissipation at TL=75°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOD-123FL |
| 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 Tolerance | Vz tolerance | -5 |  | 5 | % | Tested with pulse tp=40ms Ta=25°C | 2 |
| Zener Test Current | Izt |  | 14 |  | mA |  | 2 |
| Dynamic Impedance | Zzt |  |  | 20 | Ohms | @ Izt | 2 |
| Knee Dynamic Impedance | Zzk |  |  | 1300 | Ohms | @ Izk | 2 |
| Reverse Voltage | VR |  | 13.7 |  | V |  | 2 |
| Maximum Regulator Current | IZM |  |  | 50 | mA | Tamb = 50°C | 2 |
| Maximum Forward Voltage | Vfmax |  |  | 1.2 | V | IF = 200mA | 2 |
| Steady State Power Dissipation | PM(AV) |  |  | 1 | Watts | TL=75°C (Note 1) | 1 |
| Operating and Storage Temperature Range | TJ,TSTG | -50 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SODZ18A-SH`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `sodz18a-sh-etched.step` / `sodz18a-sh-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sodz18a-sh.step` / `sodz18a-sh.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](docs/sodz18a-sh-datasheet.pdf) (12 pp, sha256 `bf4055fed2f92feb`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/sodz18a-sh-datasheet.pdf)