# DZL4738

**LGE** · Zener Diodes · SOD-123FL

DZL4738 from LGE, 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, marked by the laser band on the SOD-123FL package; the Zener voltage for DZL4738 is 7.79 V min, 8.2 V nom, 8.61 V max at IZT = 31 mA. |
| 2 | A | passive | Anode, the terminal opposite the cathode band; total power dissipation is 1.0 W with a junction temperature of 150 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| 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 (min/max) | VZ | 7.79 | 8.2 | 8.61 | V | @IZT | 2 |
| Zener test current | IZT |  | 31 |  | mA |  | 2 |
| Zener impedance | ZZT |  |  | 4.5 | Ω | @IZT | 2 |
| Knee zener impedance | ZZK |  |  | 700 | Ω | @IZK = 0.5 mA | 2 |
| Leakage current | IR |  |  | 10 | uA | @VR = 6.0 V | 2 |
| Power dissipation | PW |  |  | 1 | W | TA = 25 °C | 1 |
| Junction temperature | TJ |  |  | 150 | °C | TA = 25 °C | 1 |
| Storage temperature range | TSTG | -55 |  | 150 | °C | TA = 25 °C | 1 |

## CAD (KiCad official)

- Symbol: `DZL4738`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `dzl4738-etched.step` / `dzl4738-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dzl4738.step` / `dzl4738.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](docs/dzl4738-datasheet.pdf) (2 pp, sha256 `c6d82f84be6448d3`, 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/dzl4738-datasheet.pdf)