# LUDZS5.1BT1G

**LRC** · Zener Diodes · SOD-323

LUDZS5.1BT1G from LRC, in a SOD-323. 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 terminal of the Zener diode, indicated by the polarity band on the package. |
| 2 | ANODE | passive | Anode terminal of the Zener diode, opposite the cathode (polarity band). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOD-323 |
| 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 | VZ | 4.98 |  | 5.2 | V | IZ = 5 mA | 3 |
| Zener impedance (operating resistance) | ZZT |  |  | 80 | Ω | IZ = 5 mA | 3 |
| Zener impedance (rising operating resistance) | ZZK |  |  | 500 | Ω | IZK = 5 mA | 3 |
| Reverse leakage current | IR |  |  | 0.5 | µA | VR = 2 V | 3 |
| Forward voltage | VF |  |  | 0.9 | V | IF = 10 mA | 2 |
| Power dissipation | P |  |  | 200 | mW | Ta=25°C | 1 |
| Junction temperature | Tj |  |  | 150 | °C |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | °C |  | 1 |
| Operating temperature | Topr | -55 |  | 150 | °C |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  | 635 |  | °C/W | Junction to ambient | 1 |

## CAD (KiCad official)

- Symbol: `LUDZS5.1BT1G`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ludzs5-1bt1g-etched.step` / `ludzs5-1bt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ludzs5-1bt1g.step` / `ludzs5-1bt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586178886036574208) (5 pp, sha256 `75d6a738b864e1ee`, retrieved 2026-10-23, 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/ludzs5-1bt1g-datasheet.pdf)