# LY323DC15UL

**Liown** · ESD And Surge Protection (TVS/ESD) · SOD-323

LY323DC15UL from Liown, 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 | 1 | passive | One terminal of the bi-directional TVS diode for LY323DC15UL, shown as pin 1 in the Pin Configuration figure; the text gives no separate function or limit for this terminal. |
| 2 | 2 | passive | The other terminal of the bi-directional TVS diode for LY323DC15UL, shown as pin 2 in the Pin Configuration figure; the text gives no separate function or limit for this terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SOD-323 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse working voltage | VRWM |  |  | 15 | V | TA=25℃ | 2 |
| Reverse breakdown voltage (min) | VBR | 16.7 |  |  | V | TA=25℃, @IT=1mA | 2 |
| Reverse leakage current | IR |  |  | 0.2 | µA | TA=25℃, @VRWM | 2 |
| Clamping voltage | VC |  |  | 21 | V | TA=25℃, @1A | 2 |
| Clamping voltage | VC |  |  | 30 | V | TA=25℃, @IPP, 8/20µs | 2 |
| Peak pulse current | IPP |  |  | 10 | A | TA=25℃ | 2 |
| Junction capacitance | CJ |  | 1 |  | pF | TA=25℃, VR=0V, f=1MHz | 2 |
| Peak pulse power (8/20µs) | PPP |  |  | 300 | W | TA=25℃, 8/20µs | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 Air discharge | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 Contact discharge | 2 |
| Ambient temperature range | TA | -55 |  | 125 | ℃ |  | 2 |
| Storage temperature range | TSTG | -55 |  | 150 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `LY323DC15UL`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ly323dc15ul-etched.step` / `ly323dc15ul-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ly323dc15ul.step` / `ly323dc15ul.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Liown datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590232990573375488) (5 pp, sha256 `3f2d02a1f20f6ce6`, retrieved 2026-10-31, 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/ly323dc15ul-datasheet.pdf)