# ULC9L5V

**Leiditech** · ESD Protection Devices · SOD-923

ULC9L5V from Leiditech, in a SOD-923. 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 | Pin 1 | passive | The SOD-923 pin configuration labels this terminal as Pin 1, but the datasheet gives no function, polarity, or electrical limit for it. |
| 2 | Pin 2 | passive | The SOD-923 pin configuration labels this terminal as Pin 2, but the datasheet gives no function, polarity, or electrical limit for it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOD-923 |
| 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 stand-off voltage | VRWM |  |  | 5 | V |  | 2 |
| Breakdown voltage | VBR | 6 |  |  | V | IT = 1 mA | 2 |
| Clamping voltage | VC |  | 10 | 15 | V | @A column = 5 A | 2 |
| Reverse leakage current | IR |  |  | 0.5 | uA |  | 2 |
| Junction capacitance | C |  | 0.6 |  | pF |  | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -25 |  | 25 | kV |  | 1 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -20 |  | 20 | kV |  | 1 |
| Peak Pulse Power | Ppp |  |  | 75 | W | 8/20 us | 1 |
| Operating Temperature Range | TJ | -55 |  | 125 | °C |  | 1 |
| Storage Temperature Range | TSTJ | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `ULC9L5V`
- Footprint: `Diode_SMD:D_SOD-923`
- 3D model: SOD-923 (KiCad packages3D, STEP)
- 3D model files: `ulc9l5v-etched.step` / `ulc9l5v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ulc9l5v.step` / `ulc9l5v.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Leiditech datasheet](docs/ulc9l5v-datasheet.pdf) (4 pp, sha256 `9f2f05c6126f2b77`, retrieved 2026-10-21, 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/ulc9l5v-datasheet.pdf)