component
LY143DA05UL
Public Made by Adomby adom
Liown ESD And Surge Protection (TVS/ESD), SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLY143DA05UL
Liown · ESD And Surge Protection (TVS/ESD) · SOT-143
LY143DA05UL from Liown, in a SOT-143. 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 | GND | power_in | Bottom rail of the steering-diode array, tied to the anode side of the internal TVS zener, so it is the ground/return reference for the protected lines. |
| 2 | I/O2 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 3 | I/O1 | passive | Protected I/O line connected between the steering diodes, with 0.8pF max capacitance to ground and 0.4pF max between I/O pins at 0V, 1MHz. |
| 4 | VCC | power_in | Top rail of the steering-diode array, tied to the cathode side of the internal TVS zener, with a reverse working voltage of 5V max. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
LY143DA05UL - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files:
ly143da05ul-etched.step/ly143da05ul-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ly143da05ul.step/ly143da05ul.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Liown datasheet (5 pp, sha256
9bdd1d9d0c876660, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).