component

LY143DA05UL

Public Made by Adom

by adom

Liown ESD And Surge Protection (TVS/ESD), SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 28d ago
viewers ly143da05ul: viewers · Ray 28d ago
ly143da05ul-etched.glb ly143da05ul: factory component page (tier=lcsc) · Ray 28d ago
ly143da05ul-etched.step ly143da05ul: factory component page (tier=lcsc) · Ray 28d ago
ly143da05ul-hero.glb ly143da05ul: hero GLB from the etched model (keeps the MPN mark) · Ray 28d ago
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ly143da05ul.glb Publish 0.1.0 · Ray 28d ago
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ly143da05ul.step Publish 0.1.0 · Ray 28d ago
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LY143DA05UL

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ly143da05ul.step / ly143da05ul.glb are 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, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF