component

BST143A053U

Public Made by Adom

by adom

BORN 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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bst143a053u-etched.step bst143a053u: factory component page (tier=lcsc) · Ray 28d ago
bst143a053u-hero.glb bst143a053u: hero GLB from the etched model (keeps the MPN mark) · Ray 28d ago
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BST143A053U

BORN · ESD And Surge Protection (TVS/ESD) · SOT-143

BST143A053U from BORN, 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 REF1 power_in Negative reference (REF1) of the steering diodes; it should be connected directly to a ground plane with the shortest possible path to minimize parasitic inductance.
2 I/O1 passive Protected data line 1; the steering diodes clamp transients on this line to the reference, and the device has a 5.0 V reverse stand-off voltage (VRWM).
3 I/O2 passive Protected data line 2; the steering diodes clamp transients on this line to the reference, and the device has a 5.0 V reverse stand-off voltage (VRWM).
4 REF2 passive Positive reference (REF2); it may be tied directly to VCC, tied to VCC through a 10 kΩ series resistor for supply isolation, or left unconnected so the internal TVS is used as the reference.

Key specifications

Parameter Value
Manufacturer BORN
Package SOT-143
Category Circuit Protection
Pins 4

CAD (KiCad official)

  • Symbol: BST143A053U
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143 (KiCad packages3D, STEP)
  • 3D model files: bst143a053u-etched.step / bst143a053u-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bst143a053u.step / bst143a053u.glb are the bare package body.

Provenance

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

  • Datasheet: BORN datasheet (7 pp, sha256 01ad1a8633e1c096, retrieved 2026-10-09, 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