component

UESD54B

Public Made by Adom

by adom

Union Semiconductor ESD Protection Devices, SOD-523. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componenttvs-fuse-board level protectionuesd54bfactory-2.0.0extractor-text
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 17d ago
viewers uesd54b: symbol repaired (bidirectional TVS (the page says so)) · Ray 4d ago
package.json Publish 0.1.0 · Ray 17d ago
page.json Set visibility: public · Ray 17d ago
README.md Publish 0.1.0 · Ray 17d ago
uesd54b-etched.glb Publish 0.1.0 · Ray 17d ago
uesd54b-etched.step uesd54b: factory component page (tier=lcsc) · Ray 17d ago
uesd54b-hero.glb uesd54b: hero GLB from the etched model (keeps the MPN mark) · Ray 17d ago
uesd54b-hero.overlay.json Publish 0.1.0 · Ray 17d ago
uesd54b.glb Publish 0.1.0 · Ray 17d ago
uesd54b.kicad_mod Publish 0.1.0 · Ray 17d ago
uesd54b.kicad_sym uesd54b: symbol repaired (bidirectional TVS (the page says so)) · Ray 4d ago
uesd54b.lbr uesd54b: symbol repaired (bidirectional TVS (the page says so)) · Ray 4d ago
uesd54b.step Publish 0.1.0 · Ray 17d ago

UESD54B

Union Semiconductor · ESD Protection Devices · SOD-523

UESD54B from Union Semiconductor, in a SOD-523. 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 Terminal 1 of an unpolarised fuse; either orientation.
2 2 passive Terminal 2 of an unpolarised fuse; either orientation.

Key specifications

Parameter Value
Manufacturer Union Semiconductor
Package SOD-523
Category TVS/Fuse/Board Level 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 Breakdown Voltage VBR 6 6.8 7.2 V IT=1mA 2
Reverse Stand-Off Voltage VRWM 5 V 2
Reverse Leakage Current IR 0.1 μA VRWM=5V, T=25°C 2
Clamping Voltage VC 9.1 V IPP=5A, tp=8/20μs 2
Clamping Voltage VC 13 V IPP=11A, tp=8/20μs 2
Junction Capacitance CJ 40 50 pF Between I/O Pins and GND, VR=0V, f=1MHz 2
Junction Capacitance CJ 30 40 pF Between I/O Pins and GND, VR=2.5V, f=1MHz 2
Peak Pulse Power PPK 140 Watts tP=8/20μs 2
Peak Pulse Current IPP 11 A tP=8/20μs 2
Lead Soldering Temperature TL 260 °C 10 sec. 2
Operating Temperature TJ -55 125 °C 2
Storage Temperature TSTG -55 125 °C 2

CAD (KiCad official)

  • Symbol: UESD54B
  • Footprint: Diode_SMD:D_SOD-523
  • 3D model: SOD-523 (KiCad packages3D, STEP)
  • 3D model files: uesd54b-etched.step / uesd54b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uesd54b.step / uesd54b.glb are the bare package body.

Provenance

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

  • Datasheet: Union Semiconductor datasheet (9 pp, sha256 3e1290bc889ac52a, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (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