component

PESD3V3L1UB

Public Made by Adom

by adom

UMW Electrostatic And Surge Protection (TVS/ESD), SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PESD3V3L1UB

UMW · Electrostatic And Surge Protection (TVS/ESD) · SOD-523

PESD3V3L1UB from UMW, 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 Pin 1 passive Pin 1 is one of the two terminals of the unidirectional ESD protection diode, with limits between pin 1 and pin 2 of VRWM 3.3 V, VCL 11 V at IPP 1 A, and ESD protection up to 30 kV (IEC 61000-4-2 level 4).
2 Pin 2 passive Pin 2 is the other terminal of the unidirectional ESD protection diode; the datasheet measures all electrical limits from pin 1 to pin 2, including peak pulse current 4.5 A (8/20 µs) and diode capacitance 34 pF.

Key specifications

Parameter Value
Manufacturer UMW
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
Peak pulse power PPP 45 W tp=8/20μs 2
Peak pulse current IPP 4.5 A tp=8/20μs 2
Junction temperature TJ 150 °C 2
Ambient temperature Tamb -55 150 °C 2
Storage temperature TSTG -65 150 °C 2
Electrostatic discharge voltage (IEC 61000-4-2 contact discharge) VESD 30 kV IEC 61000-4-2 (contact discharge) 2
Electrostatic discharge voltage (machine model) VESD 400 V machine model 2
Electrostatic discharge voltage (human body model) VESD 16 kV MIL-STD-883 (human body model) 2
Breakdown voltage VBR 5.3 5.6 6 V IR=1mA 3
Reverse leakage current IRM 100 nA VRWM=3.3V 3
Reverse standoff voltage VRWM 3.3 V 3
Diode capacitance Cd 34 40 pF VR=0V, f=1MHz 3
Clamping voltage VCL 8 V IPP=1A 3
Clamping voltage VCL 11 V IPP=4.5A 3
Forward voltage VF 1.2 V IF=200mA 3

CAD (KiCad official)

  • Symbol: PESD3V3L1UB
  • Footprint: Diode_SMD:D_SOD-523
  • 3D model: SOD-523 (KiCad packages3D, STEP)
  • 3D model files: pesd3v3l1ub-etched.step / pesd3v3l1ub-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pesd3v3l1ub.step / pesd3v3l1ub.glb are the bare package body.

Provenance

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

  • Datasheet: UMW datasheet (7 pp, sha256 c423f3cf667af361, 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