component

ESD3V3U1UT-MS

Public Made by Adom

by adom

MSKSEMI ESD And Surge Protection (TVS/ESD), SOT-23. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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ESD3V3U1UT-MS

MSKSEMI · ESD And Surge Protection (TVS/ESD) · SOT-23

ESD3V3U1UT-MS from MSKSEMI, in a SOT-23. 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 I/O1 passive Protected line 1 (diode to common pin 3); VRWM 3.3V max, VB 4V min at 1mA, IR 40µA max, CT 1.5pF max.
2 I/O2 passive Protected line 2 (diode to common pin 3); VRWM 3.3V max, VB 4V min at 1mA, IR 40µA max, CT 1.5pF max.
3 COMMON passive Common node of the two protection diodes shown on the pin diagram, shared by pins 1 and 2; 80W peak pulse power (8/20µs).

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-23
Category Circuit Protection
Pins 3

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 working voltage VRWM 3.3 V 2
Breakdown voltage VB 4 V IT = 1 mA 2
Clamping voltage at 1 A VC@1A 7 V @ 1 A 2
Clamping voltage VC 14 V @ 5 A 2
Reverse leakage current IR 40 µA 2
Line capacitance CT 1.5 pF 2
Peak pulse power PPK 80 Watts tp = 8/20μs 2
Lead soldering temperature TL 260 ℃ 10 sec 2
Operating temperature TJ -55 125 ℃ 2
Storage temperature TSTG -55 150 ℃ 2

CAD (KiCad official)

  • Symbol: ESD3V3U1UT-MS
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: esd3v3u1ut-ms-etched.step / esd3v3u1ut-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esd3v3u1ut-ms.step / esd3v3u1ut-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (5 pp, sha256 40f85f4f91f75ffb, retrieved 2026-10-21, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF