component

TPSMF4L78A

Public Made by Adom

by adom

Littelfuse ESD And Surge Protection (TVS/ESD), SOD-123FL. 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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TPSMF4L78A

Littelfuse · ESD And Surge Protection (TVS/ESD) · SOD-123FL

TPSMF4L78A from Littelfuse, in a SOD-123FL. 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 K passive Cathode of the uni-directional TVS diode, marked by the color band, connected to the protected line; reverse stand-off voltage VR is 78 V and breakdown voltage VBR is 86.7 V to 95.8 V at 1 mA.
2 A passive Anode of the uni-directional TVS diode, normally connected to ground or the return path; maximum clamping voltage is 126 V at Ipp of 3.2 A.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package SOD-123FL
Category Circuit Protection
Pins 2

CAD (KiCad official)

  • Symbol: TPSMF4L78A
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123FL (KiCad packages3D, STEP)
  • 3D model files: tpsmf4l78a-etched.step / tpsmf4l78a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tpsmf4l78a.step / tpsmf4l78a.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 0538aa3240013aeb, retrieved 2026-10-13, 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