component

TPSMF4L40A

Public Made by Adom

by adom

Littelfuse ESD And Surge Protection (TVS/ESD), SOD-123FL. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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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TPSMF4L40A

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

TPSMF4L40A 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package SOD-123FL
Category Circuit 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
Breakdown Voltage VBR 44.4 49.1 V @ IT = 1 mA 2
Reverse Stand-off Voltage VR 40 V 2
Maximum Reverse Leakage Current IR 1 µA @ VR = 40 V 2
Maximum Peak Pulse Current Ipp 6.2 A 10/1000µs surge waveform (Note 2) 2
Maximum Clamping Voltage VC 64.5 V @ Ipp 2
VBR Voltage Tolerance (A suffix) -5 5 % Per part numbering table: 5% VBR voltage tolerance 6
Peak Pulse Power Dissipation 8/20µs PPPM 2000 W TA=25ºC, 8/20µs (Note 2) 1
Peak Pulse Power Dissipation 10/1000µs PPPM 400 W TA=25ºC, 10/1000µs (Note 3) 1
Power Dissipation on Infinite Heat Sink PD 1 W TL=50ºC 1
Thermal Resistance Junction to Ambient RθJA 220 °C/W 1
Thermal Resistance Junction to Lead RθJL 100 °C/W 1
Operating and Storage Temperature Range TJ,TSTG -55 150 °C 1
VBR Temperature Coefficient αT 0.1 % VBR(TJ) = VBR@25°C x (1+αT x (TJ-25)); typical value 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin ■ Matte tin lead-free plated ■ Halogen-free and RoHS 1

CAD (KiCad official)

  • Symbol: TPSMF4L40A
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123FL (KiCad packages3D, STEP)
  • 3D model files: tpsmf4l40a-etched.step / tpsmf4l40a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tpsmf4l40a.step / tpsmf4l40a.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 2026-10-16, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band 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