component
TPSMF4L20A
Public Made by Adomby adom
Littelfuse TVS, 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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownTPSMF4L20A
Littelfuse · TVS · SOD-123FL
TPSMF4L20A 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 (TPSMF4L20A row) | VBR | 22.2 | V | @ IT = 1 mA | 2 | ||
| Breakdown voltage (TPSMF4L20A row) | VBR | 24.5 | V | @ IT = 1 mA | 2 | ||
| Reverse stand-off voltage | VR | 20 | V | 2 | |||
| Maximum reverse leakage current | IR | 1 | µA | @ VR | 2 | ||
| Maximum peak pulse current | Ipp | 12.3 | A | 10/1000µs surge waveform (table note 2) | 2 | ||
| Maximum clamping voltage | VC | 32.4 | V | @ Ipp | 2 | ||
| Peak pulse power dissipation | PPPM | 2000 | W | 8/20 µs waveform, TA=25°C (note 2) | 1 | ||
| Peak pulse power dissipation | PPPM | 400 | W | 10/1000 µs waveform, TA=25°C (note 3) | 1 | ||
| Power dissipation on infinite heat sink | PD | 1 | W | at TL=50°C | 1 | ||
| Operating and storage temperature range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| Thermal resistance junction to ambient | RƟJA | 220 | °C/W | 1 | |||
| Thermal resistance junction to lead | RƟJL | 100 | °C/W | 1 | |||
| Breakdown voltage temperature coefficient | αT | 0.1 | % | VBR(TJ)=VBR@25°C×(1+αT×(TJ−25)) | 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:
TPSMF4L20A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
tpsmf4l20a-etched.step/tpsmf4l20a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmf4l20a.step/tpsmf4l20a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
0538aa3240013aeb, retrieved 2026-10-29, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).