component
SMF350A
Public Made by Adomby adom
YFW Electrostatic And Surge Protection (TVS/ESD), SOD-123FL. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 8d ago |
| viewers | 8d ago |
| package.json | 8d ago |
| page.json | 8d ago |
| README.md | 8d ago |
| smf350a-etched.glb | 8d ago |
| smf350a-etched.step | 8d ago |
| smf350a-hero.glb | 8d ago |
| smf350a-hero.overlay.json | 8d ago |
| smf350a.glb | 8d ago |
| smf350a.kicad_mod | 8d ago |
| smf350a.kicad_sym | 8d ago |
| smf350a.lbr | 8d ago |
| smf350a.step | 8d ago |
SMF350A
YFW · Electrostatic And Surge Protection (TVS/ESD) · SOD-123FL
SMF350A from YFW, 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 | Cathode | passive | Cathode of the unipolar SMF350A TVS diode, with 350 V working peak reverse voltage, 391 V to 432 V breakdown at 1 mA, and 567 V max clamping voltage at 0.4 A peak pulse current. |
| 2 | Anode | passive | Anode of the unipolar SMF350A TVS diode, rated for 200 W peak pulse power (10/1000 us) and 1 uA max reverse leakage at VRWM. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOD-123FL |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off (working peak reverse) voltage | VRWM | 350 | V | 2 | |||
| Breakdown voltage | VBR | 391 | 432 | V | @ IT | 2 | |
| Breakdown test current | IT | 1 | mA | 2 | |||
| Reverse leakage current | IR | 1 | μA | @ VRWM | 2 | ||
| Maximum clamping voltage | VC | 567 | V | @ IPP | 2 | ||
| Peak pulse current | IPP | 0.4 | A | 2 | |||
| Peak pulse power dissipation | PPPM | 200 | W | TA=25°C, 10/1000us waveform | 1 | ||
| Peak forward surge current | IFSM | 20 | A | 8.3ms single half sinewave (UNI) | 1 | ||
| Steady state power dissipation | PM(AV) | 1 | W | lead temperature TL=75°C | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| Typical thermal resistance | RθJA | 180 | °C/W | 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 | copper | 2. Mounted on 5mm2 copper pads to each terminal | 1 |
CAD (KiCad official)
- Symbol:
SMF350A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf350a-etched.step/smf350a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf350a.step/smf350a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (4 pp, sha256
e622291b3f700ab4, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).