component
SMF4L17A
Public Made by Adomby adom
Semiwell 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.
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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README
markdownSMF4L17A
Semiwell · ESD And Surge Protection (TVS/ESD) · SOD-123FL
SMF4L17A from Semiwell, 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 | Semiwell |
| 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 Min | VBR | 18.9 | V | @IT | 2 | ||
| Breakdown Voltage Max | VBR | 20.9 | V | @IT | 2 | ||
| Maximum Clamping Voltage | VC | 27.6 | V | @IPP | 2 | ||
| Peak Pulse Current | IPP | 14.5 | A | 2 | |||
| Reverse Leakage | IR | 1 | uA | @VRWM | 2 | ||
| Reverse Stand-off Voltage | VRWM | 17 | V | 2 | |||
| Test Current | IT | 1 | mA | 2 | |||
| Peak Pulse Power Dissipation | PPPM | 400 | Watts | 10/1000us waveform (Note1) | 1 | ||
| Steady State Power Dissipation | PD | 2.8 | Watts | TL=75°C | 1 | ||
| Operating Junction Temperature | TJ | -55 | 150 | ℃ | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 1 | ||
| Junction to Ambient Thermal Resistance | RθJA | 220 | ℃/W | on printed circuit | 1 |
CAD (KiCad official)
- Symbol:
SMF4L17A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf4l17a-etched.step/smf4l17a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf4l17a.step/smf4l17a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Semiwell datasheet (7 pp, sha256
98d57cc83bdddbee, retrieved 2026-10-22, 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).