component
SMF28A
Public Made by Adomby adom
hongjiacheng 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.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 13d ago |
| viewers | 13d ago |
| package.json | 13d ago |
| page.json | 13d ago |
| README.md | 13d ago |
| smf28a-etched.glb | 13d ago |
| smf28a-etched.step | 13d ago |
| smf28a-hero.glb | 13d ago |
| smf28a-hero.overlay.json | 13d ago |
| smf28a.glb | 13d ago |
| smf28a.kicad_mod | 13d ago |
| smf28a.kicad_sym | 13d ago |
| smf28a.lbr | 13d ago |
| smf28a.step | 13d ago |
SMF28A
hongjiacheng · ESD And Surge Protection (TVS/ESD) · SOD-123FL
SMF28A from hongjiacheng, 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 | hongjiacheng |
| 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 (unidirectional, SMF28A) | VBR | 31.1 | V | @IT = 1 mA | 2 | ||
| Breakdown voltage (unidirectional, SMF28A) | VBR | 34.4 | V | @IT = 1 mA | 2 | ||
| Maximum clamping voltage (SMF28A) | VC | 45.4 | V | @IPP = 4.4 A | 2 | ||
| Peak pulse power dissipation | PPPM | 200 | W | 10/1000µs waveform (Fig.1)(Note 1), (Note 2) | 1 | ||
| Power dissipation on infinite heat sink | PM(AV) | 0.4 | W | TL=75°C | 1 | ||
| Peak forward surge current | IFSM | 30 | A | 8.3ms single half sine wave (Note 3) | 1 | ||
| Maximum instantaneous forward voltage (unidirectional only) | VF | 3.5 | V | at 25A for unidirectional only (Note 4) | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance junction to lead | RθJ-L | 100 | ℃/W | 1 | |||
| Typical thermal resistance junction to ambient | RθJ-A | 220 | ℃/W | 1 | |||
| Voltage tolerance (suffix A denotes 5% tolerance device) | VBR | -5 | 5 | % | Suffix 'A' denotes 5% tolerance device (Note 1 on page 3) | 3 |
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 compliant | 1 |
CAD (KiCad official)
- Symbol:
SMF28A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf28a-etched.step/smf28a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf28a.step/smf28a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (5 pp, sha256
c8f137df222c1c36, retrieved 2026-10-21, 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).