component
SMF17A
Public Made by Adomby adom
TWGMC TVS, 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 | 13d ago |
| viewers | 13d ago |
| package.json | 13d ago |
| page.json | 13d ago |
| README.md | 13d ago |
| smf17a-etched.glb | 13d ago |
| smf17a-etched.step | 13d ago |
| smf17a-hero.glb | 13d ago |
| smf17a-hero.overlay.json | 13d ago |
| smf17a.glb | 13d ago |
| smf17a.kicad_mod | 13d ago |
| smf17a.kicad_sym | 13d ago |
| smf17a.lbr | 13d ago |
| smf17a.step | 13d ago |
SMF17A
TWGMC · TVS · SOD-123FL
SMF17A from TWGMC, 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 terminal of the unipolar TVS diode, identified as pin 1 in the datasheet PINNING table; the datasheet gives no separate electrical limits for this pin. |
| 2 | Anode | passive | Anode terminal of the unipolar TVS diode, identified as pin 2 in the datasheet PINNING table; the datasheet gives no separate electrical limits for this pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| 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 (test current IT = 1 mA) | VBR | 18.9 | 20.9 | V | IT = 1 mA (unidirectional SMF17A row) | 2 | |
| Reverse leakage current | IR | 1 | μA | at VRWM = 17 V | 2 | ||
| Maximum clamp voltage | VC | 27.6 | V | at IPP = 7.2 A | 2 | ||
| Peak pulse current | IPP | 7.2 | A | 10/1000 μs waveform, as listed in Characteristics table | 2 | ||
| Peak pulse power dissipation | PPPM | 200 | W | TA = 25°C, Note 1, 2, 5, Fig 1; tp = 10/1000 μs | 1 | ||
| Peak forward surge current (UNI) | IFSM | 20 | A | 8.3 ms single half sinewave, Note 3 | 1 | ||
| Steady state power dissipation | PM(AV) | 1 | W | Note 4, lead temperature TL = 75°C as printed | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| Stand-off voltage (reverse working voltage) | VRWM | 17 | V | Printed as VRWM in the characteristics table for the 17 V type | 2 | ||
| Typical thermal resistance, junction to ambient | RθJA | 180 | °C/W | Typical, as printed | 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 5mm copper pads to each terminal | 1 |
CAD (KiCad official)
- Symbol:
SMF17A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf17a-etched.step/smf17a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf17a.step/smf17a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TWGMC datasheet (4 pp, sha256
7482e9303bc57c8b, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).