component
SM4F20A
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech ESD And Surge Protection (TVS/ESD), SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SM4F20A
Yangzhou Yangjie Elec Tech · ESD And Surge Protection (TVS/ESD) · SOD-123
SM4F20A from Yangzhou Yangjie Elec Tech, in a SOD-123. 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 | Yangzhou Yangjie Elec Tech |
| Package | SOD-123 |
| 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 (Uni-directional) | VBR | 22.2 | 24.5 | V | IT = 1 mA | 2 | |
| Maximum reverse leakage current | IR | 1 | μA | @ VRWM | 2 | ||
| Maximum reverse surge current | IPP | 12.34 | A | Note (2): surge current waveform per Fig. 2, derated per Fig. 3 | 2 | ||
| Maximum clamping voltage | VC | 32.4 | V | @ IPP | 2 | ||
| Working peak reverse voltage | VRWM | 20 | V | 2 | |||
| Peak power dissipation | PPPM | 400 | W | with a 10/1000us waveform | 1 | ||
| Power dissipation, on infinite heat sink | PD | 0.8 | W | TL=75℃ | 1 | ||
| Peak forward surge current | IFSM | 30 | A | 8.3 ms single half sine-wave, unidirectional only (note 3) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to lead | RθJL | 26 | ℃/W | Between junction and lead | 1 | ||
| Thermal resistance, junction to ambient | RθJA | 300 | ℃/W | Between junction and ambient | 1 | ||
| Thermal resistance, junction to case | RθJC | 40 | ℃/W | Between junction and curve (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 | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SM4F20A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
sm4f20a-etched.step/sm4f20a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm4f20a.step/sm4f20a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (5 pp, sha256
29379f73d5cbe6ce, retrieved 2026-10-17, 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).
# SM4F20A
**Yangzhou Yangjie Elec Tech** · ESD And Surge Protection (TVS/ESD) · SOD-123
SM4F20A from Yangzhou Yangjie Elec Tech, in a SOD-123. 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 | Yangzhou Yangjie Elec Tech |
| Package | SOD-123 |
| 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 (Uni-directional) | VBR | 22.2 | | 24.5 | V | IT = 1 mA | 2 |
| Maximum reverse leakage current | IR | | | 1 | μA | @ VRWM | 2 |
| Maximum reverse surge current | IPP | | | 12.34 | A | Note (2): surge current waveform per Fig. 2, derated per Fig. 3 | 2 |
| Maximum clamping voltage | VC | | | 32.4 | V | @ IPP | 2 |
| Working peak reverse voltage | VRWM | | | 20 | V | | 2 |
| Peak power dissipation | PPPM | | | 400 | W | with a 10/1000us waveform | 1 |
| Power dissipation, on infinite heat sink | PD | | | 0.8 | W | TL=75℃ | 1 |
| Peak forward surge current | IFSM | | | 30 | A | 8.3 ms single half sine-wave, unidirectional only (note 3) | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 | | 150 | ℃ | | 1 |
| Thermal resistance, junction to lead | RθJL | | 26 | | ℃/W | Between junction and lead | 1 |
| Thermal resistance, junction to ambient | RθJA | | 300 | | ℃/W | Between junction and ambient | 1 |
| Thermal resistance, junction to case | RθJC | | 40 | | ℃/W | Between junction and curve (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 | | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
## CAD (KiCad official)
- Symbol: `SM4F20A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `sm4f20a-etched.step` / `sm4f20a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm4f20a.step` / `sm4f20a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603373559868121088) (5 pp, sha256 `29379f73d5cbe6ce`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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).
[Datasheet PDF](docs/sm4f20a-datasheet.pdf)