component
TPSMF4L18A
Public Made by Adomby adom
Littelfuse 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.
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TPSMF4L18A
Littelfuse · ESD And Surge Protection (TVS/ESD) · SOD-123FL
TPSMF4L18A from Littelfuse, 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 | Littelfuse |
| 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 (min) | VBR | 20 | V | @ IT, test current 1 mA (VBR measured after IT applied for 300µs) | 2 | ||
| Breakdown Voltage VBR (max) | VBR | 22.1 | V | @ IT, test current 1 mA (VBR measured after IT applied for 300µs) | 2 | ||
| Reverse Stand-off Voltage VR | VR | 18 | V | Maximum voltage that can be applied without operation (datasheet definition of VR) | 2 | ||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR | 2 | ||
| Maximum Peak Pulse Current | Ipp | 13.7 | A | Surge current per 10/1000µs exponential waveform, derated per Fig.3 (table note 2) | 2 | ||
| Maximum Clamping Voltage | VC | 29.2 | V | @ Ipp | 2 | ||
| Peak Pulse Power Dissipation (8/20µs) | PPPM | 2000 | W | TA=25ºC, 8/20µs (Note 2); series-wide value | 1 | ||
| Peak Pulse Power Dissipation (10/1000µs) | PPPM | 400 | W | TA=25ºC, 10/1000µs (Note 3); series-wide value | 1 | ||
| Power Dissipation on Infinite Heat Sink | PD | 1 | W | at TL=50ºC | 1 | ||
| Operating and Storage Temperature Range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| VBR Temperature Coefficient | αT | 0.1 | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)); typical value, series-wide (Features) | 1 | ||
| Thermal Resistance Junction to Ambient | RƟJA | 220 | °C/W | Junction to ambient | 1 | ||
| Thermal Resistance Junction to Lead | RƟJL | 100 | °C/W | Junction to lead | 1 |
CAD (KiCad official)
- Symbol:
TPSMF4L18A - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
tpsmf4l18a-etched.step/tpsmf4l18a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmf4l18a.step/tpsmf4l18a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
0538aa3240013aeb, retrieved 2026-10-14, 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).
# TPSMF4L18A
**Littelfuse** · ESD And Surge Protection (TVS/ESD) · SOD-123FL
TPSMF4L18A from Littelfuse, 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 | Littelfuse |
| 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 (min) | VBR | 20 | | | V | @ IT, test current 1 mA (VBR measured after IT applied for 300µs) | 2 |
| Breakdown Voltage VBR (max) | VBR | | | 22.1 | V | @ IT, test current 1 mA (VBR measured after IT applied for 300µs) | 2 |
| Reverse Stand-off Voltage VR | VR | | | 18 | V | Maximum voltage that can be applied without operation (datasheet definition of VR) | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR | 2 |
| Maximum Peak Pulse Current | Ipp | | | 13.7 | A | Surge current per 10/1000µs exponential waveform, derated per Fig.3 (table note 2) | 2 |
| Maximum Clamping Voltage | VC | | | 29.2 | V | @ Ipp | 2 |
| Peak Pulse Power Dissipation (8/20µs) | PPPM | | | 2000 | W | TA=25ºC, 8/20µs (Note 2); series-wide value | 1 |
| Peak Pulse Power Dissipation (10/1000µs) | PPPM | | | 400 | W | TA=25ºC, 10/1000µs (Note 3); series-wide value | 1 |
| Power Dissipation on Infinite Heat Sink | PD | | | 1 | W | at TL=50ºC | 1 |
| Operating and Storage Temperature Range | TJ,TSTG | -55 | | 150 | °C | | 1 |
| VBR Temperature Coefficient | αT | | 0.1 | | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)); typical value, series-wide (Features) | 1 |
| Thermal Resistance Junction to Ambient | RƟJA | | 220 | | °C/W | Junction to ambient | 1 |
| Thermal Resistance Junction to Lead | RƟJL | | 100 | | °C/W | Junction to lead | 1 |
## CAD (KiCad official)
- Symbol: `TPSMF4L18A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `tpsmf4l18a-etched.step` / `tpsmf4l18a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsmf4l18a.step` / `tpsmf4l18a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588942439293849600) (6 pp, sha256 `0538aa3240013aeb`, retrieved 2026-10-14, 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/tpsmf4l18a-datasheet.pdf)