component
SMF4L12CA
Public Made by Adomby adom
Littelfuse TVS, 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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SMF4L12CA
Littelfuse · TVS · SOD-123FL
SMF4L12CA 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 (bi-directional, SMF4L12CA) | VBR | 13.3 | 14.7 | V | @ IT = 1 mA; VBR measured after IT applied for 300µs | 2 | |
| Maximum Reverse Leakage | IR | 1 | µA | @ VR = 12 V | 2 | ||
| Maximum Peak Pulse Current | Ipp | 20.1 | A | 10/1000µs surge waveform (Note 2) | 2 | ||
| Maximum Clamping Voltage | VC | 19.9 | V | @ Ipp = 20.1 A, 10/1000µs surge waveform (Note 2) | 2 | ||
| Peak Pulse Power Dissipation (8/20µs) | PPPM | 2000 | W | 8/20µs (Note 2) | 1 | ||
| Peak Pulse Power Dissipation (10/1000µs) | PPPM | 400 | W | 10/1000µs (Note 3) | 1 | ||
| Operating and Storage Temperature Range | TJ,TSTG | -55 | 150 | °C | 1 | ||
| VBR Voltage Tolerance (suffix A) | VBR | -5 | 5 | % | Decoded from part-numbering table: 5% VBR voltage tolerance (suffix A) | 6 | |
| Power Dissipation on Infinite Heat Sink | PD | 1 | W | at TL = 50ºC | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 220 | °C/W | Junction to ambient | 1 | ||
| Thermal Resistance Junction to Lead | RθJL | 100 | °C/W | Junction to lead | 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 | • Matte tin lead-free plated • Halogen-free and RoHS | 1 |
CAD (KiCad official)
- Symbol:
SMF4L12CA - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
smf4l12ca-etched.step/smf4l12ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smf4l12ca.step/smf4l12ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
7971ab636790fc84, 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).
# SMF4L12CA
**Littelfuse** · TVS · SOD-123FL
SMF4L12CA 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 (bi-directional, SMF4L12CA) | VBR | 13.3 | | 14.7 | V | @ IT = 1 mA; VBR measured after IT applied for 300µs | 2 |
| Maximum Reverse Leakage | IR | | | 1 | µA | @ VR = 12 V | 2 |
| Maximum Peak Pulse Current | Ipp | | | 20.1 | A | 10/1000µs surge waveform (Note 2) | 2 |
| Maximum Clamping Voltage | VC | | | 19.9 | V | @ Ipp = 20.1 A, 10/1000µs surge waveform (Note 2) | 2 |
| Peak Pulse Power Dissipation (8/20µs) | PPPM | | | 2000 | W | 8/20µs (Note 2) | 1 |
| Peak Pulse Power Dissipation (10/1000µs) | PPPM | | | 400 | W | 10/1000µs (Note 3) | 1 |
| Operating and Storage Temperature Range | TJ,TSTG | -55 | | 150 | °C | | 1 |
| VBR Voltage Tolerance (suffix A) | VBR | -5 | | 5 | % | Decoded from part-numbering table: 5% VBR voltage tolerance (suffix A) | 6 |
| Power Dissipation on Infinite Heat Sink | PD | | 1 | | W | at TL = 50ºC | 1 |
| Thermal Resistance Junction to Ambient | RθJA | | 220 | | °C/W | Junction to ambient | 1 |
| Thermal Resistance Junction to Lead | RθJL | | 100 | | °C/W | Junction to lead | 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 | • Matte tin lead-free plated • Halogen-free and RoHS | 1 |
## CAD (KiCad official)
- Symbol: `SMF4L12CA`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `smf4l12ca-etched.step` / `smf4l12ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smf4l12ca.step` / `smf4l12ca.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](docs/smf4l12ca-datasheet.pdf) (6 pp, sha256 `7971ab636790fc84`, retrieved 2026-10-22, 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/smf4l12ca-datasheet.pdf)