component
P4SMA18CA
Public Made by Adomby adom
Littelfuse TVS, DO-214AC. 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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P4SMA18CA
Littelfuse · TVS · DO-214AC
P4SMA18CA from Littelfuse, in a DO-214AC. 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 | DO-214AC |
| 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), P4SMA18CA row, min and max | VBR | 17.1 | 18.9 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 25.5 | V | @ Ipp | 2 | ||
| Maximum Peak Pulse Current | Ipp | 16.1 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR | 2 | ||
| Maximum Temperature Coefficient of VBR | 0.083 | %/C | 2 | ||||
| Peak Pulse Power Dissipation | PPPM | 400 | W | TA=25ºC by 10/1000µs Waveform (Fig.2) | 1 | ||
| Power Dissipation on Infinite Heat Sink | PD | 3.3 | W | at TL=50ºC | 1 | ||
| Peak Forward Surge Current | IFSM | 60 | A | 8.3ms Single Half Sine Wave (Note 3) | 1 | ||
| Operating Temperature Range | TJ | -65 | 150 | °C | 1 | ||
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 30 | °C/W | Typical | 1 | ||
| Typical Thermal Resistance Junction to Ambient | RθJA | 120 | °C/W | Typical | 1 | ||
| Temperature Coefficient of Breakdown Voltage (αT) | αT | 0.1 | % | Typical value, used in VBR@TJ = VBR@25°C x (1+αT x (TJ - 25)) | 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:
P4SMA18CA - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC (KiCad packages3D, STEP)
- 3D model files:
p4sma18ca-etched.step/p4sma18ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);p4sma18ca.step/p4sma18ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
852b4d7b8018f3b1, 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).
# P4SMA18CA
**Littelfuse** · TVS · DO-214AC
P4SMA18CA from Littelfuse, in a DO-214AC. 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 | DO-214AC |
| 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), P4SMA18CA row, min and max | VBR | 17.1 | | 18.9 | V | @ IT = 1 mA | 2 |
| Maximum Clamping Voltage | VC | | | 25.5 | V | @ Ipp | 2 |
| Maximum Peak Pulse Current | Ipp | | | 16.1 | A | | 2 |
| Maximum Reverse Leakage Current | IR | | | 1 | µA | @ VR | 2 |
| Maximum Temperature Coefficient of VBR | | | | 0.083 | %/C | | 2 |
| Peak Pulse Power Dissipation | PPPM | | | 400 | W | TA=25ºC by 10/1000µs Waveform (Fig.2) | 1 |
| Power Dissipation on Infinite Heat Sink | PD | | | 3.3 | W | at TL=50ºC | 1 |
| Peak Forward Surge Current | IFSM | | | 60 | A | 8.3ms Single Half Sine Wave (Note 3) | 1 |
| Operating Temperature Range | TJ | -65 | | 150 | °C | | 1 |
| Storage Temperature Range | TSTG | -65 | | 175 | °C | | 1 |
| Typical Thermal Resistance Junction to Lead | RθJL | | 30 | | °C/W | Typical | 1 |
| Typical Thermal Resistance Junction to Ambient | RθJA | | 120 | | °C/W | Typical | 1 |
| Temperature Coefficient of Breakdown Voltage (αT) | αT | | 0.1 | | % | Typical value, used in VBR@TJ = VBR@25°C x (1+αT x (TJ - 25)) | 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: `P4SMA18CA`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC (KiCad packages3D, STEP)
- 3D model files: `p4sma18ca-etched.step` / `p4sma18ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p4sma18ca.step` / `p4sma18ca.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Littelfuse datasheet](docs/p4sma18ca-datasheet.pdf) (6 pp, sha256 `852b4d7b8018f3b1`, retrieved 2026-10-21, 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/p4sma18ca-datasheet.pdf)