WPE4581VD3
Public Made by Adomby adom
WPMtek(Wei Pan Microelectronics) ESD And Surge Protection (TVS/ESD), SOD-323. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownWPE4581VD3
WPMtek(Wei Pan Microelectronics) · ESD And Surge Protection (TVS/ESD) · SOD-323
WPE4581VD3 from WPMtek(Wei Pan Microelectronics), in a SOD-323. 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 | WPMtek(Wei Pan Microelectronics) |
| Package | SOD-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power (8/20µs) | Ppk | 2400 | W | 8/20µs | 2 | ||
| Peak Pulse Current (8/20µs) | Ipp | 140 | A | 8/20µs | 2 | ||
| ESD per IEC 61000-4-2 (Air) | VESD | -30 | 30 | kV | IEC 61000-4-2 air discharge | 2 | |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 | 30 | kV | IEC 61000-4-2 contact discharge | 2 | |
| Operating Temperature Range | TJ | -55 | 125 | °C | 2 | ||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 2 | ||
| Reverse Working Voltage | VRWM | 4.5 | V | 2 | |||
| Breakdown Voltage | VBR | 4.7 | V | IT = 1mA | 2 | ||
| Reverse Leakage Current | IR | 1 | μA | VRWM = 4.5V | 2 | ||
| Clamping Voltage | VC | 7.5 | V | IPP = 20A (8 x 20µs pulse) | 2 | ||
| Clamping Voltage | VC | 17 | V | IPP = 140A (8 x 20µs pulse) | 2 | ||
| Junction Capacitance | CJ | 300 | pF | VR = 0V, f = 1MHz | 2 |
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 | Lead Finish: Matte Tin Case Material: “Green” Molding Compound. UL Flammability Classification Rating 94V-0 | 1 |
CAD (KiCad official)
- Symbol:
WPE4581VD3 - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
wpe4581vd3-etched.step/wpe4581vd3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wpe4581vd3.step/wpe4581vd3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WPMtek(Wei Pan Microelectronics) datasheet (5 pp, sha256
3d4a3b5c40878524, retrieved 2026-10-27, 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).