component
ESD56181W04-2
Public Made by Adomby adom
WILLSEMI Will Semicon ESD And Surge Protection (TVS/ESD), SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownESD56181W04-2
WILLSEMI Will Semicon · ESD And Surge Protection (TVS/ESD) · SOD-323
ESD56181W04-2 from WILLSEMI Will Semicon, 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 | Pin1 | passive | Unidirectional TVS terminal (cathode side of the circuit diagram) for the 4.5V reverse stand-off device (VRWM 4.5V, VBR 5.2-6.2V at 1mA), protecting a power line; datasheet measures electrical characteristics from pin 1 to pin 2. |
| 2 | Pin2 | passive | Unidirectional TVS terminal (anode side of the circuit diagram) for the 4.5V reverse stand-off device, rated for 1800W peak pulse power (8/20us) and ±30kV IEC61000-4-2 ESD, used as the return/ground side of the protected line. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| 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 | Ppk | 1800 | W | tp = 8/20μs | 2 | ||
| ESD air discharge | VESD | -30 | 30 | kV | IEC61000-4-2 air discharge | 2 | |
| ESD contact discharge | VESD | -30 | 30 | kV | IEC61000-4-2 contact discharge | 2 | |
| Junction temperature | TJ | 125 | °C | 2 | |||
| Operating temperature | TOP | -40 | 85 | °C | 2 | ||
| Lead temperature | TL | 260 | °C | 2 | |||
| Storage temperature | TSTG | -55 | 150 | °C | 2 | ||
| Reverse stand-off voltage | VRWM | 4.5 | V | TA = 25°C | 3 | ||
| Breakdown voltage | VBR | 5.2 | 5.7 | 6.2 | V | IBR = 1mA | 3 |
| Reverse leakage current | IRM | 2 | μA | at VRWM | 3 | ||
| Forward voltage | VF | 0.6 | 1.1 | V | IF = 20mA | 3 | |
| Junction capacitance | Cj | 1100 | 1200 | pF | F = 1MHz, VR=0V | 3 | |
| Rated peak pulse current | IPP | 110 | A | 8/20μs, non-repetitive, IEC61000-4-5 | 3 | ||
| Clamping voltage | VCL | 12.5 | 15 | V | at IPP, non-repetitive current pulse | 3 |
CAD (KiCad official)
- Symbol:
ESD56181W04-2 - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
esd56181w04-2-etched.step/esd56181w04-2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esd56181w04-2.step/esd56181w04-2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI Will Semicon datasheet (6 pp, sha256
9e4b9602fac075e5, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(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).