component
ESD5621W-2
Public Made by Adomby adom
WILLSEMI Will Semicon ESD And Surge Protection (TVS/ESD), SOD-323F. 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
markdownESD5621W-2
WILLSEMI Will Semicon · ESD And Surge Protection (TVS/ESD) · SOD-323F
ESD5621W-2 from WILLSEMI Will Semicon, in a SOD-323F. 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 | One of the two terminals of this uni-directional TVS; the datasheet measures its clamping voltage and ESD ratings from pin 1 to pin 2, and the ESD5621W-2 (12 V class) has a reverse stand-off voltage VRWM of 12.0 V. |
| 2 | Pin2 | passive | The other terminal of this uni-directional TVS, serving as the reference for the pin 1 to pin 2 ratings, with reverse leakage IRM at most 0.1 µA at VRWM and junction capacitance of 300 pF typical and 400 pF maximum at 1 MHz, 0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | SOD-323F |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse standoff voltage | VRWM | 12 | V | 3 | |||
| Breakdown voltage | VBR | 13 | 15 | 17 | V | IBR = 1mA | 3 |
| Reverse leakage current | IRM | 0.1 | μA | at VRWM | 3 | ||
| Forward voltage | VF | 0.45 | 1.25 | V | IF = 20mA | 3 | |
| Junction capacitance | 300 | 400 | pF | F = 1MHz, VR =0V | 3 | ||
| Peak pulse power | Ppk | 1400 | W | tp=8/20μs | 2 | ||
| ESD according to IEC61000-4-2 air discharge | VESD | -30 | 30 | kV | IEC61000-4-2 air discharge | 2 | |
| ESD according to IEC61000-4-2 contact discharge | VESD | -30 | 30 | kV | IEC61000-4-2 contact discharge | 2 | |
| Junction temperature | TJ | 125 | oC | 2 | |||
| Operating temperature | TOP | -40 | 85 | oC | 2 | ||
| Lead temperature | TL | 260 | oC | 2 | |||
| Storage temperature | TSTG | -55 | 150 | oC | 2 |
CAD (KiCad official)
- Symbol:
ESD5621W-2 - Footprint:
Diode_SMD:D_SOD-323F - 3D model: SOD-323F (KiCad packages3D, STEP)
- 3D model files:
esd5621w-2-etched.step/esd5621w-2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esd5621w-2.step/esd5621w-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
fcc9b68db464cac6, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).