component
ESD0521C
Public Made by Adomby adom
Leiditech ESD And Surge Protection (TVS/ESD), 0201. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ESD0521C
Leiditech · ESD And Surge Protection (TVS/ESD) · 0201
ESD0521C from Leiditech, in a 0201. 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 | 1 | passive | One terminal of the 1-line bi-directional TVS diode (the chamfered pad in the drawing), which protects one data or power line at 5V VRWM. |
| 2 | 2 | passive | Second terminal of the bi-directional TVS diode, interchangeable with the other pad, with 5V reverse working voltage and ±25kV air / ±22kV contact ESD rating. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | 0201 |
| Category | Circuit Protection |
| Pins | 2 |
CAD (KiCad official)
- Symbol:
ESD0521C - Footprint:
Diode_SMD:D_0201_0603Metric - 3D model: 0201, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.3 mm nominal 01005 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
esd0521c-etched.step/esd0521c-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esd0521c.step/esd0521c.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Leiditech datasheet (4 pp, sha256
dac1b03ec0f87655, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# ESD0521C
**Leiditech** · ESD And Surge Protection (TVS/ESD) · 0201
ESD0521C from Leiditech, in a 0201. 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 | 1 | passive | One terminal of the 1-line bi-directional TVS diode (the chamfered pad in the drawing), which protects one data or power line at 5V VRWM. |
| 2 | 2 | passive | Second terminal of the bi-directional TVS diode, interchangeable with the other pad, with 5V reverse working voltage and ±25kV air / ±22kV contact ESD rating. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | 0201 |
| Category | Circuit Protection |
| Pins | 2 |
## CAD (KiCad official)
- Symbol: `ESD0521C`
- Footprint: `Diode_SMD:D_0201_0603Metric`
- 3D model: 0201, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.3 mm nominal _01005_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `esd0521c-etched.step` / `esd0521c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd0521c.step` / `esd0521c.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Leiditech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757978351611199488) (4 pp, sha256 `dac1b03ec0f87655`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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).
[Datasheet PDF](docs/esd0521c-datasheet.pdf)