# MSESD5D3V3C

**MSKSEMI** · ESD And Surge Protection (TVS/ESD) · SOD-523

MSESD5D3V3C from MSKSEMI, in a SOD-523. 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 | A1 | passive | Bidirectional TVS terminal 1 (protected line side), 3.3 V max working voltage (VRWM), 200 W peak pulse power at 8/20 µs, ±15 kV air / ±8 kV contact IEC61000-4-2. |
| 2 | A2 | passive | Bidirectional TVS terminal 2 (second line or ground side), 3.3 V max working voltage (VRWM), 200 W peak pulse power at 8/20 µs, ±15 kV air / ±8 kV contact IEC61000-4-2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOD-523 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `MSESD5D3V3C`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `msesd5d3v3c-etched.step` / `msesd5d3v3c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msesd5d3v3c.step` / `msesd5d3v3c.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588943202045214720) (5 pp, sha256 `6577e014fb79a535`, retrieved 2026-10-13, 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/msesd5d3v3c-datasheet.pdf)