# ESD5Z3.3C-ES

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

ESD5Z3.3C-ES from ElecSuper, 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 | IO1 | passive | Connect to the IO line to be protected; the bi-directional ESD clamp is rated for a 3.3 V peak reverse working voltage (VRWM). |
| 2 | IO2 | passive | Connect to the IO line to be protected; the bi-directional ESD clamp is rated for a 3.3 V peak reverse working voltage (VRWM). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `ESD5Z3.3C-ES`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `esd5z3-3c-es-etched.step` / `esd5z3-3c-es-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5z3-3c-es.step` / `esd5z3-3c-es.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ElecSuper datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590420743076020224) (6 pp, sha256 `6747a4eef87ff386`, retrieved 2026-10-12, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/esd5z3-3c-es-datasheet.pdf)