# CESDLC3V0J4

**Changjing** · ESD And Surge Protection (TVS/ESD) · SOT-353

CESDLC3V0J4 from Changjing, in a SOT-353. 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 | I/O1 | passive | ESD-protected line 1 (uni-directional channel, I/O to GND), 3V reverse stand-off, 9 pF typical capacitance. |
| 2 | GND | power_in | Common ground reference for all four protected channels (ESD ratings are specified per channel I/O to GND). |
| 3 | I/O2 | passive | ESD-protected line 2 (uni-directional channel, I/O to GND), 3V reverse stand-off, 9 pF typical capacitance. |
| 4 | I/O3 | passive | ESD-protected line 3 (uni-directional channel, I/O to GND), 3V reverse stand-off, 9 pF typical capacitance. |
| 5 | I/O4 | passive | ESD-protected line 4 (uni-directional channel, I/O to GND), 3V reverse stand-off, 9 pF typical capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-353 |
| Category | Circuit Protection |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `CESDLC3V0J4`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files: `cesdlc3v0j4-etched.step` / `cesdlc3v0j4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cesdlc3v0j4.step` / `cesdlc3v0j4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884159565058048) (6 pp, sha256 `52a6e4c58c1ac710`, 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/cesdlc3v0j4-datasheet.pdf)