# CDSOT23-T03C

**BOURNS** · ESD And Surge Protection (TVS/ESD) · SOT-23

CDSOT23-T03C from BOURNS, in a SOT-23. 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/O 1 | passive | Bidirectional TVS channel terminal connected through one diode to common pin 3, protecting a line against ESD and surge with VWM 3.3 V (CDSOT23-T03C). |
| 2 | I/O 2 | passive | Bidirectional TVS channel terminal connected through the second diode to common pin 3, protecting a second line with VWM 3.3 V and 6.0 V min breakdown at 1 mA. |
| 3 | COMMON | passive | Common node of the two back-to-back TVS diodes in the bidirectional configuration, shared by pins 1 and 2 (typically referenced to ground). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `CDSOT23-T03C`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cdsot23-t03c-etched.step` / `cdsot23-t03c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cdsot23-t03c.step` / `cdsot23-t03c.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BOURNS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588938555648823296) (5 pp, sha256 `789e9bb8e9af3179`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cdsot23-t03c-datasheet.pdf)