# CPDT-12V-HF

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

CPDT-12V-HF from Comchip, 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 | K1 | passive | Cathode of the first ESD protection diode (protected line); breakdown voltage 13 V min at IR = 1 mA, clamping voltage 25 V max at IPP = 1 A (8/20 us). |
| 2 | K2 | passive | Cathode of the second ESD protection diode (protected line); breakdown voltage 13 V min at IR = 1 mA, clamping voltage 25 V max at IPP = 1 A (8/20 us). |
| 3 | A | passive | Common anode of both ESD protection diodes, shared return for the two protected lines (IEC 61000-4-2 ESD capability 16 kV air, 8 kV contact). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CPDT-12V-HF`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cpdt-12v-hf-etched.step` / `cpdt-12v-hf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cpdt-12v-hf.step` / `cpdt-12v-hf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Comchip datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8583613307308032000) (4 pp, sha256 `e7de29c7ebbb10eb`, 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/cpdt-12v-hf-datasheet.pdf)