# TPE3662BC3

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-323

TPE3662BC3 from TECH PUBLIC, in a SOT-323. 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 | Protected line 1 (CAN bus line) with a TVS diode to common pin 3; reverse working voltage 36V max, breakdown 38V min at 1mA. |
| 2 | IO2 | passive | Protected line 2 (CAN bus line) with a TVS diode to common pin 3; reverse working voltage 36V max, breakdown 38V min at 1mA. |
| 3 | GND | power_in | Common pin joining both TVS diodes, the ground reference for IO1 and IO2; the datasheet labels it only PIN 3 and refers to 'IO to GND' capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-323 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TPE3662BC3`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `tpe3662bc3-etched.step` / `tpe3662bc3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpe3662bc3.step` / `tpe3662bc3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603133336785068032) (4 pp, sha256 `e11f78f754dc2eae`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/tpe3662bc3-datasheet.pdf)