# TPESD3V3U1UB

**TECH PUBLIC** · ESD Protection Devices · SOD-523

TPESD3V3U1UB from TECH PUBLIC, 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 | Pin 1 (diode terminal) | passive | One terminal of the uni-directional 1-line TVS diode; the datasheet references Pin 1 to Pin 2 for junction capacitance (0.5 pF typical, 0.9 pF maximum at VR = 0 V, f = 1 MHz). |
| 2 | Pin 2 (diode terminal) | passive | Other terminal of the uni-directional 1-line TVS diode; the datasheet references Pin 1 to Pin 2 for junction capacitance (0.5 pF typical, 0.9 pF maximum at VR = 0 V, f = 1 MHz), with a 3.3 V reverse working voltage and 14 V clamping voltage at Ipp = 4 A (8/20 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOD-523 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `TPESD3V3U1UB`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `tpesd3v3u1ub-etched.step` / `tpesd3v3u1ub-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpesd3v3u1ub.step` / `tpesd3v3u1ub.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tpesd3v3u1ub-datasheet.pdf) (4 pp, sha256 `6af4fb5868d509f4`, 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/tpesd3v3u1ub-datasheet.pdf)