# NUP2128WTT1G

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

NUP2128WTT1G 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 | PIN 1 | passive | Protected line 1 (diode channel 1 to common pin 3); operating voltage 24V (VRWM max 24 V), ±30kV air/contact ESD per IEC 61000-4-2. |
| 2 | PIN 2 | passive | Protected line 2 (diode channel 2 to common pin 3); operating voltage 24V (VRWM max 24 V), ±30kV air/contact ESD per IEC 61000-4-2. |
| 3 | PIN 3 | passive | Common pin joining the two back-to-back TVS diode channels from pins 1 and 2 as shown in the schematic. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `NUP2128WTT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `nup2128wtt1g-etched.step` / `nup2128wtt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nup2128wtt1g.step` / `nup2128wtt1g.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/8604436233229508608) (4 pp, sha256 `31b04b1eb59a9150`, 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/nup2128wtt1g-datasheet.pdf)