# NUP5120X6T1G

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-563-6

NUP5120X6T1G from TECH PUBLIC, in a SOT-563-6. 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 pin on the bottom row of the diagram, with a steering diode toward the common rail shared with pin 2; ESD protection is rated ±20kV air and ±18kV contact per IEC 61000-4-2. |
| 2 | GND | power_in | Common rail pin in the center of the bottom row that the diode network returns to; the datasheet does not name it, and it is read as ground from the diagram. |
| 3 | IO2 | passive | Protected line pin on the bottom row of the diagram, with a steering diode toward the common rail shared with pin 2; working voltage is 5V maximum (VRWM). |
| 4 | IO3 | passive | Protected line pin on the top row of the diagram with a TVS diode to the common rail, clamping at 14V maximum at IPP = 4A (8/20µs). |
| 5 | IO4 | passive | Pin in the center of the top row with a TVS diode to the common rail at pin 2; junction capacitance is 10pF maximum at VR = 0V, f = 1MHz. |
| 6 | IO5 | passive | Protected line pin on the top row of the diagram with a TVS diode to the common rail, with breakdown voltage 6V minimum at IT = 1mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-563-6 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `NUP5120X6T1G`
- Footprint: `Package_TO_SOT_SMD:SOT-563`
- 3D model: SOT-563-6 (KiCad packages3D, STEP)
- 3D model files: `nup5120x6t1g-etched.step` / `nup5120x6t1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nup5120x6t1g.step` / `nup5120x6t1g.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/8589836541960368128) (4 pp, sha256 `7824b1f14815d004`, 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/nup5120x6t1g-datasheet.pdf)