# PESD3V3U1UT

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

PESD3V3U1UT from Nexperia, 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 ESD protection diode; diode capacitance Cd is specified from pin 1 to pin 2 (0.6 pF typ, 1.5 pF max at f = 1 MHz, VR = 0 V). |
| 2 | K2 | passive | Cathode of the compensation diode, which combined with the ESD diode gives the ultra low device capacitance. |
| 3 | CA | passive | Common anode shared by the ESD protection and compensation diodes; the datasheet states pin 3 is not connected in the two-device anti-parallel applications (Figs. 6 and 7). |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| reverse standoff voltage | VRWM |  |  | 3.3 | V | Tamb = 25 °C | 4 |
| breakdown voltage | VBR | 5.8 | 6.4 | 6.9 | V | IR = 5 mA; Tamb = 25 °C | 4 |
| reverse leakage current | IRM |  | 0.25 | 2 | µA | VRWM = 3.3 V; Tamb = 25 °C | 4 |
| diode capacitance | Cd |  | 0.6 | 1.5 | pF | f = 1 MHz; VR = 0 V; Tamb = 25 °C | 4 |
| clamping voltage (IPP = 1 A) | VCL |  |  | 9 | V | IPP = 1 A; Tamb = 25 °C | 4 |
| clamping voltage (IPPM = 5 A) | VCL |  |  | 20 | V | IPPM = 5 A; Tamb = 25 °C | 4 |
| differential resistance | Rdiff |  |  | 400 | Ω | IR = 1 mA; Tamb = 25 °C | 4 |
| rated peak pulse power | PPPM |  |  | 80 | W |  | 3 |
| rated peak pulse current | IPPM |  |  | 5 | A | tp = 8/20 µs | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -65 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| electrostatic discharge voltage, contact discharge | VESD |  |  | 30 | kV | IEC 61000-4-2; contact discharge | 3 |
| electrostatic discharge voltage, air discharge | VESD |  |  | 15 | kV | IEC 61000-4-2; air discharge | 3 |
| electrostatic discharge voltage, human body model | VESD |  |  | 10 | kV | MIL-STD-883; human body model (HBM) | 3 |

## CAD (KiCad official)

- Symbol: `PESD3V3U1UT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `pesd3v3u1ut-etched.step` / `pesd3v3u1ut-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd3v3u1ut.step` / `pesd3v3u1ut.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/PESD3V3U1UT.pdf) (11 pp, sha256 `ca78656bfd04102e`, retrieved 2026-10-13, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/pesd3v3u1ut-datasheet.pdf)