# PESD2IVN27U-QX

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

PESD2IVN27U-QX from Nexperia, 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 | K1 | passive | Cathode of diode 1, one of the two protected bus lines; the datasheet measures clamping voltage from pin 1 to pin 3 (VCL = 36 V typical at IPPM = 3 A, tp = 8/20 µs). |
| 2 | K2 | passive | Cathode of diode 2, the second protected bus line; the datasheet measures clamping voltage from pin 2 to pin 3 (same test conditions as pin 1). |
| 3 | K | passive | Common cathode shared by both ESD protection diodes, serving as the reference terminal for the clamping measurements on pins 1 and 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| breakdown voltage | VBR | 28 | 33 | 38 | V | IR = 10 mA; Tamb = 25 °C | 4 |
| reverse standoff voltage | VRWM |  |  | 27 | V | Tamb = 25 °C | 4 |
| reverse leakage current | IRM |  | 1 | 50 | nA | VRWM = 27 V; Tamb = 25 °C | 4 |
| diode capacitance | Cd |  | 14 | 17 | pF | f = 1 MHz; VR = 0 V; Tamb = 25 °C | 4 |
| clamping voltage | VCL |  | 34 | 43 | V | IPPM = 1 A; tp = 8/20 µs; Tamb = 25 °C | 4 |
| clamping voltage | VCL |  | 36 | 45 | V | IPPM = 3 A; tp = 8/20 µs; Tamb = 25 °C | 4 |
| rated peak pulse current | IPPM |  |  | 3 | A | tp = 8/20 µs | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| electrostatic discharge voltage (ESD maximum rating) | VESD |  |  | 30 | kV | IEC 61000-4-2; contact discharge | 3 |
| clamping voltage | VCL |  | 35 |  | V | IPP = 16 A; Tp = TLP; Tamb = 25 °C | 4 |
| dynamic resistance | Rdyn |  | 0.2 |  | Ω | IR = 10 A; Tamb = 25 °C | 4 |

## CAD (KiCad official)

- Symbol: `PESD2IVN27U-QX`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `pesd2ivn27u-qx-etched.step` / `pesd2ivn27u-qx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd2ivn27u-qx.step` / `pesd2ivn27u-qx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604330348985659392) (12 pp, sha256 `c7dd9a1b8837783a`, retrieved 2026-10-18, tier: lcsc)
- **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/pesd2ivn27u-qx-datasheet.pdf)