# PESD12VS1UA

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

PESD12VS1UA from Nexperia, in a SOD-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 the unidirectional TVS diode, identified by the marking band, connected to the protected signal line (VRWM 12 V max, VBR 13.3 V to 15.75 V at IR = 5 mA). |
| 2 | A | passive | Anode of the unidirectional TVS diode, connected to ground (GND) in the application diagram for positive signal polarity lines. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-323 |
| Category | Circuit Protection |
| Pins | 2 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| rated peak pulse power | PPPM |  |  | 600 | W |  | 3 |
| rated peak pulse current | IPPM |  |  | 22.5 | A | tp = 8/20 µs | 3 |
| total power dissipation | Ptot |  |  | 360 | mW | Tamb ≤ 25 °C | 3 |
| total power dissipation | Ptot |  |  | 500 | mW |  | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| electrostatic discharge voltage, IEC 61000-4-2 contact discharge | VESD |  |  | 30 | kV | IEC 61000-4-2; contact discharge; Tamb = 25 °C | 3 |
| electrostatic discharge voltage, IEC 61000-4-2 air discharge | VESD |  |  | 15 | kV | IEC 61000-4-2; air discharge | 3 |
| electrostatic discharge voltage, machine model | VESD |  |  | 400 | V | machine model; Tamb = 25 °C | 3 |
| electrostatic discharge voltage, MIL-STD-883 human body model | VESD |  |  | 16 | kV | MIL-STD-883 (human body model); Tamb = 25 °C | 3 |
| thermal resistance junction to ambient | Rth(j-a) |  |  | 345 | K/W | in free air | 4 |
| thermal resistance junction to ambient | Rth(j-a) |  |  | 250 | K/W |  | 4 |
| thermal resistance junction to solder point | Rth(j-sp) |  |  | 90 | K/W |  | 4 |
| reverse standoff voltage | VRWM |  |  | 12 | V | Tamb = 25 °C | 5 |
| breakdown voltage | VBR | 13.3 | 14.5 | 15.75 | V | IR = 5 mA; Tamb = 25 °C | 5 |
| reverse leakage current | IRM |  | 1 | 100 | nA | VRWM = 12 V; Tamb = 25 °C | 5 |
| diode capacitance | Cd |  | 160 | 180 | pF | f = 1 MHz; VR = 0 V; Tamb = 25 °C | 5 |
| clamping voltage | VCL |  |  | 27 | V | IPPM = 22.5 A; Tamb = 25 °C | 5 |
| clamping voltage | VCL |  |  | 23.5 | V | IPP = 15 A; Tamb = 25 °C | 5 |
| clamping voltage | VCL |  |  | 19 | V | IPP = 5 A; Tamb = 25 °C | 5 |
| differential resistance | Rdiff |  | 5 | 100 | Ω | IR = 5 mA; Tamb = 25 °C | 5 |

## CAD (KiCad official)

- Symbol: `PESD12VS1UA`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `pesd12vs1ua-etched.step` / `pesd12vs1ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd12vs1ua.step` / `pesd12vs1ua.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/PESD12VS1UA.pdf) (13 pp, sha256 `adf9db7d6cda310b`, retrieved 2026-11-06, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/pesd12vs1ua-datasheet.pdf)