# PTVSHC3D18VU

**Shanghai Prisemi Elec** · ESD And Surge Protection (TVS/ESD) · SOD-323

PTVSHC3D18VU from Shanghai Prisemi Elec, 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 | Pin1 | passive | Unidirectional TVS terminal (cathode side per PCB guidance, placed directly on the protected signal trace) with 18V peak reverse working voltage, 20-23V breakdown at 1mA. |
| 2 | Pin2 | passive | Unidirectional TVS terminal (anode side per PCB guidance, connected to ground through close, low-inductance vias) for 1200W peak pulse power (8/20μs) protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Prisemi Elec |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 20 | 21.5 | 23 | V | It =1mA | 2 |
| Clamping Voltage | VC |  | 25 | 30 | V | IPP=1A tP = 8/20μs | 2 |
| Clamping Voltage | VC |  | 43 | 47 | V | IPP=30A tP = 8/20μs | 2 |
| Junction Capacitance | Cj |  | 250 | 350 | pF | VR=0V f = 1MHz | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM =18V | 2 |
| Peak Reverse Working Voltage | VRWM |  | 18 |  | V |  | 2 |
| Peak Pulse Power | Ppp |  |  | 1200 | W | tP = 8/20μS | 2 |
| Operating Temperature | TJ | -55 |  | 125 | ℃ |  | 2 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 2 |
| Lead Soldering Temperature | TL |  |  | 260 | ℃ | 10 sec | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin |  Lead finish:100% matte Sn(Tin)  Mounting position: Any | 1 |

## CAD (KiCad official)

- Symbol: `PTVSHC3D18VU`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ptvshc3d18vu-etched.step` / `ptvshc3d18vu-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ptvshc3d18vu.step` / `ptvshc3d18vu.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Prisemi Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586189551069380608) (6 pp, sha256 `28f668265c43fafc`, retrieved 2026-11-06, tier: lcsc)
- **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/ptvshc3d18vu-datasheet.pdf)