# TS0421LEX

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

TS0421LEX from Shenzhen JingYang, 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 | I/O_1 | bidirectional | Bidirectional TVS terminal on the protected line, rated for a nominal reverse working voltage VRWM of 4.5 V and a peak pulse current of 175 A (8/20 µs). |
| 2 | I/O_2 | bidirectional | Bidirectional TVS terminal on the protected line, rated for ESD per IEC 61000-4-2 of ±30 kV (air) and ±30 kV (contact) as the other side of the single protected I/O line. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Current (8/20us) | IPP |  |  | 175 | A | Peak Pulse Current (8/20us) | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | kV | ESD per IEC 61000-4-2 (Air) | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | kV | ESD per IEC 61000-4-2 (Contact) | 2 |
| Operating Temperature | TOPT | -55 |  | 150 | °C | Operating Temperature | 2 |
| Storage Temperature | TSTG | -55 |  | 150 | °C | Storage Temperature | 2 |
| Lead Soldering Temperature | TL |  |  | 260 | °C | 10 sec. | 2 |
| Reverse Leakage Current @ VRWM | IR |  | 0.01 | 0.1 | μA | VRWM = 4.5V, T = 25C | 2 |
| Nominal Reverse Working Voltage | VRWM |  | 4.5 |  | V |  | 2 |
| Trigger Voltage | Vt1 | 6 |  |  | V | It1 = 1μA | 2 |

## CAD (KiCad official)

- Symbol: `TS0421LEX`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ts0421lex-etched.step` / `ts0421lex-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ts0421lex.step` / `ts0421lex.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen JingYang datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590907284757700608) (6 pp, sha256 `02c0a57b7218885d`, retrieved 2026-10-29, 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/ts0421lex-datasheet.pdf)