# CESD5V0J4

**Leiditech** · ESD Protection Devices · SOT-353

CESD5V0J4 from Leiditech, in a SOT-353. 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/O1 | passive | Protected line, connected to the lower steering diode of the left channel in the pin configuration drawing; part is rated for 5V reverse working voltage and ±30kV air / ±25kV contact ESD per IEC 61000-4-2. |
| 2 | GND | power_in | Common node of the diode array, where the middle node of both channels joins in the pin configuration drawing; reference or ground connection for the ESD protection. |
| 3 | I/O2 | passive | Protected line, connected to the lower steering diode of the right channel in the pin configuration drawing; part is rated for 5V reverse working voltage and ±30kV air / ±25kV contact ESD per IEC 61000-4-2. |
| 4 | I/O3 | passive | Protected line, connected to the upper Zener diode of the right channel in the pin configuration drawing; part is rated for 5V reverse working voltage and ±30kV air / ±25kV contact ESD per IEC 61000-4-2. |
| 5 | I/O4 | passive | Protected line, connected to the upper Zener diode of the left channel in the pin configuration drawing; part is rated for 5V reverse working voltage and ±30kV air / ±25kV contact ESD per IEC 61000-4-2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOT-353 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 5 |

## 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 Working Voltage | VRWM |  |  | 5 | V |  | 2 |
| Breakdown Voltage | VBR | 6.1 |  |  | V | IT = 1mA | 2 |
| Reverse Leakage Current | IR |  |  | 1 | µA | VRWM = 5V | 2 |
| Clamping Voltage | VC |  |  | 15 | V | IPP = 1A (8 x 20 µs pulse) | 2 |
| Clamping Voltage | VC |  |  | 20 | V | IPP = 6A (8 x 20 µs pulse) | 2 |
| Junction Capacitance | CJ |  |  | 90 | pF | V = 0V, f = 1MHz | 2 |
| Peak Pulse Power (8/20µs) | Ppp |  |  | 150 | W | 8/20µs | 1 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | Kv | IEC 61000-4-2 air discharge | 1 |
| ESD per IEC 61000-4-2 (Contact) |  | -25 |  | 25 | Kv | IEC 61000-4-2 contact discharge | 1 |
| Operating Temperature Range | TJ | -40 |  | 125 | ℃ |  | 1 |
| Storage Temperature Range | TSTJ | -40 |  | 125 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `CESD5V0J4`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SOT-353 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Leiditech datasheet](docs/cesd5v0j4-datasheet.pdf) (4 pp, sha256 `3907aa33c2dbf325`, retrieved 2026-11-04, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/cesd5v0j4-datasheet.pdf)