# ESD05V14T

**DOWO** · ESD And Surge Protection (TVS/ESD) · SOT-143

ESD05V14T from DOWO, in a SOT-143. 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 | GND | power_in | Ground reference connected to the anode side of the internal TVS diode, used for I/O-GND and VCC-GND clamping (50 W/4 A I/O-GND, 8/20µs). |
| 2 | I/O1 | passive | Protected line 1 steering-diode node, uni-directional with 5V working voltage, 0.6pF (typ. 0.6 to 0.9pF max) I/O-GND capacitance and IEC 61000-4-2 ±15kV contact / ±20kV air. |
| 3 | I/O2 | passive | Protected line 2 steering-diode node, uni-directional with 5V working voltage, 0.6pF (typ. 0.6 to 0.9pF max) I/O-GND capacitance and IEC 61000-4-2 ±15kV contact / ±20kV air. |
| 4 | VCC | power_in | Supply-rail side of the internal TVS diode (cathode), with VCC-GND breakdown 6 to 9V at 1mA and 240W/15A peak pulse rating (8/20µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |

## 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 Power (8/20µs, I/O-GND) | Ppk |  |  | 50 | W | 8/20µs, I/O-GND | 2 |
| Peak Pulse Power (8/20µs, Vcc-GND) | Ppk |  |  | 240 | W | 8/20µs, Vcc-GND | 2 |
| Peak Pulse Current (8/20µs, I/O-GND) | IPP |  |  | 4 | A | 8/20µs, I/O-GND | 2 |
| Peak Pulse Current (8/20µs, Vcc-GND) | IPP |  |  | 15 | A | 8/20µs, Vcc-GND | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD,VDD | -20 |  | 20 | kV | IEC 61000-4-2 (Air), printed ±20 kV | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD,I/O | -15 |  | 15 | kV | IEC 61000-4-2 (Contact), printed ±15 kV | 2 |
| Operating Temperature Range | TJ |  |  | 150 | °C |  | 2 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 2 |
| Reverse Working Voltage | VRWM |  |  | 5 | V | I/O-GND | 2 |
| Breakdown Voltage (I/O-GND) | VBR | 6 | 7 | 9 | V | IT = 1mA, I/O-GND | 2 |
| Breakdown Voltage (VCC-GND) | VBR | 6 | 7.2 | 9 | V | IT = 1mA, VCC-GND | 2 |
| Reverse Leakage Current | IR |  |  | 1 | µA | VRWM = 5V | 2 |
| Clamping Voltage (I/O-GND) | VC |  | 14 | 16 | V | IPP = 4A (8 x 20µs pulse), I/O-GND | 2 |
| Clamping Voltage (VCC-GND) | VC |  | 15 | 17 | V | IPP = 15A (8 x 20µs pulse), VCC-GND | 2 |
| Junction Capacitance (I/O-I/O) | CJ |  | 0.3 | 0.5 | pF | VR = 0V, f = 1MHz, I/O-I/O | 2 |
| Junction Capacitance (I/O-GND) | CJ |  | 0.6 | 0.9 | pF | VR = 0V, f = 1MHz, I/O-GND | 2 |

## CAD (KiCad official)

- Symbol: `ESD05V14T`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files: `esd05v14t-etched.step` / `esd05v14t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd05v14t.step` / `esd05v14t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DOWO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603330577718530048) (4 pp, sha256 `0596a862b1e2d4bc`, retrieved 2026-10-18, 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/esd05v14t-datasheet.pdf)