# ESDU5V0K4

**UMW** · ESD And Surge Protection (TVS/ESD) · SOT-363

ESDU5V0K4 from UMW, in a SOT-363. 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 | bidirectional | ESD-protected bidirectional line whose clamp is referenced to GND, with 0.8 pF maximum junction capacitance per channel (I/O to GND). |
| 2 | GND | power_in | Ground reference for all ESD clamps; per-channel reverse stand-off, breakdown and clamping limits are specified to GND. |
| 3 | I/O3 | bidirectional | ESD-protected bidirectional line whose clamp is referenced to GND, with 0.8 pF maximum junction capacitance per channel (I/O to GND). |
| 4 | I/O4 | bidirectional | ESD-protected bidirectional line whose clamp is referenced to GND, with 0.8 pF maximum junction capacitance per channel (I/O to GND). |
| 5 | VCC | power_in | Supply-side pin with its own ESD clamp; the datasheet gives reverse stand-off of 5 V (VRWM) for VCC to GND. |
| 6 | I/O2 | bidirectional | ESD-protected bidirectional line whose clamp is referenced to GND, with 0.8 pF maximum junction capacitance per channel (I/O to GND). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-363 |
| Category | Circuit Protection |
| Pins | 6 |

## 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 stand-off voltage | VRWM |  |  | 5 | V |  | 3 |
| Breakdown voltage | V(BR) | 5.8 |  | 6.5 | V | IT=1mA | 3 |
| Junction capacitance (I/O to GND) | CJ |  |  | 0.8 | pF | VR=0V, f=1MHz | 3 |
| IEC 61000-4-2 ESD voltage, air model | VESD | -25 |  | 25 | kV | IEC 61000-4-2, air model | 2 |
| IEC 61000-4-2 ESD voltage, contact model | VESD | -25 |  | 25 | kV | IEC 61000-4-2, contact model | 2 |
| ESD voltage, human body model | VESD | -16 |  | 16 | kV | JESD22-A114-B, human body model | 2 |
| ESD voltage, machine model | VESD | -0.4 |  | 0.4 | kV | machine model | 2 |
| Peak pulse power | PPP |  |  | 125 | W | 8/20µs exponential decay waveform, IEC61000-4-5 | 2 |
| Peak pulse current | IPP |  |  | 5 | A | 8/20µs exponential decay waveform, IEC61000-4-5 | 2 |
| Lead solder temperature, maximum | TL |  |  | 260 | °C | 10 second duration | 2 |
| Junction and storage temperature range | TJ, TSTG | -55 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `ESDU5V0K4`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `esdu5v0k4-etched.step` / `esdu5v0k4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esdu5v0k4.step` / `esdu5v0k4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755876837468200960) (8 pp, sha256 `0cd9ff996be84d16`, retrieved 2026-10-18, 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/esdu5v0k4-datasheet.pdf)