# PESD5V0X1UB

**UMW** · ESD And Surge Protection (TVS/ESD) · SOD-523

PESD5V0X1UB from UMW, in a SOD-523. 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 | One terminal of the single unidirectional ESD protection diode for the protected signal line; the datasheet rates the device at up to 8 kV ESD (IEC 61000-4-2 contact discharge) measured from pin 1 to pin 2. |
| 2 | Pin2 | passive | The other terminal of the single unidirectional ESD protection diode; the datasheet's reverse standoff voltage (VRWM max 5.5 V) and clamping voltage (VCL typ 8 V at IPP 1.5 A) are specified from pin 1 to pin 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse standoff voltage (maximum, quick reference) | VRWM |  |  | 5.5 | V |  | 2 |
| Diode capacitance | Cd |  | 0.95 | 1.1 | pF | VR=0V, f=1MHz | 3 |
| Breakdown voltage | VBR | 5.8 |  | 7.5 | V | IR=10mA | 3 |
| Peak pulse current | IPP |  |  | 1.5 | A | tp=8/20μs | 2 |
| Junction temperature | TJ |  |  | 150 | °C |  | 2 |
| Ambient temperature | Tamb | -55 |  | 150 | °C |  | 2 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 2 |
| Electrostatic discharge voltage (IEC 61000-4-2 contact discharge) | VESD |  |  | 8 | kV | IEC 61000-4-2 (contact discharge) | 2 |
| Electrostatic discharge voltage (machine model) | VESD |  |  | 400 | V | machine model | 2 |
| Electrostatic discharge voltage (human body model) | VESD |  |  | 10 | kV | MIL-STD-883 (human body model) | 2 |
| Reverse leakage current | IRM |  | 1 |  | nA | VRWM=5V | 3 |
| Clamping voltage | VCL |  | 8 |  | V | IPP=1.5A | 3 |
| Dynamic resistance | rdyn |  | 0.25 |  | Ω |  | 3 |

## CAD (KiCad official)

- Symbol: `PESD5V0X1UB`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `pesd5v0x1ub-etched.step` / `pesd5v0x1ub-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd5v0x1ub.step` / `pesd5v0x1ub.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/8755880036836749312) (8 pp, sha256 `29ff49d474f582b8`, retrieved 2026-10-15, 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/pesd5v0x1ub-datasheet.pdf)