# LESD5Z5.0CT1G

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

LESD5Z5.0CT1G 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 | 1 | passive | Terminal 1 of the bidirectional TVS diode, connected to the protected I/O line (working voltage 5V, reverse leakage max 1.0 µA at VRWM = 5V). |
| 2 | 2 | passive | Terminal 2 of the bidirectional TVS diode, connected to the opposite side (ground or return) of the protected I/O line (VBR 5.6V min at IT = 1mA, clamping voltage 15.0V max at IPP = 5A, 8/20µs). |

## 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 Breakdown Voltage | VBR | 5.6 |  | 9 | V | IT = 1mA | 2 |
| Clamping Voltage | VC |  |  | 9.5 | V | IPP = 1A, tp = 8/20μs | 2 |
| Clamping Voltage | VC |  |  | 15 | V | IPPmax = 5A, tp = 8/20μs | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM = 5V | 2 |
| Junction Capacitance | CJ |  |  | 15 | pF | VR = 0V, f = 1MHz | 2 |
| Reverse Working Voltage | VRWM |  |  | 5 | V |  | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | kV | ESD per IEC 61000-4-2 (Contact) | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | kV | ESD per IEC 61000-4-2 (Air) | 2 |
| Peak Pulse Power | PPP |  |  | 75 | W | 8/20μs | 2 |
| Operating Temperature | TOPT | -40 |  | 150 | C |  | 2 |
| Storage Temperature | TSTG | -40 |  | 150 | C |  | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | Terminals: Tin plated, solderable per MIL-STD-750, method 2026 | 1 |

## CAD (KiCad official)

- Symbol: `LESD5Z5.0CT1G`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `lesd5z5-0ct1g-etched.step` / `lesd5z5-0ct1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lesd5z5-0ct1g.step` / `lesd5z5-0ct1g.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/8589839519202906112) (4 pp, sha256 `8f8a77a577efc245`, retrieved 2026-10-19, 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/lesd5z5-0ct1g-datasheet.pdf)