# UDT23A05L02

**UMW** · ESD And Surge Protection (TVS/ESD) · SOT-23

UDT23A05L02 from UMW, in a SOT-23. 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 | ESD-protected high-speed data line 1 with 5V reverse stand-off voltage (VRWM), 0.8pF max junction capacitance to GND and 12V max clamping voltage at IPP=1A. |
| 2 | I/O2 | passive | ESD-protected high-speed data line 2 with 5V reverse stand-off voltage (VRWM), 0.8pF max junction capacitance to GND and 12V max clamping voltage at IPP=1A. |
| 3 | GND | power_in | Common ground return node of the TVS array, to which both I/O clamp diodes connect (capacitance is specified between I/O pins and GND). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## 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 | 6 |  |  | V | IBR=1mA | 3 |
| Reverse leakage current | IR |  |  | 5 | µA | VR=5V, Each I/O pin | 3 |
| Clamping voltage (tp=8/20µs) | VC |  |  | 12 | V | IPP=1A | 3 |
| Reverse stand-off voltage | VRWM |  | 5 |  | V |  | 3 |
| Off state junction capacitance | CJ |  | 0.8 |  | pF | 0Vdc,f=1MHz, Between I/O pins and GND | 3 |
| Peak pulse power | PPP |  |  | 400 | W | tp=8/20us waveform | 2 |
| ESD voltage (Contact discharge) | VESD | -8 |  | 8 | kV | Contact discharge | 2 |
| ESD voltage (Air discharge) | VESD | -15 |  | 15 | kV | Air discharge | 2 |
| Storage & Junction temperature range | TSTG, TJ | -55 |  | 150 | °C | Storage & Junction temperature range | 2 |

## CAD (KiCad official)

- Symbol: `UDT23A05L02`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `udt23a05l02-etched.step` / `udt23a05l02-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `udt23a05l02.step` / `udt23a05l02.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/8755887764628230144) (10 pp, sha256 `5a686a6064e228aa`, retrieved 2026-10-17, 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/udt23a05l02-datasheet.pdf)