# UAT36A03L05

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

UAT36A03L05 from YAGEO, 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 | passive | Protected high-speed data line input with a low-capacitance steering diode pair (0.5 pF max between I/O and GND at 0 V, 1 MHz) and ±8 kV contact / ±15 kV air ESD protection. |
| 2 | GND | power_in | Ground connection at the anode of the TVS diode, the return for the steering diodes. |
| 3 | I/O2 | passive | Protected high-speed data line input with a low-capacitance steering diode pair (0.5 pF max between I/O and GND at 0 V, 1 MHz) and ±8 kV contact / ±15 kV air ESD protection. |
| 4 | I/O3 | passive | Protected high-speed data line input with a low-capacitance steering diode pair (0.5 pF max between I/O and GND at 0 V, 1 MHz) and ±8 kV contact / ±15 kV air ESD protection. |
| 5 | VP | power_in | Protected power line connection at the TVS diode cathode, with 3.3 V reverse stand-off voltage (VRWM). |
| 6 | I/O4 | passive | Protected high-speed data line input with a low-capacitance steering diode pair (0.5 pF max between I/O and GND at 0 V, 1 MHz) and ±8 kV contact / ±15 kV air ESD protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YAGEO |
| 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 |
|---|---|---|---|---|---|---|---|
| ESD voltage (Contact discharge) | VESD | -8 |  | 8 | kV | Contact discharge | 2 |
| ESD voltage (Air discharge) | VESD | -15 |  | 15 | kV | Air discharge | 2 |
| Storage & operating temperature range | TSTG ,TJ | -55 |  | 150 | ℃ |  | 2 |
| Reverse stand-off voltage | VRWM |  |  | 3.3 | V |  | 3 |
| Reverse breakdown voltage | VBR | 4.5 |  |  | V | IBR=1mA | 3 |
| Reverse leakage current | IR |  |  | 1 | μA | VR=3.3V, each I/O pin | 3 |
| Clamping voltage (tp=8/20μs) | VC |  |  | 8.5 | V | tp=8/20μs, IPP=1A | 3 |
| Clamping voltage (tp=8/20μs) | VC |  |  | 15 | V | tp=8/20μs, IPP=4A | 3 |
| Peak pulse current (tp=8/20μs) | IPP |  |  | 4 | A | tp=8/20μs | 3 |
| Off state junction capacitance | CJ |  |  | 0.5 | pF | 0Vdc, f=1MHz, between I/O pins and GND | 3 |

## 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 | ● Lead Free/RoHS compliant ● Solder reflow temperature: Pure Tin-Sn, 260~270℃ | 2 |

## CAD (KiCad official)

- Symbol: `UAT36A03L05`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `uat36a03l05-etched.step` / `uat36a03l05-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uat36a03l05.step` / `uat36a03l05.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YAGEO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590320709710360576) (7 pp, sha256 `e8b6c857c0c80c33`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/uat36a03l05-datasheet.pdf)