# SM36-02HTG

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

SM36-02HTG 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/O 1 | bidirectional | Protected line; the datasheet rates it for ESD (IEC 61000-4-2 ±30 kV contact and air) and 8/20 µs surge clamping measured from pin 1 to pin 3. |
| 2 | I/O 2 | bidirectional | Protected line; the datasheet rates it for ESD (IEC 61000-4-2 ±30 kV contact and air) and 8/20 µs surge clamping measured from pin 2 to pin 3. |
| 3 | GND | power_in | Common reference terminal; all clamp and ESD test conditions are specified as pin 1 or pin 2 to pin 3, and the I/O-to-GND capacitance is referenced to it. |

## 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 Voltage Drop | VR | 40 |  |  | V | IR=1mA | 5 |
| ESD Withstand Voltage (IEC 61000-4-2 Contact Discharge) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 (Contact Discharge) | 5 |
| ESD Withstand Voltage (IEC 61000-4-2 Air Discharge) | VESD | -30 |  | 30 | kV | IEC 61000-4-2 (Air Discharge) | 5 |
| Leakage Current | ILEAK |  |  | 1 | µA | VR=36V | 5 |
| Clamp Voltage | VC |  |  | 52 | V | IPP=1A, tp=8/20µs, Pin 1 or Pin 2 to Pin 3 | 5 |
| Clamp Voltage | VC |  |  | 62 | V | IPP=4A, tp=8/20µs, Pin 1 or Pin 2 to Pin 3 | 5 |
| Peak Pulse Current (8/20µs) | IPP |  |  | 5 | A | tp=8/20µs | 5 |
| Diode Capacitance (I/O-GND) | CI/O-GND |  |  | 50 | pF | Reverse Bias=0V, f=1MHz | 5 |
| Diode Capacitance (I/O-I/O) | CI/O-I/O |  |  | 40 | pF | Reverse Bias=0V, f=1MHz | 5 |
| Peak Pulse Power | PPK |  |  | 400 | W | tp=8/20μs | 2 |
| Junction Temperature | TOP | -40 |  | 125 | °C |  | 2 |
| Storage Temperature | TSTOR | -55 |  | 150 | °C |  | 2 |
| Reverse Stand off Voltage | VRWM |  | 36 |  | V |  | 5 |
| Dynamic Resistance | RDYN |  | 0.65 |  | Ω | TLP, tp=100ns, I/O to GND | 5 |

## CAD (KiCad official)

- Symbol: `SM36-02HTG`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sm36-02htg-etched.step` / `sm36-02htg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm36-02htg.step` / `sm36-02htg.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/8783814296591712256) (11 pp, sha256 `0e09b07cb6bbf5ef`, 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/sm36-02htg-datasheet.pdf)