# NUP3105LT1G

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

NUP3105LT1G 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 | Protected line 1, connected through a TVS diode pair to common pin 3, with 36V working voltage (VRWM) and 30kV ESD rating. |
| 2 | I/O2 | passive | Protected line 2, connected through a TVS diode pair to common pin 3, with 36V working voltage (VRWM) and 30kV ESD rating. |
| 3 | COMMON | passive | Common node shared by both TVS diode paths from pins 1 and 2. |

## 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 Stand-Off Voltage | VRWM |  |  | 36 | V |  | 3 |
| Reverse Breakdown Voltage | VBR | 38 |  |  | V | IT=1mA | 3 |
| Reverse Leakage Current | IR |  |  | 1 | µA | VRWM=36V | 3 |
| Clamping Voltage | VC |  |  | 55 | V | IPP=1A, tP=8/20μs | 3 |
| Clamping Voltage | VC |  |  | 72 | V | IPP=4A, tP=8/20μs | 3 |
| Junction capacitance | CJ |  |  | 25 | pF | VR=0V, f=1MHz | 3 |
| Peak pulse power | PPK |  |  | 450 | W | tp=8/20us @25°C | 2 |
| Peak pulse current | IPP |  |  | 4 | A | tp=8/20us @25°C | 2 |
| ESD (IEC61000-4-2 air discharge) | VESD | -30 |  | 30 | kV | @25°C | 2 |
| ESD (IEC61000-4-2 contact discharge) | VESD | -30 |  | 30 | kV | @25°C | 2 |
| Junction temperature | TJ |  |  | 150 | °C |  | 2 |
| Operating temperature | TOP | -40 |  | 125 | °C |  | 2 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 2 |
| Lead temperature | TL |  |  | 260 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `NUP3105LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `nup3105lt1g-etched.step` / `nup3105lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nup3105lt1g.step` / `nup3105lt1g.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/8755880507056246784) (7 pp, sha256 `34f7f92110846443`, 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/nup3105lt1g-datasheet.pdf)