# NUP1301

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

NUP1301 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 | ANODE | passive | Anode of one of the two diodes in the device; the datasheet states that transients exceeding the diode forward voltage plus the reference voltage are directed to the supply rail or ground, with 0.9 pF maximum diode capacitance. |
| 2 | CATHODE | passive | Cathode of the second diode in the device; the datasheet rates IEC61000-4-2 (Level 4) protection at 8.0 kV contact and 15 kV air. |
| 3 | CATHODE/ANODE | passive | Common terminal shared by both diodes; the datasheet gives a 70 V reverse voltage and 215 mA forward current rating for the device. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `NUP1301`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `nup1301-etched.step` / `nup1301-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nup1301.step` / `nup1301.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/8755880804763615232) (7 pp, sha256 `0a65a436e57906d2`, retrieved 2026-10-09, 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/nup1301-datasheet.pdf)