# UMZ27NUM-TP

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-323

UMZ27NUM-TP from TECH PUBLIC, in a SOT-323. 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 (TVS diode anode); 22V reverse working voltage, 25V min breakdown at 1mA, ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |
| 2 | I/O2 | passive | Protected line 2 (TVS diode anode); 22V reverse working voltage, 25V min breakdown at 1mA, ±15kV air / ±8kV contact ESD per IEC 61000-4-2. |
| 3 | COMMON | passive | Common node of the two uni-directional TVS diodes (shared by both lines in the schematic). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-323 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `UMZ27NUM-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `umz27num-tp-etched.step` / `umz27num-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `umz27num-tp.step` / `umz27num-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/umz27num-tp-datasheet.pdf) (4 pp, sha256 `8a3328bdfb7e739b`, 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/umz27num-tp-datasheet.pdf)