# ESD5V5U5ULC

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-23-6

ESD5V5U5ULC from TECH PUBLIC, in a SOT-23-6. 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 | ESD-protected I/O line 1 with 0.25pF typical I/O-to-I/O capacitance, 5.5V max reverse working voltage, clamped to GND (pin 2). |
| 2 | GND | power_in | Common ground for all TVS diode channels, connected to the ground reference of the protected system. |
| 3 | I/O2 | passive | ESD-protected I/O line 2 with 0.25pF typical I/O-to-I/O capacitance, 5.5V max reverse working voltage, clamped to GND (pin 2). |
| 4 | I/O3 | passive | ESD-protected I/O line 3 with 0.25pF typical I/O-to-I/O capacitance, 5.5V max reverse working voltage, clamped to GND (pin 2). |
| 5 | I/O4 | passive | ESD-protected I/O line 4 with 0.25pF typical I/O-to-I/O capacitance, 5.5V max reverse working voltage, clamped to GND (pin 2). |
| 6 | I/O5 | passive | ESD-protected I/O line 5 with 0.25pF typical I/O-to-I/O capacitance, 5.5V max reverse working voltage, clamped to GND (pin 2). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `ESD5V5U5ULC`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `esd5v5u5ulc-etched.step` / `esd5v5u5ulc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5v5u5ulc.step` / `esd5v5u5ulc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590234057860030464) (4 pp, sha256 `dd1b5d1d0524db9c`, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/esd5v5u5ulc-datasheet.pdf)