# SESR05

**SEMIWARE** · ESD Protection Devices · SOT-143

SESR05 from SEMIWARE, in a SOT-143. 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 | GND | power_in | Ground reference of the steering-diode array, connected to the diode network on the pin configuration diagram. |
| 2 | I/O | passive | Protected I/O line 1 (steering diodes to REF and GND); IR max 1 uA at VRWM 5.0 V, CT(I/O-GND) typ 2.0 pF. |
| 3 | I/O | passive | Protected I/O line 2 (steering diodes to REF and GND); IR max 1 uA at VRWM 5.0 V, CT(I/O-I/O) typ 1.0 pF. |
| 4 | REF | passive | Reference pin connected to the TVS avalanche diode of the array, with breakdown VB min 6.0 V at 1 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SEMIWARE |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `SESR05`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files: `sesr05-etched.step` / `sesr05-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sesr05.step` / `sesr05.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SEMIWARE datasheet](docs/sesr05-datasheet.pdf) (4 pp, sha256 `1172a50d99733975`, retrieved 2026-10-22, 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/sesr05-datasheet.pdf)