# GSOT15C-E3-08

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

GSOT15C-E3-08 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 | L1 / pin 1 | passive | Connects to signal or data line L1 in BiAs mode, where the protection diodes to pin 3 hold a maximum reverse working voltage of 15 V (VRWM) and a peak pulse current of 8 A (IPPM, 8/20 µs) for GSOT15C; in BiSy mode it is the line pin. |
| 2 | L2 / pin 2 | passive | Connects to signal or data line L2 in BiAs mode, with the same GSOT15C limits of 15 V VRWM and 8 A IPPM (8/20 µs) to pin 3; in BiSy mode it is tied to ground (or swapped with pin 1). |
| 3 | GND / pin 3 | power_in | Ground reference pin that must be connected to ground in BiAs mode, and must not be connected in BiSy mode (single-line use with pin 1 to the line and pin 2 to ground). |

## 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse current, pin 1 to 3 or pin 2 to 3 | IPPM |  |  | 8 | A | acc. IEC 61000-4-5, tp=8/20μs; single shot | 4 |
| Peak pulse current, pin 1 to 2 or pin 2 to 1 (pin 3 not connected) | IPPM |  |  | 8 | A | acc. IEC 61000-4-5, tp=8/20μs; single shot | 4 |
| Peak pulse power, pin 1 to 3 or pin 2 to 3 | PPP |  |  | 345 | W | acc. IEC 61000-4-5, tp=8/20μs; single shot | 4 |
| Peak pulse power, pin 1 to 2 or pin 2 to 1 (pin 3 not connected) | PPP |  |  | 400 | W | acc. IEC 61000-4-5, tp=8/20μs; single shot | 4 |
| ESD immunity, contact discharge | VESD | -30 |  | 30 | kV | acc. IEC 61000-4-2; 10 pulses | 4 |
| ESD immunity, air discharge | VESD | -30 |  | 30 | kV | acc. IEC 61000-4-2; 10 pulses | 4 |
| Junction temperature | TJ | -55 |  | 150 | °C |  | 4 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 4 |
| Reverse stand-off voltage (max. reverse working voltage) | VRWM |  |  | 15 | V |  | 10 |
| Reverse voltage | VR | 15 |  |  | V | at IR=1μA | 10 |
| Reverse current | IR |  |  | 1 | μA | at VR=15V | 10 |
| Reverse breakdown voltage | VBR | 16.5 | 18 | 19.4 | V | at IR=1mA | 10 |

## CAD (KiCad official)

- Symbol: `GSOT15C-E3-08`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `gsot15c-e3-08-etched.step` / `gsot15c-e3-08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gsot15c-e3-08.step` / `gsot15c-e3-08.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/8755873470611759104) (21 pp, sha256 `0b440e1da93472e0`, retrieved 2026-10-20, 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/gsot15c-e3-08-datasheet.pdf)