# GSOT05C-MS

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

GSOT05C-MS from MSKSEMI, 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 | 1 | passive | Anode of the first unidirectional TVS diode, protected line 1 (VRWM 5.0 V, VBR 6.0 to 7.4 V at 1 mA for GSOT05C-MS). |
| 2 | 2 | passive | Anode of the second unidirectional TVS diode, protected line 2 (VRWM 5.0 V, VBR 6.0 to 7.4 V at 1 mA for GSOT05C-MS). |
| 3 | 3 | passive | Common cathode of both TVS diodes, shown joined to the top of both diodes in the package schematic. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage | VBR | 6 | 6.7 | 7.4 | V | IT = 1 mA | 2 |
| Stand-off voltage | VRWM |  | 5 |  | V |  | 2 |
| Leakage current | IR |  | 1 |  | µA |  | 2 |
| Diode capacitance | C |  | 30 |  | pF | 0 V bias | 2 |
| Peak pulse power | PPP |  |  | 300 | W | tp = 8/20 µs | 2 |
| Lead solder temperature | TL |  |  | 260 | °C | 10 second duration | 2 |
| Storage temperature range | Tstg | -55 |  | 150 | °C |  | 2 |
| Operating temperature range | Top | -40 |  | 125 | °C |  | 2 |
| Maximum junction temperature | Tj |  |  | 150 | °C |  | 2 |
| ESD air discharge | VPP |  |  | 15 | kV | IEC61000-4-2 air discharge | 2 |
| ESD contact discharge | VPP |  |  | 8 | kV | IEC61000-4-2 contact discharge | 2 |

## CAD (KiCad official)

- Symbol: `GSOT05C-MS`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `gsot05c-ms-etched.step` / `gsot05c-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gsot05c-ms.step` / `gsot05c-ms.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590228835380719616) (5 pp, sha256 `101a4f5a2f0d1727`, 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/gsot05c-ms-datasheet.pdf)