# MSKSRV05-4A

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

MSKSRV05-4A from MSKSEMI, 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 | IO1 | bidirectional | Connect to I/O. |
| 2 | GND | power_in | Connect to GND. |
| 3 | IO2 | bidirectional | Connect to I/O. |
| 4 | IO3 | bidirectional | Connect to I/O. |
| 5 | Vcc | power_in | Connect to Vcc. |
| 6 | IO4 | bidirectional | Connect to I/O. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Stand-off Voltage | VRWM |  |  | 5 | V |  | 3 |
| Reverse Breakdown Voltage | VBR | 6 |  |  | V | IT=1mA | 3 |
| Reverse Leakage Current | IR |  |  | 1 | uA | VRWM=5V | 3 |
| Clamping Voltage | VC |  |  | 9 | V | IPP=1A; tp=8/20us | 3 |
| Clamping Voltage | VC |  |  | 12 | V | IPP=4.5A; tp=8/20us | 3 |
| Junction Capacitance | CJ |  | 0.6 | 0.8 | pF | I/O to GND; VR=0V; f=1MHz | 3 |
| Junction Capacitance | CJ |  | 0.3 | 0.4 | pF | Between I/O; VR=0V; f=1MHz | 3 |
| Peak pulse power | Ppk |  |  | 60 | W | tp=8/20us @25℃ | 3 |
| Peak pulse current | IPP |  |  | 4.5 | A | tp=8/20us @25℃ | 3 |
| ESD (IEC61000-4-2 air discharge) | VESD |  |  | 17 | kV | IEC61000-4-2 air discharge @25℃ | 3 |
| ESD (IEC61000-4-2 contact discharge) | VESD |  |  | 12 | kV | IEC61000-4-2 contact discharge @25℃ | 3 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 3 |
| Operating temperature | TOP | -40 |  | 125 | ℃ | Over operating free-air temperature range (unless otherwise noted) | 3 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 3 |
| Lead temperature | TL |  |  | 260 | ℃ |  | 3 |

## CAD (KiCad official)

- Symbol: `MSKSRV05-4A`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `msksrv05-4a-etched.step` / `msksrv05-4a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msksrv05-4a.step` / `msksrv05-4a.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/8589835026557657088) (6 pp, sha256 `c1399f68b09869e8`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/msksrv05-4a-datasheet.pdf)