# AZC199-04S-MS

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

AZC199-04S-MS 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 | I/O 1 | bidirectional | Protected I/O line 1 of the four-line TVS array, rated 100 W peak pulse power per line (tP=8/20µs) with IEC61000-4-2 ESD protection of ±30 kV (air and contact). |
| 2 | GND | power_in | Ground reference for the protection array; the clamping voltages are specified I/O pin to Ground. |
| 3 | I/O 2 | bidirectional | Protected I/O line 2 of the four-line TVS array, rated 100 W peak pulse power per line (tP=8/20µs) with IEC61000-4-2 ESD protection of ±30 kV (air and contact). |
| 4 | I/O 3 | bidirectional | Protected I/O line 3 of the four-line TVS array, rated 100 W peak pulse power per line (tP=8/20µs) with IEC61000-4-2 ESD protection of ±30 kV (air and contact). |
| 5 | VDD | power_in | VDD pin of the protection array as shown in the pin configuration and circuit diagram; the datasheet gives no separate voltage limit or function for this pin. |
| 6 | I/O 4 | bidirectional | Protected I/O line 4 of the four-line TVS array, rated 100 W peak pulse power per line (tP=8/20µs) with IEC61000-4-2 ESD protection of ±30 kV (air and contact). |

## 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power dissipation (8/20µs waveform) | PPP |  |  | 100 | W | 8/20µs waveform | 3 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | V | ESD per IEC 61000-4-2 (Air) | 3 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | V | ESD per IEC 61000-4-2 (Contact) | 3 |
| Lead soldering temperature | TL |  |  | 260 | ℃ | 10 sec. | 3 |
| Operating junction temperature range | TJ | -55 |  | 125 | ℃ |  | 3 |
| Storage temperature range | TSTG | -55 |  | 150 | ℃ |  | 3 |
| Forward voltage | VF |  | 0.8 | 1 | V | IT=10mA | 3 |
| Clamping voltage (I/O pin to Ground) | VC |  | 9.5 | 11 | V | IPP=1A, tP=8/20µs | 3 |
| Clamping voltage (I/O pin to Ground) | VC |  | 12.5 | 15 | V | IPP=5A, tP=8/20µs | 3 |
| Junction capacitance (any I/O pin to Ground) | CJ |  | 0.65 | 0.8 | pF | VRWM=0V, f=1MHz, any I/O pin to Ground | 3 |
| Junction capacitance (between I/O pins) | CJ |  | 0.3 | 0.5 | pF | VRWM=0V, f=1MHz, between I/O pins | 3 |

## CAD (KiCad official)

- Symbol: `AZC199-04S-MS`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `azc199-04s-ms-etched.step` / `azc199-04s-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `azc199-04s-ms.step` / `azc199-04s-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/8588944297115074560) (6 pp, sha256 `771e03ae10b308f2`, 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/azc199-04s-ms-datasheet.pdf)