# AZ5123-01H-MS

**MSKSEMI** · ESD Protection Devices · SOD-523

AZ5123-01H-MS from MSKSEMI, in a SOD-523. 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 | Pin1 | passive | Bidirectional TVS line terminal (pin 1) protecting one power or I/O port, with VRWM 3.3 V and 80 W peak pulse power (8/20μs). |
| 2 | Pin2 | passive | Bidirectional TVS line terminal (pin 2) protecting one power or I/O port, with VRWM 3.3 V and 80 W peak pulse power (8/20μs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOD-523 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## 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 | 4.8 | 6.8 |  | V | IT = 1mA | 3 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM = 5V T=25℃ | 3 |
| Clamping Voltage (TLP) | VC |  |  | 9 | V | TLP = 16A, t = 100ns | 3 |
| Clamping Voltage | VC |  | 8 | 10 | V | IPP=8A | 3 |
| Junction Capacitance | CJ |  |  | 33 | pF | VR=0V f = 1MHz | 3 |
| Peak Pulse Power | Ppp |  |  | 80 | W | tp=8/20μs | 3 |
| Operating Temperature | TJ | -55 |  | 150 | ℃ |  | 3 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 3 |
| Peak Reverse Working Voltage | VRWM |  |  | 3.3 | V |  | 3 |
| Dynamic resistance | RDYN |  | 0.15 |  | Ω |  | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin |  Lead finish:100% matte Sn(Tin)  Mounting position: Any | 2 |

## CAD (KiCad official)

- Symbol: `AZ5123-01H-MS`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `az5123-01h-ms-etched.step` / `az5123-01h-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `az5123-01h-ms.step` / `az5123-01h-ms.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](docs/az5123-01h-ms-datasheet.pdf) (7 pp, sha256 `280dae2cc93c867a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/az5123-01h-ms-datasheet.pdf)