# PESD24VS1UB-MS

**MSKSEMI** · ESD And Surge Protection (TVS/ESD) · SOD-523

PESD24VS1UB-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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOD-523 |
| Category | Circuit 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 |
|---|---|---|---|---|---|---|---|
| Reverse leakage current | IR |  |  | 1 | µA | @VRWM | 2 |
| Breakdown voltage | VBR | 26.1 |  |  | V | @ImA | 2 |
| Clamping voltage | VC |  |  | 44 | V | VC@1 | 2 |
| Clamping voltage at IPP | VC |  |  | 54 | V | VC@IPP, IPP = 3 A | 2 |
| Junction capacitance | CJ |  |  | 30 | pF |  | 2 |
| Peak pulse power | PPK |  |  | 250 | Watts | tp = 8/20μs | 2 |
| Lead soldering temperature | TL |  |  | 260 | ℃ | 10 sec. | 2 |
| Operating temperature | TJ | -55 |  | 125 | ℃ |  | 2 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `PESD24VS1UB-MS`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `pesd24vs1ub-ms-etched.step` / `pesd24vs1ub-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd24vs1ub-ms.step` / `pesd24vs1ub-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/8590197964821069824) (5 pp, sha256 `275b73343c518b7a`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/pesd24vs1ub-ms-datasheet.pdf)