# MS0402ESDA-14

**MSKSEMI** · ESD And Surge Protection (TVS/ESD) · 0402

MS0402ESDA-14 from MSKSEMI, in a 0402. 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 | 0402 |
| 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 |
|---|---|---|---|---|---|---|---|
| Varistor voltage tolerance | VB | -20 |  | 20 | % |  | 2 |
| Maximum clamping voltage | VC |  |  | 250 | V | Measured at 1A by 8/20µs Pulse | 2 |
| Leakage current at VB x80% (after reliability test) | ILVBA |  |  | 100 | µΑ | After reliability test | 2 |
| Leakage current at VB x80% (initial state) | ILVB |  |  | 20 | µΑ | At initial state | 2 |
| Response time | T rise |  |  | 1 | ns |  | 2 |
| Capacitance tolerance |  | -0.3 |  | 0.3 | PF |  | 2 |
| Operating ambient temperature |  | -55 |  | 125 | ℃ |  | 2 |
| Storage temperature |  | -40 |  | 125 | ℃ |  | 2 |
| Reflow temperature profile (recommended) |  |  |  | 260 | ℃ | Recommended reflow temperature profile | 2 |
| Varistor voltage | VB |  | 130 |  | V | Measured at 1mA DC | 2 |
| Typical capacitance value | C |  | 1 |  | pF | Measured at f=1kHz, Vrms=0.5V | 2 |

## CAD (KiCad official)

- Symbol: `MS0402ESDA-14`
- Footprint: `Diode_SMD:D_0402_1005Metric`
- 3D model: 0402, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.4 mm nominal _0402_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `ms0402esda-14-etched.step` / `ms0402esda-14-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ms0402esda-14.step` / `ms0402esda-14.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/8552838795822321664) (6 pp, sha256 `72e96d46fabb2282`, retrieved 2026-10-19, 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/ms0402esda-14-datasheet.pdf)