# MS2A40LWS

**MSKSEMI** · Schottky Diodes · SOD-323

MS2A40LWS from MSKSEMI, in a SOD-323. 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 of the Schottky diode, marked by the band on the package and shown as the '-' lead in the package drawing; VRRM/VR rating 40 V. |
| 2 | A | passive | Anode of the Schottky diode, shown as the '+' lead in the package drawing; average forward current IF(AV) 2 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOD-323 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum repetitive reverse voltage | VRRM |  |  | 40 | V |  | 3 |
| Maximum DC blocking reverse voltage | VR |  |  | 40 | V |  | 3 |
| Average Forward Current | IF(AV) |  |  | 2 | A |  | 3 |
| Peak Forward Surge Current | IFSM |  |  | 20 | A | At 8.3ms single half sine-wave | 3 |
| Operating Junction Temperature | TJ | -50 |  | 125 | ℃ |  | 3 |
| Storage Temperature Range | TSTG | -50 |  | 150 | ℃ |  | 3 |
| Breakdown Voltage | VBR | 40 |  |  | V | IR=0.1mA | 3 |
| Reverse Leakage Current | IR |  |  | 80 | μA | VR=40V | 3 |
| Forward Voltage | VF |  | 0.37 | 0.42 | V | IF=1A | 3 |
| Forward Voltage | VF |  |  | 0.5 | V | IF=2A | 3 |
| Junction Capacitance | CJ |  | 340 | 400 | pF | VR = 0V, f = 1MHz | 3 |

## CAD (KiCad official)

- Symbol: `MS2A40LWS`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `ms2a40lws-etched.step` / `ms2a40lws-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ms2a40lws.step` / `ms2a40lws.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/8603058276666404864) (6 pp, sha256 `eb1d56e2826581be`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/ms2a40lws-datasheet.pdf)