# SMAJ40CA

**MDD Microdiode Semiconductor** · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)

SMAJ40CA from MDD Microdiode Semiconductor, in a DO-214AC(SMA). 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 | A1 | passive | Bidirectional TVS terminal 1 (SMAJ40CA, no cathode band), VRWM 40.0 V, VBR 44.40~49.10 V at 1 mA, VC 64.5 V at 6.2 A IPP; interchangeable with terminal 2. |
| 2 | A2 | passive | Bidirectional TVS terminal 2 (SMAJ40CA, no cathode band), VRWM 40.0 V, VBR 44.40~49.10 V at 1 mA, VC 64.5 V at 6.2 A IPP; interchangeable with terminal 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | DO-214AC(SMA) |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMAJ40CA`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `smaj40ca-etched.step` / `smaj40ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj40ca.step` / `smaj40ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD Microdiode Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8565978319197143040) (5 pp, sha256 `06be130fd62f61d1`, retrieved 2026-10-12, 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/smaj40ca-datasheet.pdf)