component
SMAJ12A
Public Made by Adomby adom
MDD Microdiode Semiconductor ESD And Surge Protection (TVS/ESD), DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMAJ12A
MDD Microdiode Semiconductor · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)
SMAJ12A 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 | CATHODE | passive | Cathode is the terminal marked by the cathode band on the DO-214AC/SMA body, and the band applies to unidirectional products such as SMAJ12A, which has a reverse stand-off voltage (VRWM) of 12.0 V and a clamping voltage (VC) of 19.9 V at 1 A peak pulse current. |
| 2 | A | passive | Anode is the terminal opposite the cathode band, and the datasheet rates the unidirectional device at a peak pulse power of 400 W for a 10/1000 µs waveform and a peak forward surge current of 40 A for an 8.3 ms half sine wave. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | DO-214AC(SMA) |
| Category | Circuit Protection |
| Pins | 2 |
CAD (KiCad official)
- Symbol:
SMAJ12A - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
smaj12a-etched.step/smaj12a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj12a.step/smaj12a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MDD Microdiode Semiconductor datasheet (5 pp, sha256
06be130fd62f61d1, retrieved 2026-10-12, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# SMAJ12A
**MDD Microdiode Semiconductor** · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)
SMAJ12A 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 | CATHODE | passive | Cathode is the terminal marked by the cathode band on the DO-214AC/SMA body, and the band applies to unidirectional products such as SMAJ12A, which has a reverse stand-off voltage (VRWM) of 12.0 V and a clamping voltage (VC) of 19.9 V at 1 A peak pulse current. |
| 2 | A | passive | Anode is the terminal opposite the cathode band, and the datasheet rates the unidirectional device at a peak pulse power of 400 W for a 10/1000 µs waveform and a peak forward surge current of 40 A for an 8.3 ms half sine wave. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| Package | DO-214AC(SMA) |
| Category | Circuit Protection |
| Pins | 2 |
## CAD (KiCad official)
- Symbol: `SMAJ12A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `smaj12a-etched.step` / `smaj12a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj12a.step` / `smaj12a.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/8565978305943142400) (5 pp, sha256 `06be130fd62f61d1`, retrieved 2026-10-12, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/smaj12a-datasheet.pdf)