component
SMAJ12A-MS
Public Made by Adomby adom
MSKSEMI Electrostatic And Surge Protection (TVS/ESD), SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMAJ12A-MS
MSKSEMI · Electrostatic And Surge Protection (TVS/ESD) · SMA(DO-214AC)
SMAJ12A-MS from MSKSEMI, in a SMA(DO-214AC). 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, marked by the color band on the unidirectional SMAJ12A-MS (VR 12.0 V, VBR 13.30-14.70 V at 1 mA, VC 19.9 V at IPP 20.11 A). |
| 2 | A | passive | Anode of the unidirectional SMAJ12A-MS TVS diode; connects to the protected return or ground side. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SMA(DO-214AC) |
| 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 Stand-off Voltage | VR | 12 | V | T=25℃ | 3 | ||
| Reverse Leakage Current | IR | 1 | μA | @ VR, T=25℃ | 3 | ||
| Breakdown Voltage | VBR | 13.3 | 14.7 | V | @ IT = 1 mA, T=25℃ | 3 | |
| Test Current | IT | 1 | mA | T=25℃ | 3 | ||
| Clamping Voltage | VC | 19.9 | V | @ IPP, 10/1000μs surge | 3 | ||
| Maximum Peak Pulse Current | IPP | 20.11 | A | 10/1000μs surge waveform | 3 | ||
| Peak pulse power dissipation | PPP | 400 | W | 10/1000μs waveform, T=25ºC | 5 | ||
| Steady state power dissipation | PM(AV) | 1 | W | TL=75 C | 5 | ||
| Operating junction temperature range | Tj | -55 | 125 | ℃ | 5 | ||
| Storage temperature range | Tstg | -55 | 150 | ℃ | 5 |
CAD (KiCad official)
- Symbol:
SMAJ12A-MS - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj12a-ms-etched.step/smaj12a-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj12a-ms.step/smaj12a-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (8 pp, sha256
b5f3a0cfe4b0e1eb, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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-MS
**MSKSEMI** · Electrostatic And Surge Protection (TVS/ESD) · SMA(DO-214AC)
SMAJ12A-MS from MSKSEMI, in a SMA(DO-214AC). 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, marked by the color band on the unidirectional SMAJ12A-MS (VR 12.0 V, VBR 13.30-14.70 V at 1 mA, VC 19.9 V at IPP 20.11 A). |
| 2 | A | passive | Anode of the unidirectional SMAJ12A-MS TVS diode; connects to the protected return or ground side. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SMA(DO-214AC) |
| 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 Stand-off Voltage | VR | | 12 | | V | T=25℃ | 3 |
| Reverse Leakage Current | IR | | | 1 | μA | @ VR, T=25℃ | 3 |
| Breakdown Voltage | VBR | 13.3 | | 14.7 | V | @ IT = 1 mA, T=25℃ | 3 |
| Test Current | IT | | 1 | | mA | T=25℃ | 3 |
| Clamping Voltage | VC | | | 19.9 | V | @ IPP, 10/1000μs surge | 3 |
| Maximum Peak Pulse Current | IPP | | | 20.11 | A | 10/1000μs surge waveform | 3 |
| Peak pulse power dissipation | PPP | | | 400 | W | 10/1000μs waveform, T=25ºC | 5 |
| Steady state power dissipation | PM(AV) | | | 1 | W | TL=75 C | 5 |
| Operating junction temperature range | Tj | -55 | | 125 | ℃ | | 5 |
| Storage temperature range | Tstg | -55 | | 150 | ℃ | | 5 |
## CAD (KiCad official)
- Symbol: `SMAJ12A-MS`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `smaj12a-ms-etched.step` / `smaj12a-ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj12a-ms.step` / `smaj12a-ms.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [MSKSEMI datasheet](docs/smaj12a-ms-datasheet.pdf) (8 pp, sha256 `b5f3a0cfe4b0e1eb`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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-ms-datasheet.pdf)