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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSMAJ12A-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).