component
SMAJ12AX
Public Made by Adomby adom
Shenzhen JingYang ESD And Surge Protection (TVS/ESD), SMA. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownSMAJ12AX
Shenzhen JingYang · ESD And Surge Protection (TVS/ESD) · SMA
SMAJ12AX from Shenzhen JingYang, in a 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| Package | SMA |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak power dissipation | PPK | 400 | W | TA = 25 ℃, TP = 1ms (Note 1) | 1 | ||
| Peak forward surge current | IFSM | 40 | A | 8.3ms single half sine-wave @ TJ = 25 ℃ (Note 2) | 1 | ||
| Steady state power dissipation | PM(AV) | 1 | W | Steady state at TL = 120 ℃ | 1 | ||
| Maximum instantaneous forward voltage | VF | 3 | V | at 16 A (Note 2, 3) | 1 | ||
| Operating temperature range | TJ | -55 | 175 | C | 1 | ||
| Storage temperature range | TSTG | -55 | 175 | C | 1 | ||
| Breakdown voltage | VBR | 13.3 | 14.7 | V | @ IT = 1 mA | 3 | |
| Maximum reverse voltage at IRSM (clamping voltage) | VRSM | 19.9 | V | at IRSM = 20.1 A | 3 | ||
| Maximum reverse surge current | IRSM | 20.1 | A | 3 | |||
| Maximum leakage current | IR | 0.5 | uA | at VRWM (working peak reverse voltage 12 V) | 3 | ||
| Working peak reverse voltage | VRWM | 12 | V | 3 |
CAD (KiCad official)
- Symbol:
SMAJ12AX - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
smaj12ax-etched.step/smaj12ax-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj12ax.step/smaj12ax.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen JingYang datasheet (4 pp, sha256
e0cea679fd879ca8, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).