component
SMAJ40A-AT
Public Made by Adomby adom
Brightking ESD And Surge Protection (TVS/ESD), SMA(DO-214AC). 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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSMAJ40A-AT
Brightking · ESD And Surge Protection (TVS/ESD) · SMA(DO-214AC)
SMAJ40A-AT from Brightking, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Brightking |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power dissipation at 10/1000µs waveform | PPPM | 400 | W | 10/1000µs waveform (Note1, Note2, Fig.1) | 1 | ||
| Peak pulse current at 10/1000µs waveform | IPPM | 6.2 | A | 10/1000µs waveform (Note 1, Fig.3), SMAJ40A-AT row | 3 | ||
| Steady state power dissipation | PM(AV) | 3.3 | W | TA=50℃ (Fig.5) | 1 | ||
| Peak forward surge current | IFSM | 40 | A | 8.3ms single half sine-wave, superimposed on rated load (JEDEC Method) (Note3, Fig.6) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance junction to lead | RθJL | 30 | ℃/W | 1 | |||
| Typical thermal resistance junction to ambient | RθJA | 120 | ℃/W | 1 | |||
| Reverse stand-off voltage (unidirectional SMAJ40A-AT) | VRWM | 40 | V | Unidirectional part number SMAJ40A-AT | 3 | ||
| Breakdown voltage | VBR | 44.4 | 49.1 | V | @IT = 1 mA (test current IT 1 mA) | 3 | |
| Maximum clamping voltage | VC | 64.5 | V | @IPP = 6.2 A | 3 | ||
| Reverse leakage current | IR | 1 | µA | @VRWM = 40.0 V | 3 |
CAD (KiCad official)
- Symbol:
SMAJ40A-AT - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj40a-at-etched.step/smaj40a-at-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj40a-at.step/smaj40a-at.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Brightking datasheet (6 pp, sha256
b89bf590a7f5b511, retrieved 2026-10-15, 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).