SMAJ40A-E3
Public Made by Adomby adom
Vishay Intertech 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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README
markdownSMAJ40A-E3
Vishay Intertech · ESD And Surge Protection (TVS/ESD) · SMA(DO-214AC)
SMAJ40A-E3 from Vishay Intertech, 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 | Vishay Intertech |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage VBR (SMAJ40A, unidirectional) | VBR | 44.4 | 49.1 | V | at IT = 1.0 mA | 2 | |
| Maximum reverse leakage at VWM | ID | 1 | μA | at VWM (40 V) | 2 | ||
| Maximum peak pulse surge current | IPPM | 6.2 | A | surge waveform per fig. 3 (note 2) | 2 | ||
| Maximum clamping voltage | VC | 64.5 | V | at IPPM | 2 | ||
| Maximum temperature coefficient of VBR | 0.101 | %/°C | 2 | ||||
| Peak pulse power dissipation | PPPM | 400 | W | 10/1000 μs waveform (fig. 1), non-repetitive (notes 1, 2) | 1 | ||
| Peak forward surge current | IFSM | 40 | A | 8.3 ms single half sine-wave, unidirectional only | 1 | ||
| Power dissipation | PD | 3.3 | W | on infinite heatsink at TA = 50 °C | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Typical thermal resistance, junction to ambient | RθJA | 120 | °C/W | mounted on minimum recommended pad layout (note 1) | 3 | ||
| Typical thermal resistance, junction to lead | RθJL | 30 | °C/W | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Terminals: matte tin plated leads, solderable per J-STD-002 and JESD 22-B102 | 1 |
CAD (KiCad official)
- Symbol:
SMAJ40A-E3 - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj40a-e3-etched.step/smaj40a-e3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj40a-e3.step/smaj40a-e3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Vishay Intertech datasheet (6 pp, sha256
e8feb369c50967f6, 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).