component
SMAJ45AJ
Public Made by Adomby adom
WeEn Semiconductors 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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSMAJ45AJ
WeEn Semiconductors · ESD And Surge Protection (TVS/ESD) · SMA
SMAJ45AJ from WeEn Semiconductors, 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 | WeEn Semiconductors |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage | VBR | 50.4 | 54.9 | V | Tj = 25 °C; test current IT = 1 mA | 2 | |
| Max. clamping voltage | VC | 72.7 | V | Tj = 25 °C; @ Ipp = 5.5 A | 2 | ||
| Maximum reverse leakage | IR | 1 | μA | Tj = 25 °C; @ VR = 45 V | 2 | ||
| Max. peak pulse current | Ipp | 5.5 | A | 2 | |||
| Peak pulse power | PPPM | 400 | W | footnote [1]: IEC 61643-321, 10/1000 μs current waveform | 1 | ||
| Steady state power dissipation | PM(AV) | 3.3 | W | on infinite heatsink at Ta = 50 °C | 1 | ||
| Peak forward surge current | IFSM | 60 | A | tp = 8.3 ms; single half sine-wave pulse; duty cycle = 4 pulses per minute maximum; unidirectional units only | 1 | ||
| Forward on-state voltage | VF | 3.5 | V | IF = 35 A; unidirectional units only | 1 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 1 | ||
| Operating temperature range | Tj | -65 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
SMAJ45AJ - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
smaj45aj-etched.step/smaj45aj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj45aj.step/smaj45aj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WeEn Semiconductors datasheet (7 pp, sha256
17c388c201e50792, 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).