component
SML4749A
Public Made by Adomby adom
JUXING Zener Diodes, DO-214AC(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
markdownSML4749A
JUXING · Zener Diodes · DO-214AC(SMA)
SML4749A from JUXING, in a DO-214AC(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 | JUXING |
| Package | DO-214AC(SMA) |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage tolerance (suffix A) | VZ | -5 | 5 | % | suffix A (SML4749A); standard part is 10% | 1 | |
| Power dissipation | P | 1 | W | 1 | |||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 | ||
| Maximum junction temperature | TJ max | 150 | °C | 1 | |||
| Nominal zener voltage | VZ | 24 | V | @ IZT 10.5 mA | 2 | ||
| Zener impedance | ZZT | 25 | Ω | @ IZT 10.5 mA | 2 | ||
| Zener impedance at knee | ZZK | 750 | Ω | @ IZK 0.25 mA | 2 | ||
| Leakage current | IR | 5 | uA | @ VR 18.2 V | 2 | ||
| Surge current | IRM | 190 | mApk | 8.3 ms non-repetitive pulse superimposed on IZT per JEDEC method | 2 |
CAD (KiCad official)
- Symbol:
SML4749A - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
sml4749a-etched.step/sml4749a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sml4749a.step/sml4749a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JUXING datasheet (2 pp, sha256
b93bda0a3ba7c96b, 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).