component

SML4749A

Public Made by Adom

by 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.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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README.md Publish 0.1.0 · Ray 7d ago
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sml4749a-etched.step sml4749a: factory component page (tier=lcsc) · Ray 7d ago
sml4749a-hero.glb sml4749a: hero GLB from the etched model (keeps the MPN mark) · Ray 7d ago
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SML4749A

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sml4749a.step / sml4749a.glb are 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, primary cathode-band convention (convention), consensus off (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).

Datasheet PDF