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SMA4739A

Public Made by Adom

by adom

Yangzhou Yangjie Elec Tech Zener Diodes, 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.

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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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Contents

README

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SMA4739A

Yangzhou Yangjie Elec Tech · Zener Diodes · SMA(DO-214AC)

SMA4739A from Yangzhou Yangjie Elec Tech, 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 Yangzhou Yangjie Elec Tech
Package SMA(DO-214AC)
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 (Min / Typ / Max) VZ 8.65 9.1 9.56 V at IZT 28.0 mA 2
Maximum dynamic impedance ZZT 5 Ω at IZT 28.0 mA 2
Maximum dynamic impedance ZZK 700 Ω at IZK 0.50 mA 2
Maximum reverse leakage current IR 10 μA at VR 7.0 V 2
Maximum surge current IRM 500 mA non-repetitive 8.3 ms pulse superimposed on IZT per JEDEC method 2
Maximum DC Zener current IZM 100 mA 2
DC power dissipation PD 1 W at TL = 75 °C 1
Maximum instantaneous forward voltage VF 1.2 V @ IF = 200 mA 1
Maximum junction temperature Tj -55 150 ℃ 1
Storage temperature range Tstg -55 150 ℃ 1
Thermal resistance, junction to lead RθJ-L 30 ℃/W junction to lead, PCB with 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pad areas 1
Thermal resistance, junction to ambient RθJ-A 170 ℃/W junction to ambient, PCB with 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pad areas 1

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: Tin plated leads, solderable per J-STD-002 and JESD22-B102 1

CAD (KiCad official)

  • Symbol: SMA4739A
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
  • 3D model files: sma4739a-etched.step / sma4739a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sma4739a.step / sma4739a.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Yangzhou Yangjie Elec Tech datasheet (6 pp, sha256 0887575cbf398ef1, retrieved 2026-10-22, 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