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SML4738A-E3

Public Made by Adom

by adom

Vishay Intertech Zener Diodes, DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SML4738A-E3

Vishay Intertech · Zener Diodes · DO-214AC(SMA)

SML4738A-E3 from Vishay Intertech, 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 (marked with the cathode band) of the Zener diode; SML4738A has a nominal VZ of 8.2 V at IZT 31 mA with ±5 % tolerance.
2 A passive Anode of the Zener diode, the terminal opposite the cathode band on the DO-214AC (SMA) package.

Key specifications

Parameter Value
Manufacturer Vishay Intertech
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 1
Reverse current IR 10 μA at VR = 6 V 2
Dynamic resistance ZZ 4.5 Ω at IZT1 2
Dynamic resistance (knee) ZZK 700 Ω at IZT2 2
Surge current IRM 550 mApk 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT 2
Power dissipation Ptot 1000 mW TL = 75 °C 1
Junction temperature Tj 150 °C 1
Storage temperature range Tstg -65 150 °C 1
Nominal Zener voltage VZ 8.2 V at IZT1 2
Test current 1 IZT1 31 mA 2
Test current 2 IZT2 0.5 mA 2

CAD (KiCad official)

  • Symbol: SML4738A-E3
  • Footprint: Diode_SMD:D_SMA
  • 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
  • 3D model files: sml4738a-e3-etched.step / sml4738a-e3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sml4738a-e3.step / sml4738a-e3.glb are the bare package body.

Provenance

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

  • Datasheet: Vishay Intertech datasheet (5 pp, sha256 15b3fea9a6e65941, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (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