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1SMA4739A

Public Made by Adom

by adom

Shandong Jingdao Microelectronics Zener Diodes, SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1SMA4739A

Shandong Jingdao Microelectronics · Zener Diodes · SMA

1SMA4739A from Shandong Jingdao Microelectronics, 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 Cathode passive Cathode terminal of the 1SMA zener diode, identified in the datasheet PINNING table and the SMA simplified outline and symbol (page 1).
2 Anode passive Anode terminal of the 1SMA zener diode, identified in the datasheet PINNING table and the SMA simplified outline and symbol (page 1).

Key specifications

Parameter Value
Manufacturer Shandong Jingdao Microelectronics
Package 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 (nominal row, 9.1 V type) VZT 8.6 9.1 9.59 V at IZT = 28 mA; VZT tested with pulses (20 ms) 2
Dynamic impedance ZZT 5 Ω at IZT = 28 mA 2
Reverse current IR 10 µA at VR = 7 V 2
Admissible Zener current IZM 104 mA 2
Power dissipation PD 1 W at Tc = 75°C 1
Junction temperature range TJ -55 150 °C 1
Storage temperature range TS -55 150 °C 1

CAD (KiCad official)

  • Symbol: 1SMA4739A
  • Footprint: Diode_SMD:D_SMA
  • 3D model: SMA (KiCad packages3D, STEP)
  • 3D model files: 1sma4739a-etched.step / 1sma4739a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma4739a.step / 1sma4739a.glb are the bare package body.

Provenance

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

  • Datasheet: Shandong Jingdao Microelectronics datasheet (3 pp, sha256 296be0e2be372196, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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