component

SMF4746A

Public Made by Adom

by adom

amsem Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, 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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smf4746a-etched.step smf4746a: factory component page (tier=lcsc) · Ray 11d ago
smf4746a-hero.glb smf4746a: hero GLB from the etched model (keeps the MPN mark) · Ray 11d ago
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smf4746a.glb Publish 0.1.0 · Ray 11d ago
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SMF4746A

amsem · Zener Diodes · SOD-123

SMF4746A from amsem, in a SOD-123. 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 by the color band; the pin that goes positive in zener (reverse) operation, VZ 18.0 V nominal (17.1 V to 18.9 V) at IZT = 14.0 mA for SMF4746A.
2 A passive Anode, the end without the color band; the 1.0 W zener conducts forward with VF of 1.2 V.

Key specifications

Parameter Value
Manufacturer amsem
Package SOD-123
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 VZ 17.1 18 18.9 V @ IZT = 14.0 mA (SMF4746A, nominal 18.0 V) 2
Maximum Zener impedance ZZT 20 Ω @ IZT = 14.0 mA 2
Maximum Zener impedance ZZK 750 Ω @ IZK = 0.25 mA 2
Maximum leakage current IR 5 µA @ VR = 13.7 V 2
Storage temperature range TSTG -55 175 °C 1
Junction temperature range TJ -55 175 °C 1
Maximum thermal resistance junction to ambient RӨJA 170 K/W Note (2): leads kept at ambient temperature at a distance of 10 mm from case 1

CAD (KiCad official)

  • Symbol: SMF4746A
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: smf4746a-etched.step / smf4746a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smf4746a.step / smf4746a.glb are the bare package body.

Provenance

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

  • Datasheet: amsem datasheet (5 pp, sha256 eb8bcc46788cafda, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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