component

SMAJ18A

Public Made by Adom

by adom

hongjiacheng ESD And Surge Protection (TVS/ESD), DO-214AC(SMA). 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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docs Publish 0.1.0 · Ray 26d ago
viewers smaj18a: symbol repaired (D_Zener, cathode pad 1) · Ray 3d ago
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page.json Set visibility: public · Ray 26d ago
README.md Publish 0.1.0 · Ray 26d ago
smaj18a-etched.glb Publish 0.1.0 · Ray 26d ago
smaj18a-etched.step smaj18a: factory component page (tier=lcsc) · Ray 26d ago
smaj18a-hero.glb smaj18a: hero GLB from the etched model (keeps the MPN mark) · Ray 26d ago
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smaj18a.glb Publish 0.1.0 · Ray 26d ago
smaj18a.kicad_mod Publish 0.1.0 · Ray 26d ago
smaj18a.kicad_sym smaj18a: symbol repaired (D_Zener, cathode pad 1) · Ray 3d ago
smaj18a.lbr smaj18a: symbol repaired (D_Zener, cathode pad 1) · Ray 3d ago
smaj18a.step Publish 0.1.0 · Ray 26d ago

SMAJ18A

hongjiacheng · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)

SMAJ18A from hongjiacheng, 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 terminal of the unidirectional SMAJ18A, marked by the cathode band on the package, and connected to the protected line (VRWM 18V, VBR 20 to 22.1V at 1mA, VC 29.2V at 13.7A IPP).
2 A passive Anode terminal of the unidirectional SMAJ18A, the end opposite the cathode band, and normally connected to ground (400W peak pulse power at 10/1000µs).

Key specifications

Parameter Value
Manufacturer hongjiacheng
Package DO-214AC(SMA)
Category Circuit Protection
Pins 2

CAD (KiCad official)

  • Symbol: SMAJ18A
  • Footprint: Diode_SMD:D_SMA
  • 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
  • 3D model files: smaj18a-etched.step / smaj18a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smaj18a.step / smaj18a.glb are the bare package body.

Provenance

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

  • Datasheet: hongjiacheng datasheet (5 pp, sha256 3ff5a7b8618e9ea1, retrieved 2026-10-12, 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