component

SMDJ18A-AT

Public Made by Adom

by adom

Brightking ESD And Surge Protection (TVS/ESD), SMC(DO-214AB). 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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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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SMDJ18A-AT

Brightking · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)

SMDJ18A-AT from Brightking, in a SMC(DO-214AB). 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 Brightking
Package SMC(DO-214AB)
Category Circuit Protection
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
Peak pulse power dissipation PPPM 3000 W 10/1000μs waveform (Note1, Note2, Fig.1) 1
Breakdown voltage (unidirectional) VBR 20 22.1 V @IT = 1 mA 2
Maximum clamping voltage VC 29.2 V @IPP = 102.7 A (10/1000μs) 2
Reverse leakage current IR 2 μA @VRWM = 18.0 V 2
Reverse stand-off voltage VRWM 18 V Unidirectional (SMDJ18A-AT) 2
Steady state power dissipation PM(AV) 6.5 Watts TA=50℃ (Fig.5) 1
Peak forward surge current IFSM 300 Amps 8.3ms single half sine-wave, superimposed on rated load (JEDEC Method) (Note3, Fig.6) 1
Operating junction and storage temperature range TJ,TSTG -55 150 ℃ 1
Typical thermal resistance junction to lead RθJL 15 ℃/W Typical, junction to lead 1
Typical thermal resistance junction to ambient RθJA 75 ℃/W Typical, junction to ambient 1

CAD (KiCad official)

  • Symbol: SMDJ18A-AT
  • Footprint: Diode_SMD:D_SMC
  • 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
  • 3D model files: smdj18a-at-etched.step / smdj18a-at-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smdj18a-at.step / smdj18a-at.glb are the bare package body.

Provenance

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

  • Datasheet: Brightking datasheet (6 pp, sha256 b9d839ba1f239ec1, retrieved 2026-10-15, 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