component

SMBJ43A-AT

Public Made by Adom

by adom

Brightking Elec (TAIWAN) TVS, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcircuit protectionsmbj43a-atfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 11d ago
viewers smbj43a-at: viewers · Ray 11d ago
package.json Publish 0.1.0 · Ray 11d ago
page.json Set visibility: public · Ray 11d ago
README.md Publish 0.1.0 · Ray 11d ago
smbj43a-at-etched.glb Publish 0.1.0 · Ray 11d ago
smbj43a-at-etched.step smbj43a-at: factory component page (tier=lcsc) · Ray 11d ago
smbj43a-at-hero.glb smbj43a-at: hero GLB from the etched model (keeps the MPN mark) · Ray 11d ago
smbj43a-at-hero.overlay.json Publish 0.1.0 · Ray 11d ago
smbj43a-at.glb Publish 0.1.0 · Ray 11d ago
smbj43a-at.kicad_mod Publish 0.1.0 · Ray 11d ago
smbj43a-at.kicad_sym Publish 0.1.0 · Ray 11d ago
smbj43a-at.lbr Publish 0.1.0 · Ray 11d ago
smbj43a-at.step Publish 0.1.0 · Ray 11d ago

SMBJ43A-AT

Brightking Elec (TAIWAN) · TVS · SMB(DO-214AA)

SMBJ43A-AT from Brightking Elec (TAIWAN), in a SMB(DO-214AA). 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, identified by the color band on the unidirectional SMBJ43A-AT (43 V VRWM, 47.80~52.80 V VBR at 1 mA, 69.4 V max VC at 8.7 A IPP).
2 A passive Anode terminal of the unidirectional SMBJ43A-AT, which sits opposite the cathode band end and carries the 600 W 10/1000μs peak pulse rating.

Key specifications

Parameter Value
Manufacturer Brightking Elec (TAIWAN)
Package SMB(DO-214AA)
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
Breakdown Voltage VBR 47.8 52.8 V @IT=1mA 3
Maximum Clamping Voltage VC 69.4 V @IPP=8.7A 3
Reverse Leakage IR 1 μA @VRWM=43V 3
Peak Pulse Current IPP 8.7 A 10/1000μs waveform 3
Peak pulse power dissipation PPPM 600 Watts 10/1000μs waveform, Minimum 1
Steady state power dissipation PM(AV) 5 Watts TA=50℃ 1
Peak forward surge current IFSM 100 Amps 8.3ms single half sine-wave superimposed on rated load, JEDEC Method 1
Operating junction and storage temperature TJ,TSTG -55 150 ℃ 1
Reverse Stand-Off Voltage VRWM 43 V 3
Thermal resistance junction to lead RθJL 20 ℃/W Typical 1
Thermal resistance junction to ambient RθJA 100 ℃/W Typical 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper 2. Mounted on 5.0mm×5.0mm (0.03mm thick) copper pads to each terminal. 1

CAD (KiCad official)

  • Symbol: SMBJ43A-AT
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: smbj43a-at-etched.step / smbj43a-at-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smbj43a-at.step / smbj43a-at.glb are the bare package body.

Provenance

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

  • Datasheet: Brightking Elec (TAIWAN) datasheet (7 pp, sha256 a2bc93a3b45c5e72, retrieved 2026-10-22, tier: lcsc)
  • 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