component

KSMBJ51A-E3

Public Made by Adom

by adom

KUU ESD And Surge Protection (TVS/ESD), SMB. 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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KSMBJ51A-E3

KUU · ESD And Surge Protection (TVS/ESD) · SMB

KSMBJ51A-E3 from KUU, in a SMB. 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 KUU
Package SMB
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 (minimum) at IT VBL 56.7 V @IT = 1 mA 3
Breakdown voltage (maximum) at IT VBH 62.7 V @IT = 1 mA 3
Maximum reverse leakage current IR 1 uA @VRWM (VR = 51 V) 3
Maximum peak pulse current IPP 7.3 A 3
Maximum clamping voltage VCH 82.4 V @IPP = 7.3 A 3
Peak pulse power dissipation PPPM 600 Watts 10/1000us waveform (Note1, Fig.1); printed as 'Minimum' 1
Steady state power dissipation PM(AV) 5 Watts TL=75℃, lead lengths .375" (9.5mm) (Fig.5) 1
Peak forward surge current IFSM 100 Amps 8.3ms single half sine-wave superimposed on rated load, JEDEC method (Note 2, Fig.6) 1
Operating junction and storage temperature range TJ, TSTG -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: KSMBJ51A-E3
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: ksmbj51a-e3-etched.step / ksmbj51a-e3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ksmbj51a-e3.step / ksmbj51a-e3.glb are the bare package body.

Provenance

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

  • Datasheet: KUU datasheet (4 pp, sha256 1baf0da9cb3153fe, 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