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SMBJ51A

Public Made by Adom

by adom

Taisko Electrostatic And Surge Protection (TVS/ESD), SMB(DO-214AA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componenttvs-fuse-board level protectionsmbj51afactory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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SMBJ51A

Taisko · Electrostatic And Surge Protection (TVS/ESD) · SMB(DO-214AA)

SMBJ51A from Taisko, 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 1 passive Terminal 1 of an unpolarised fuse; either orientation.
2 2 passive Terminal 2 of an unpolarised fuse; either orientation.

Key specifications

Parameter Value
Manufacturer Taisko
Package SMB(DO-214AA)
Category TVS/Fuse/Board Level 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 600 W 10/1000us waveform, non-repetitive (Note1)(Note2) 3
Peak Forward Surge Current IFSM 100 A 8.3ms single half sine wave or equivalent square wave, duty cycle=4 per minute max (Note4) 3
Steady State Power Dissipation PD 5 W Infinite heat sink at TA=50°C (Note3) 3
Maximum Instantaneous Forward Voltage VFM 3.5 V at 50A; unidirectional only; VFM<3.5V for VBR≤200V (Note5) 3
Breakdown Voltage VBR 56.7 62.7 V @ IT = 1 mA 4
Maximum Clamping Voltage VC 82.4 V @ IPP = 7.3 A 4
Maximum Peak Pulse Current IPP 7.3 A 4
Maximum Reverse Leakage Current IR 1 μA @ VR = 51 V 4
Operating Temperature Range TJ -55 150 °C 3
Storage Temperature Range TSTG -55 150 °C 3
Typical Thermal Resistance Junction to Lead RθJL 20 °C/W 3
Typical Thermal Resistance Junction to Ambient RθJA 100 °C/W 3

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 tin Lead Finish: Matte Tin Case Material: Epoxy Molding Compound. 1

CAD (KiCad official)

  • Symbol: SMBJ51A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: smbj51a-etched.step / smbj51a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smbj51a.step / smbj51a.glb are the bare package body.

Provenance

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

  • Datasheet: Taisko datasheet (8 pp, sha256 798a573194fecebd, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal 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