component

1.5SMB43A

Public Made by Adom

by adom

Littelfuse ESD And Surge Protection (TVS/ESD), DO-214AA(SMBJ). 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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1.5SMB43A

Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMBJ)

1.5SMB43A from Littelfuse, in a DO-214AA(SMBJ). 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 Littelfuse
Package DO-214AA(SMBJ)
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 1500 W 10/1000μs waveform (Fig.2) (Note 1), (Note 2) 1
Power Dissipation on Infinite Heat Sink PD 5 W at TL=50°C 1
Peak Forward Surge Current IFSM 120 A 8.3ms single half sine wave (Note 3) 1
Maximum Instantaneous Forward Voltage VF 5 V at 50A for Unidirectional only 1
Operating Temperature Range TJ -65 150 °C 1
Storage Temperature Range TSTG -65 175 °C 1
Breakdown Voltage VBR 40.9 45.2 V @ IT, test current 1 mA 2
Maximum Clamping Voltage VC @ Ipp (10/1000μs) VC 59.3 V @ Ipp (10/1000μs) 2
Maximum Peak Pulse Current Ipp (10/1000μs) Ipp 25.6 A 10/1000μs 2
Maximum Clamping Voltage VC @ Ipp (8/20μs) VC 76.6 V @ Ipp (8/20μs) 2
Maximum Peak Pulse Current Ipp (8/20μs) Ipp 140.8 A 8/20μs 2
Maximum Reverse Leakage Current IR 1 µA @ VR 2
Maximum Temperature coefficient of VBR 0.098 %/C 2
Reverse Stand off Voltage VR 36.8 V 2
Typical Thermal Resistance Junction to Lead RθJL 20 °C/W 1
Typical Thermal Resistance Junction to Ambient RθJA 100 °C/W 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 tin • Matte tin lead-free Plated • Halogen free and RoHS 1

CAD (KiCad official)

  • Symbol: 1.5SMB43A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: DO-214AA(SMBJ) (KiCad packages3D, STEP)
  • 3D model files: 1-5smb43a-etched.step / 1-5smb43a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1-5smb43a.step / 1-5smb43a.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 edddb435792266f3, retrieved 2026-10-16, 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