component

1.0SMB18CA

Public Made by Adom

by adom

Liown 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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1.0SMB18CA

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

1.0SMB18CA from Liown, 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 Liown
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
Reverse Stand-Off Voltage VR 15.3 V 2
Breakdown Voltage VB 17.1 18.9 V @IT = 1 mA 2
Test Current IT 1 mA 2
Maximum Clamping Voltage VC 25.2 V @IPP = 40.3 A 2
Peak Pulse Current IPP 40.3 A 10/1000μs waveform 2
Reverse Leakage IR 1 μA @VR 2
Peak pulse power dissipation PPPM 1000 W 10/1000μs waveform, TA=25℃ 1
Steady state power dissipation PM(AV) 5 W TA=50℃ 1
Maximum Instantaneous Forward Voltage (Unidirectional only) VF 3.5 V at 50A, Unidirectional only 1
Peak forward surge current IFSM 100 A 8.3ms single half sine-wave superimposed on rated load, JEDEC Method 1
Operating junction and storage temperature TJ,TSTG -55 150 ℃ 1
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. Each terminal is surface Mounted on the 5.0mm×5.0mm (0.03mm thick) copper pads. 1

CAD (KiCad official)

  • Symbol: 1.0SMB18CA
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: 1-0smb18ca-etched.step / 1-0smb18ca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1-0smb18ca.step / 1-0smb18ca.glb are the bare package body.

Provenance

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

  • Datasheet: Liown datasheet (6 pp, sha256 2ba6389735834e16, retrieved 2026-10-22, 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