LTspice: Simple Steps to Import Third-Party Models

It is possible in LTspice IV to create a new symbol from scratch for a third-party model but who has the time? Follow these easy steps to generate a new symbol for a third-party model defined in a subcircuit (.SUBCKT statement).

  1. Open the netlist file that contains the subcircuit definitions in LTspice (File > Open or drag file into LTspice)
  2. Right-click the line containing the name of the subcircuit, and select Create Symbol:


    Create Symbol

    Create Symbol

  3. Edit the symbol if needed and save.

To use the new symbol (and associated third party model) in a schematic, select the symbol from the AutoGenerated directory in the component library (F2) and place it in your schematic:


Select Component Symbol
Select Component Symbol

By using the automatic symbol generation you can focus on your simulations, not creating new symbols. For a more information on how to import third party models that use intrinsic SPICE device (.MODEL statement) see the video at



Gabino Alonso

Gabino Alonso is currently the director of strategic marketing for the Power by Linear™ Group. Prior to joining ADI, Gabino held various positions in marketing, engineering, operations, and education at Linear Technology, Texas Instruments, and California Polytechnic State University. He holds a Master of Science degree in electrical and computer engineering from University of California, Santa Barbara.