File Extension CIR

.CIR File

File extension: CIR
File type: Circuit File


Notes about the CIR file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The CIR file type is primarily associated with 'PSpice' by Cadence Design Systems, Inc.. PSpice is a SPICE analog circuit and digital logic simulation software that runs on personal computers (thus the first letter P in its name). It was developed by MicroSim and used in electronic design automation. MicroSim was bought by OrCAD which was subsequently purchased by Cadence Design Systems. The name is an acronym for Personal Simulation Program with Integrated Circuit Emphasis. Today it has evolved into a analog mixed signal simulator.

Detailed information for file extension CIR:


Primary association: PSpice
Company: Cadence Design Systems, Inc.
File classification: Text

Other applications associated with file type CIR:

  • real-PCB (Netlist) by Crocodile Clips Ltdreal-PCB is a new add-on for Crocodile Technology 410, which imports your electronic circuit simulations and converts them to PCB layouts. This association is classified as CAD/CAM.
  • SuperMax E-CAD Save-File Command



To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension CIR click this link to expand/hide the additional area.

System Info for File Extension .CIR

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: OrCADPSpiceAD10.0.0.cir
EXEFile: C:\OrCAD\OrCAD_10.0_Demo\tools\PSpice\pspice.exe %1

ProgramID: OrCADPSpiceAD10.5.0.cir
EXEFile: C:\OrCAD\OrCAD_10.5_Demo\tools\PSpice\pspice.exe %1

ProgramID: OrCADPSpiceADLE9.20.cir
EXEFile: %ProgramFiles%\OrcadLite\PSpice\pspice.exe

ProgramID: LTspice.Netlist
EXEFile: %ProgramFiles%\LTC\SwCADIII\scad3.exe

ProgramID: RealPCB.CirFile
EXEFile: %ProgramFiles%\RealPCB\realPCB.exe


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