NL5 Circuit Simulator

NL5 Circuit Simulator

Reliable Simulation with Ideal Components

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NL5 News



NL5 Version 3.10 released
September 1, 2023

NL5 Version 3.10 has been released. Please see this updates topic for details.


NL5 Version 3.9 released
June 23, 2023

NL5 Version 3.9 has been released. Please see this updates topic for details.


Free NL5 lite released
June 11, 2023

Free NL5 lite has been released. It does not require a license, and performs simulation with unlimited components and same performance as a standard NL5.


NL5 to be presented at PCIM Europe 2023
April 16, 2023

Finally!... Meet us at PCIM Europe 2023 in Nuremberg, Germany, May 9-11, Hall 6, Booth 258. Learn more about NL5 features and capabilities: it could be a good tool for your new project! If you have already tried NL5, we will be happy to hear about your experience and help with problems.


NL5 Version 3.8 released
February 24, 2023

NL5 Version 3.8 has been released. Please see this updates topic for details.


NL5 lite released
January 11, 2023

NL5 lite has been released. It has the same set of components, simulation algorithm, and performance as a standard NL5 Ver.3, with a simplified user interface and discounted NL5 lite License for unlimited number of components.


NL5 Version 3.7 released
December 18, 2022

NL5 Version 3.7 has been released. Please see this updates topic for details on User Interface change.


NL5 Version 3.6 released
October 17, 2022

NL5 Version 3.6 has been released. More fixes and improvements in algorithm, script, and interface.


NL5 Version 3.5 released
July 7, 2022

NL5 Version 3.5 has been released. New models, features and algorithm improvements, more are coming soon.


NL5 Version 3.4 released
February 2, 2022

NL5 Version 3.4 has been released. Many minor non-critical bugs reported by users have been fixed. Thank you for your feedback!


NL5 Version 3.3 released
January 1, 2022

NL5 Version 3.3 has been released. Now you can use one NL5 License file for both NL5 Ver.3 and Ver.2. If you like NL5 Ver.2, please be aware that Ver.2 build 2.74 is available for download. You can also buy NL5 Ver.2 license at discounted price.


NL5 Version 3.2 released
August 1, 2021

NL5 Version 3.2 has been released. Many thanks to active users for reporting bugs and providing valuable suggestions! Order trial or permanent License here.


NL5 Version 3.1 released
July 1, 2021

NL5 Version 3.1 has been released. 64-bit application with improved switching algorithm and many new components, models, and features. Up to 5 times faster for most circuits. Order trial or permanent License here.


NL5 Version 3 (beta) is available for trial
June 24, 2020

NL5 Version 3 (beta) is available for trial. You have a unique opportunity to evaluate a software which is still in development, make suggestions, and even request anything you would like to have in a released version.


NL5 won't be presented at PCIM Europe 2020 - cancelled...
March 21, 2020

Meet us at PCIM Europe Exposition and Conference PCIM Europe 2020 in Nuremberg, Germany, July 28-30, 2020 (hall 6, booth 351).


NL5 and NL5 DLL version 2.7 released
February 20, 2020

NL5 and NL5 DLL version 2.7 have been released. Starting from this version, NL5 DLL is part of NL5 package, and it has the same version and revision number as NL5 Circuit Simulator. Please note that NL5 DLL can only work with "DLL-enabled" files, created with License with DLL option. Without that option, DLL will simulate only schematics with 10 components or less. The License with DLL option can be purchased here. Contact us to add DLL option to the existing License.


NL5 version 2.6 released
September 29, 2019

NL5 version 2.6 has been released. Download latest version of NL5 here.


NL5 Circuit Simulator at Wiki
March 30, 2019

NL5 Circuit Simulator article is available on Wikipedia.


NL5 version 2.5 released
June 10, 2018

NL5 version 2.5 has been released. Download latest version of NL5 here.


NL5 to be presented at DAC 2018
April 26, 2018

Meet us at Design Automation Conference DAC 2018 in San Francisco, CA, June 25-27, 2018 (booth 2122).


Introducing NL5 DLL beta
March 30, 2018

NL5 DLL beta is available for download.
  -  full-functional high performance NL5 simulation engine
  -  simple and intuitive API functions
  -  SystemVerilog DPI support


NL5 version 2.4 released
January 23, 2018

NL5 version 2.4 has been released. Download latest version of NL5 here.


NL5 Exhibitor Seminar at APEC 2018
January 15, 2018

Never heard of NL5? Just started? Experienced user? Everybody has a chance to learn something new about NL5 at APEC 2018 exhibitor seminar "NL5 - Circuit Simulator With Ideal Components". See you Wednesday, March 7, 11:15am - 11:45am, room 217B. Don't forget, this is in San Antonio, TX!


NL5 to be presented at APEC 2018
September 30, 2017

Meet us at Applied Power Electronics Conference and Exposition APEC 2018 in San Antonio, TX, March 5-7, 2018 (booth 1459).


New License types and pricing
June 14, 2017

We are happy to offer new License types for Companies. The purpose of new Licenses is to simplify NL5 distribution and support across the Company, increase efficiency of product development, analysis, and verification.

For the first time in almost 8 years, License prices have been adjusted too. We hope you will continue enjoying NL5 new features, improvements, and excellent customer support!


NL5 version 2.3 released
June 6, 2017

NL5 version 2.3 has been released. Download latest version of NL5 here.


NL5 version 2.2 released
April 21, 2016

NL5 version 2.2 has been released. Use a new trace type, Math, to post-process simulation data. Download latest version of NL5 here.


NL5 version 2.1 released
February 1, 2016

NL5 version 2.1 has been released. Get data from oscilloscope, build your DLL automatically with Microsoft Visual C++, display digital and bus signals, try new components and models, and much more. Download latest version of NL5 here.


NL5 to be presented at APEC 2016
August 10, 2015

Meet us at Applied Power Electronics Conference and Exposition APEC 2016 in Long Beach, CA, March 21-23, 2016 (booth 1163).


Frequently Asked Questions page is available
April 19, 2014

A new Frequently Asked Questions page is available. Have a problem? Check FAQ page first. Don't see what you need? Submit your question here, send us an email to nl5@sidelinesoft.com, or post your question at NL5 forum.


NL5 version 2.0 released
January 14, 2014

NL5 version 2.0 has been released. Many changes in C language and script: new data types, operators, and functions. Download latest version of NL5 here.


NL5 to be presented at APEC 2014
December 7, 2013

Meet us at Applied Power Electronics Conference and Exposition APEC 2014 in Fort Worth, TX, March 17-19, 2014 (booth 709).


NL5 to be presented at ECCE 2013
August 13, 2013

Meet us at IEEE Energy Conversion Congress and Exposition ECCE 2013 in Denver, CO, September 16-17 (booth 115). Enjoy Colorful Colorado: home of NL5!


ideal-Z - simple impedance calculator
February 8, 2013

Try ideal-Z: a simple impedance calculator with graphical schematic entry. Just drop components onto the schematic, connect them, set values, and the impedance is calculated instantaneously.


NL5 version 1.9 released
December 12, 2012

NL5 version 1.9 has been released. Try a new method of low signal AC analysis for switching circuits: Z-transform. Download latest version of NL5 here.


idealCircuit released
June 9, 2012

idealCircuit uses the same algorithm as NL5. However, it is simplified as much as possible: very simple and intuitive interface, less components and models, no fancy and powerful features. idealCircuit is free, no license needed.


NL5 version 1.8 released
February 1, 2012

NL5 version 1.8 has been released. Less bugs, more tools, models, and features. Download latest version of NL5 here.


NL5 Circuit Simulator on Facebook
July 29, 2011

Visit NL5 on Facebook: read latest news, recommend NL5 to your colleagues, share with friends, just "like" it!


NL5 to be presented at ECCE 2011
July 23, 2011

Meet us at IEEE Energy Conversion Congress and Exposition ECCE 2011 in Phoenix, AZ, September 19-20 (booth 401). Dive into smart technology with a smart tool!


NL5 version 1.7 released
April 30, 2011

NL5 version 1.7 has been released. As always, a lot of new components, models, features, and improvements. Students special: see what\'s inside transmission line. Watch NL5 Demo video on YouTube; more tutorial topics are coming soon. Download latest version of NL5 here


APEC 2011 special offers
February 20, 2011

We are happy to offer great APEC 2011-special discounts, and give away NL5 Single PC License! Offers are valid through March 13, 2011.


NL5 version 1.6 released
November 1, 2010

NL5 version 1.6 has been released. More features and components, less bugs. Visit the download page to get the latest version of NL5.


NL5 version 1.5 released
April 20, 2010

NL5 version 1.5 has been released. Power engineers special: calculate Power Factor and THD; use bridge rectifier component to make you schematic look nicer. Visit the download page to get the latest version of NL5.


NL5 version 1.4 released
January 11, 2010

NL5 version 1.4 has been released. Enjoy thyristor, soft reverse recovery diode, and many other features. Look forward to see even more in the following builds. Visit the download page to get the latest version of NL5.


NL5 to be presented at APEC 2010
December 17, 2009

Meet us at Applied Power Electronics Conference and Exposition APEC 2010 in Palm Springs, CA, February 22-24, 2010 (booth 333). Recover from the recession with a new simulation tool!


NL5 version 1.3 released
September 9, 2009

NL5 version 1.3 has been released. It finalized many significant improvements and additions introduced in several builds of version 1.2. Watch upcoming builds for more great features: the NL5 "to-do list" is getting longer following rapidly growing interest in NL5.


Microsoft security update 896358 issues
August 9, 2009

A new problem related to Microsoft security updates has been discovered: an error while opening Help file after installing security update 896358. A quick resolution is:

  • Right-click the nl5.chm file, and then click Properties
  • Click Unblock
Alternately, see Microsoft Help and Support topic 902225 External link for other solutions and more details.


NL5 Network License available
July 25, 2009

The NL5 Network License provides full functionality on an unlimited number of PCs connected to the NL5 License Server through the network. Network License is offered for FREE to educational institutions, both for educational purposes and research. Contact us for technical details and pricing for companies and individual users.


NL5 to be presented at ECCE 2009
June 28, 2009

Meet us at IEEE Energy Conversion Congress and Exposition ECCE 2009 in San Jose, CA, September 21-23, 2009 (booth 34). See NL5 in action, ask questions, discuss your simulation problems, and get them solved with NL5.


NL5 version 1.2 released
June 28, 2009

NL5 revision 1.2 has been released. It has many new components, models, and features available, including direct data exchange with external applications through HTTP link, C-block with custom code written on C language or using DLL, Undo/Redo of schematic editing, and much more. As always, some critical bugs are fixed, and noticeable improvements of the algorithm have been made. Please see details in the updated Manual.


NL5 version 1.1 released
March 9, 2009

Version 1.1 has been released. Demo version is fully functional, except a limited number of components in the schematic (20). Several new components, models, and features have been added. Reminder to NL4 users: NL4 schematic files will not be supported in the next revision. Please convert all old files to the NL5 format.


NL5 version 1.0 released
January 1, 2009

Version 1.0 has finally been released. Without license, NL5 operates as a Demo version with limited functionality.

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