Most manufacturers provide free PSpice model files (.lib or .mod). In LTspice or ngspice, you can simply add the directive: .lib C:\path\to\your\model.lib
The most accessible free version is . This is not a "light" demo; it is a fully functional simulator created in partnership between Cadence and Texas Instruments.
If you specifically need to run legacy files (.cir, .dat), try these: free pspice simulator
One common frustration: You download a free simulator, but your specific MOSFET or op-amp isn't in the library.
Are you looking to simulate a , like a power supply or an audio amplifier, so I can suggest the right component libraries? Most manufacturers provide free PSpice model files (
Searching for a free PSpice simulator usually leads to two paths: using the official (but limited) "lite" versions or opting for free, industrial-grade alternatives that use the same underlying SPICE engine. 1. Official Free Versions of PSpice PSpice is a proprietary tool owned by Cadence . While the full professional version is a paid product, they typically offer: EMA Design Automation +1 PSpice Lite / Student Version: These are free versions intended for learning. They include the full simulation engine but limit the size of the circuits you can build (usually capped at a certain number of nodes or components). PSpice for TI: A collaboration with Texas Instruments that provides a high-performance version of PSpice for free, specifically optimized for TI's massive library of power and signal chain components. Auburn University +1 2. Best Free Alternatives (SPICE-Based) If the component limits of the PSpice Lite version are too restrictive, these popular simulators are completely free and use SPICE-compatible logic: LTspice: Widely considered the "gold standard" for free simulation. It is a high-performance SPICE simulator provided by Analog Devices (formerly Linear Technology). It has no component limits and a massive community. Micro-Cap: Once a high-end paid software, Micro-Cap was released for free by Spectrum Software. It is incredibly feature-rich and handles complex PSpice models very well. NGSpice: An open-source, command-line-based SPICE engine. It’s the "engine" behind many other free graphical tools like
This is a full-featured, free-to-use version provided by Texas Instruments [28]. It includes a massive library of TI component models and allows for unlimited simulations, making it the most robust free choice for modern designs [6, 28]. If you specifically need to run legacy files (
Finding a that balances power with ease of use is essential for any electrical engineer or student. While the original Cadence PSpice is a premium industry standard, several high-quality free versions and alternatives now provide professional-grade simulation without the high cost. Top Free PSpice Simulators and Alternatives
| | Recommendation | | :--- | :--- | | I want the official PSpice experience | PSpice for TI | | I need to simulate generic transistors/diodes | LTspice | | I have old university PSpice files (.sch) | Micro-Cap 12 | | I design with 90% Texas Instruments chips | PSpice for TI |
You do not need to spend $5,000 to simulate circuits professionally. gives you the official Cadence interface at zero cost, while LTspice gives you unlimited freedom.