How It Works


ezIGBT believes it should be simple to find the right IGBT for your circuit.

We make it easy for the worldwide IGBT community to analyze and compare parts from many manufacturers in similar conditions.

Today's datasheets are cumbersome and static, making it difficult to understand how a particular part will perform in your circuit.

ezIGBT liberates datasheet data from paper and allows designers to model how a part performs under specific conditions of temperature, PWN frequency, heatsink size, voltage, and current.


ezIGBT goes to great lengths to ensure that our part models and data are accurate and up-to-date.

Our process roughly follows this format for a given part:

  1. The Vceon, diode Vf, Eon, Eoff, and diode Err are converted to equations based on industry standard techniques. These equations are created in two sets: one at 25C, and the other at the highest Tj available.
  2. The parameters are linearly interpolated between these temperatures, and these equations are used to calculate losses and thermal conditions for the devices.
  3. As the datasheet graphs are curve-fitted, we expect errors of no more than 10% - less than the normal manufacturing variations in these devices.
  4. In cases when the manufacturer does not provide curve data, specific data is requested from the manufacturer and reasonable assumptions are made to obtain parameter values.
  5. All model data is based on "typical curves" published by manufacturers. The variation between typical and maximum values varies between manufacturers and part types. Please consult the product datasheet to obtain this information.
  6. Currently, all technical calculations use "hard switching" convertors (as opposed to resonant operation). In the future, we may extend this operation to various resonant mode convertors for applications such as IH or welding.


We currently support tools to Analyze, Compare, and Recommend parts. More tools will be added very soon! Dont hesitate to contact us if you have an idea for a useful tool - were always listening.


Under the Analyze tab, the following functions are currently available:

  • Understand the Vceon and Ets at your Tj (for the desired current range)
  • Calculate power loss vs. frequency at your Tj and Duty Cycle
  • Predict what heat sink size you will need
  • Understand how your losses are split between conduction and switching components between the IGBT and the diode
  • Compute the current vs. frequency curve for your Duty Cycle and thermal conditions


The Compare tab allows you to run the analyses found in the Analyze section, but with the additional ability to compare multiple IGBTs.


Choose your conditions, and ezIGBT will recommend the parts that are most suited to your application. Currently, the best parts are chosen based on the dTj rise over the Tcase. In the future, well be adding other criteria such as best efficient, package type, and much more.


ezIGBT is free to use! Were here to help designers find the right part for their applications.

In order to download any technical output (as PDF, CSV, etc), you must first register with ezIGBT. We take your privacy very seriously, and will never sell your email or spam you. We will use your email address to announce new improvements to the site and toolkit.