Selecting the right IGBT module is critical for the performance, reliability, and cost-effectiveness of your power electronics project. As a leading Starpower distributor, we've helped hundreds of engineers navigate this process. This guide breaks it down into three simple steps.

Step 1: Define Your Application's Key Electrical Parameters

Before looking at any datasheets, you must first define your system's requirements. The two most important parameters are:

A. Blocking Voltage (Vces)

The IGBT's voltage rating must be higher than the maximum DC bus voltage it will experience. A safety margin is crucial. A common rule of thumb is to select an IGBT with a Vces rating that is at least 1.5 to 2 times the nominal DC bus voltage.

  • 400V AC System: DC Bus ≈ 560V. Choose a 1200V IGBT module.
  • 230V AC System: DC Bus ≈ 320V. Choose a 600V or 650V IGBT module.

B. RMS and Peak Current (Ic)

You need to calculate the maximum continuous RMS current and the peak repetitive current your load will draw. Select a module where its rated continuous collector current (Ic) at your expected case temperature (e.g., 80°C) is comfortably above your calculated RMS current. For example, for a 30A RMS load, a module rated for 50A like the GD50HFL120C1S provides a good safety margin.

Step 2: Consider Switching Frequency and Losses

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Need Expert Assistance?

This guide provides a great starting point, but every application is unique. As an authorized Starpower agent, our team of experienced FAEs can provide personalized recommendations based on your specific project requirements.

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