Choosing the Right IGBT Module: SKM200GB124D vs. SKM200GB128D

When selecting the appropriate IGBT module for your application, consider the following factors:

Application Requirements

1. Current and Voltage Ratings:
   • SKM200GB124D: 1200V, 200A
   • SKM200GB128D: 1200V, 220A
   • Choose based on the current requirements of your application.
2. Technology and Performance:
   • SKM200GB124D: Uses NPT-IGBT technology for reliable performance and low thermal resistance.
   • SKM200GB128D: Features Soft-Punch-Through (SPT) technology for superior short-circuit protection and higher energy efficiency.
3. Efficiency and Thermal Management:
   • SKM200GB124D: Offers low thermal resistance, ideal for applications with high heat dissipation.
   • SKM200GB128D: Provides a positive temperature coefficient for VCEsat, enhancing energy efficiency.
4. Short Circuit Capability:
   • Both modules have high short-circuit capabilities, but the SKM200GB128D’s SPT technology offers an edge in protection and efficiency.

Typical Applications

• SKM200GB124D: Suitable for switched mode power supplies, DC servo and robot drives, inverters, DC choppers, AC motor speed control, UPS systems, and electronic welders.
• SKM200GB128D: Ideal for AC inverter drives, UPS systems, and electronic welders with higher frequency operations (up to 20kHz).

Key Considerations

1. Current Demand: If your application requires a higher current capacity, the SKM200GB128D (220A) is preferable over the SKM200GB124D (200A).
2. Thermal Management: For applications where heat dissipation is a critical concern, the SKM200GB124D’s low thermal resistance is advantageous.
3. Energy Efficiency: If efficiency is a priority, especially in high-frequency applications, the SKM200GB128D’s positive temperature coefficient VCEsat makes it a better choice.
4. Short Circuit Protection: Both modules provide high short-circuit capability, but the SKM200GB128D’s SPT technology offers enhanced protection.

Conclusion

• SKM200GB124D: Best for applications prioritizing thermal management and moderate current needs.
• SKM200GB128D: Ideal for high current applications requiring superior short-circuit protection and energy efficiency.