Solved
ACST series
I would like to use the ACST series as an AC switch for a 90kHz AC capacitive load. Is this possible?
Peter BENSCHBest answer
ST Technical Moderator
August 22, 2025
No, TRIACs are designed for mains frequency and cannot be used at such high frequencies. In addition, you want to switch a capacitive load, which results in large peak currents.
You might be able to solve your problem with fast IGBTs:
- 600V IGBT - V series - Very high speed (50 to 100 kHz)
- 1200V H series - High speed (20 to 100 kHz) - Products
Hope that helps?
Regards
/Peter
In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.