Compliance of IEC61010-1 and VDE0884-10

Hello,

 

I am confused about the safety ratings of the part ADuM4120. Its datasheet states reinforced insulation for a working voltage of 400Vrms to meet IEC61010-1, while the rating for reinforced insulation with VDE0884-10 is 849Vpeak.

 

According to the section 14 of IEC61010-1, this norm accepts any part meeting another recognized safety standard. This means that ADuM4120 would meet reinforced insulation for 849Vpeak because it complies with VDE0884-10. So, why the rating specified for IEC61010-1 in the datasheet is lower (400Vrms)?

 

Thank you in advance.

Parents
  • Hello Mark,

    Thank you for this information. I see that the maximum recommended voltage is 600Vrms at 60Hz (lifetime of 20 years with 0.1% of failure rate).

     

    These data lead me to question the effect of the frequency of the AC signal across the barrier on the lifetime of the isolator. This is important for my design because it should deal with frequencies up to 5MHz. After spending several hours reading about this topic, it is clear that the barrier can degrade faster at higher frequencies. However, I have found no models relating the lifetime with the frequency. Do you know any data or bibliographic reference where I can find information about this topic?

     

    Best regards,

    Victor M.

Reply
  • Hello Mark,

    Thank you for this information. I see that the maximum recommended voltage is 600Vrms at 60Hz (lifetime of 20 years with 0.1% of failure rate).

     

    These data lead me to question the effect of the frequency of the AC signal across the barrier on the lifetime of the isolator. This is important for my design because it should deal with frequencies up to 5MHz. After spending several hours reading about this topic, it is clear that the barrier can degrade faster at higher frequencies. However, I have found no models relating the lifetime with the frequency. Do you know any data or bibliographic reference where I can find information about this topic?

     

    Best regards,

    Victor M.

Children
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