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ISO1050: Isolation capabilities as per IEC60664

Josel Go
Expert 5980 points
Part Number: ISO1050
Other Parts Discussed in Thread: ISO1042, ISO1540

Hi Experts,

Our customer is investigating the use of the CAN transceiver (ISO1050) for their application. They would like to understand isolation capabilities as per IEC60664. Is there a maximum rated isolation voltage for DC as per IEC60664? They can only see AC on the datasheet.

Would you be able to find this information? Would the DC rating equal the AC peak values given in the data sheets?  They are looking to confirm a rated DC voltage of 806V ( or 1000VDC preferred) as per IEC 60664. Is there data to confirm this?

Regards,

Joselito Go

  • 0
    Guru 317260 points

    What specific parameter defined in IEC-60664 are you referring to? The rated mains voltage in table F.1 can be read as either AC or DC. In that case, the ISO1050 allows only category I, and only in the DW package; you should use the ISO1042, which allows overvoltage categories I … III for 1000 VDC.

  • 0 in reply to Clemens Ladisch
    TI__Expert 5980 points

    Hi Clemens,

    Thanks for your prompt reply, I believe that you have answered my question. I wanted to confirm if the Rated mains voltage of 848V RMS would also apply to DC ( yellow below). From my interpretation of your email, the component would also have a rated insulation voltage of 848V DC. Please correct me if I have misunderstood.

    OV Cat 1 is also fine for our application, as we require a rated impulse of 2,5KV

    Regards,

    Joselito Go

  • 0 in reply to Josel Go
    TI__Genius 11765 points

    Hi Joselito,

    Yes, ISO1050DWR can withstand 848 VDC working voltage without an issue. RMS voltage impacts the isolation barrier more than the equivalent DC voltage.

    Thanks,
    Saleem Marwat

  • 0 in reply to Josel Go
    TI__Mastermind 29375 points

    Hello Joselito,

    The VRMS voltage can be converted to VDC. The ISO1540 will have a Maximum working voltage of 848Vrms and 1200VDC

    Best,
    Andrew