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TSM24CA: PESD0402-140 Alternative

Jackson Carmichael
Intellectual 980 points
Part Number: TSM24CA
Other Parts Discussed in Thread: ESDS552, ESD761

Hello

I am looking for an alternative to the PESD0402-140, I found that the TSM24CA may be a good option (matching the 40Vclamping and bidirectional protection, and coming in way lower on leakage current), but would you say this is the best alternative to consider? If so, would it fit in the 0402 socket that the PESD0402-140 is in?

Thanks!

  • +1
    TI__Expert 6070 points

    Hi Jackson,

    Below I have attached our best p2p option (ESD761) and our best non p2p option (ESDS552):

      PESD0402-140 ESD761 ESDS552
    Vrwm (V) 14 24 12
    Package Type DFN-1006 DFN-1006 SOT-23
    Nominal Package Size            (L x W) (mm) 1.0 x 0.6 1.0 x 0.6 2.92 x 2.37
    Bi-/uni-directional Bi-directional Bi-directional Bi-directional
    Number of Channels 1 1 2
    Clamping Voltage (V) 40 36.3 23.8
    IO Capacitance (typ) (pF) 0.25 1.1 9
    IEC 61000-4-5 (A) - 1.8 20
    IEC 61000-4-2 Contact (kV) 8 15 30
    Max Leakage Current (nA) 10000 50 50

    ESD761 has a higher working voltage, but has similar/better specs outside of capacitance. ESDS552 has a much closer working voltage, but isn't p2p and has a much higher capacitance. Do you know which of these your customer would prefer?

    In addition, the competitor device has a very high trigger voltage (250V). Is this very high trigger voltage required for the application, or is this simply a feature of the device that is being used? 

    Please let me know if you have any questions!

    Best Regards,

    Josh Prushing

  • 0 in reply to Josh Prushing
    TI__Intellectual 980 points

    Hi Josh!

    Really appreciate this detailed response. I'll propose both devices to my customer and get back to you on the details you asked for.