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I want to use a ESD Diode against Vehicle Battery which is rated @ 36V max. I have selected below Diode :-

http://www.nxp.com/documents/data_sheet/PESD36VS1UL.pdf

Now, I am okay with working voltage which is 36V & peak pulse current which is 2.5A. But I could not find any information on continuous current rating. Can someone please explain?

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    \$\begingroup\$ Maybe you want to explain what you want to do with that diode that you need such a rating \$\endgroup\$
    – PlasmaHH
    May 2, 2016 at 9:12
  • \$\begingroup\$ @PlasmaHH - I have my circuit connected to Vehicle Battery of 36V. There are few digital & Analog signals coming from various sensors of Vehicle. I want to protect my 36V power input line & other 36 V signals from ESD. I will take almost 1A continuous current from Vehicle battery @ 36V. \$\endgroup\$
    – Oshi
    May 2, 2016 at 9:15
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    \$\begingroup\$ You really need to add a circuit and show us your protection scheme. The right component in the wrong circuit can offer worse protection than the wrong component in the right circuit. \$\endgroup\$
    – Bimpelrekkie
    May 2, 2016 at 9:16

1 Answer 1

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To protect your installation, the ESD diode will be in parallel to the protected circuit. As far as I can tell, the current used by the circuit is not relevant for the choice of your ESD diode.

There will be a bit of leakage current that is the stats in page 3 of the datasheet : "IRM reverse leakage current". Since this is a protection diode, in normal behavior it will not let flow current through itself. If there is a problem and the voltage rise, at this moment the diode will conduct in order to protect the circuit.

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