Hi, I would like to know how RD in the LED information was found. Ex. In the datasheet of part: LXML-PR02-1100, this information is not present. Thanks.

[RDelf.1]

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[M. Palano]

Hello,

the RD there, stays for Dynamic Resistance.

The dynamic resistance of a diode can be read from its VI characteristic curve, it is dV/dI at the operating point you specified.