Guidelines for pulse rating of standard thick film resistors

Thread Starter


Joined May 16, 2019

Many manufacturers offer pulse rated thick film resistors, and publish detailed information on the pulse rating. Curves of duration vs. peak power are provided. For the standard resistors, I'm coming up with no information on the pulse rating. In applications where the pulse rating is vastly below the pulse rated resistors, but still say 10X or 20X the resistor rating, how do you know where the line is that requires the pulse rating?

Right now the biggest concern over the pulse rated resistors is the lead time. Many are 26-52 weeks. I'm being asked "do you really need it?" by purchasing. Anyone know if there is less widely distributed data from the manufacturers on the pulse ratings of the standard thick film parts?