What the title says, what is this part for? It’s always optional and from the specs it seems it only increases power drain and emissions.
My understanding is that it does nothing but harden the module. It increases power/emissions, but also provides an “S.R.” rating, which adds sturdiness: https://oiswiki.sysadninjas.net/wiki/Short_Buffer
I’ve read it reduces damage from charged nebulae.
I’ve always taken it as something to help in the fight against short circuiting…