I've read on a Littelfuse page that I2T of a fuse is a measure of the let-through energy. The units of amps^2*resistance is power. Multiply that by time and you have energy. But in a I^2*T rating of a fuse, where is the R? Is 1ohm implied?
I'm trying to predict whether my combination of protection devices will operate as intended: I want the fuse to open and nothing else to be damaged. My circuit is a 840V pulse into a 300uH inductor. On the otherside of the inductor is a 3A fuse (bel 0ADBP3000-RE), with a littefuse sidactor to ground (P3100EALRP1). The load in parallel with the sidactor is the input to another power supply. The fault is is 840V overvoltage pulse.
So basically I'm trying to calculate or plot the power into the sidactor, ideally so it survives until the fuse opens.