NEP AGU Fuse 5-Pack (60 Amp)

The fuses fit fine and as far as i can tell are up to par with my equipment. However, the first one i used died(not blew) after sitting in my engine bay. The fuseable portion disconnected from the conector caps on the ends but haven't had any further problems with the second one I've tried.Update: I only have one fuse left. It's important to note that once I installed my amplifier, no settings were change since and I've blown 4 fuses since then. Some of which melted from the heat of my engine bay, while the wasn't even on.