I’ll test them with a micro-ohm meter next time I’m in the shop and compare their resistance to comparable MEGA, MIDI, MRBF, CNN, ANN, and Class T fuses of similar amperages, depending on what we have in stock. I have four 250A EF3 fuses that were carried back from German for me. I’ll post my results. MEGA fuses seem to also have high resistance and are usually the component with the highest temperature when we use a thermal camera to measure systems when we load test them prior to delivery. It will be interesting to see if the EF3 fuses are better or worse. I only have four EF3 fuses so my sample size will be small.
There is one USA distributor for Adler products but they don’t stock any EF3. They have to be ordered and have a lead time of 12 weeks by sea, and 5 weeks by air. Worldproducts.com is the distributor that Adler pointed me to. dredemer@worldproducts.com is the guy I have corresponded with.
Once I measure the fuses I’ll replace some MEGA fuses in a system with EF3 fuses and see how they do under continuous load for a while. We have a 24V 5000VA MultiPlus in an RV we are commissioning next week. I’ll send them off with a MEGA fuse, too, in case they have any issues.
Thanks for sharing the information.
P.S. I meant to say that I plan to ask my Victron rep if it’s something they would carry if they work well. I just haven’t had time to really test them but I’ll find some time over the holiday break.