Maybe someone can solve this mystery for me.... I am making a pinball machine from scratch and trying to figure out which fuses to use on my coil power circuits. My flipper coil has a resistance of 4.5 ohms. Driven at 50 V this suggests a current requirement of just under 12 amps. Yet the typical slow blow fuse in a pinball machine is 3 to 6 A. Why is it that the lower amperage fuses work? I know that a slow blow fuse will tolerate a higher current for a brief period of time but double? Or, does it have more to do with the current not reaching steady state over a 50 ms pulse (possibly) due to the coil inductance? If that is the case, how much current is the coil really pulling? Lastly, what do other people on the forum recommend as specs on the fuse?

Thanks for the observations and advice, Zacaj.