I made a circuit board that fits into the APC rack. It is an Ethernet fuse board. Kinda a belt and suspenders for maximum protection of an CAT5/6 circuit. If a surge suppressor clamps during a major event, this fuse board will blow to prevent damage to a POE supply. Have LEDS on 4 of the 8 pins to detect blown fuses if it is a POE circuit.
Been tweaking the fuse values for about a month. Did the first run of the pre-production part and started testing. I tweaked the fuses to blow about a bit over 2 amps. Started doing some long term burn in runs to check thermal considerations etc. Had the load dialed in to 2 amps. Powered by a Netonics doing 54 volts. It ran for about a half hour before blowing the Netonix port. They say 2 amps surge, 1.5 amps continuous. I think they actually mean it. I was hoping it would survive 2 amps continuous, but it will not. So I have a roll of smt fuses that are worth about $650 that I will not be using unless I release a 1.5 amp and a 2 amp version of this product. RJ45 pins are rated at a half amp each so 2 amps per jack. 2 amps would be a good generic value. Not sure whether to offer two different amp ratings or one.
