Switch current limit in industrial applications refers to the maximum current a switch can handle without overheating or getting damaged. The WAGO PoE Splitter (Item Number. Our Industrial Ethernet Switch portfolio comprises Managed and Unmanaged Switches with Gigabit, PoE, IEC 61850 certification, and for DIN rail mounting. This gives you the flexibility to build powerful and secure networks, even in harsh environments: copper and FO ports, as well as redundancy. This article explains about calculating nominal load current for smart high-side switches, specifically PROFETâ„¢ industrial devices. A minimum current specification indicates the smallest current that can reliably.