WE-RFI & WE-RFH Ferrite SMD Inductors Würth Elektronik WE-RFI and WE-RFH Ferrite SMD Inductors feature high current handling capability and are primarily used for radio frequency identification (RFID) tuning. The WE-RFH has a higher current handling capability and is available in 1008A size only. The WE-RFI series is available in 0805A and 1008A sizes. Würth Elektronik WE-RFI and WE-RFH Ferrite SMD Inductors operated in a temperature range of -40°C to +85°C.