WE-LAN Transformers Würth Elektronik WE-LAN Transformers are fully compliant with IEEE standards and designed with a robust internal layout for a long life. These surface-mount devices feature extended temperature ranges up to +125°C and are compatible with industrial Ethernet systems. Würth Elektronik WE-LAN Transformers are ideally suited for applications such as the Internet of Things (IoT), hubs, routers, switches, and IP cameras.