WE-MK Multilayer Ceramic SMD Inductors Würth Elektronik WE-MK Multilayer Ceramic SMD Inductors are available in small package sizes and feature windings printed on a ceramic substrate. These inductors are thermally stable and do not show any variation in inductance over a large temperature range. Additional features include high >,17GHz self-resonant frequency, 5% inductive tolerance, and -40°C to +120°C operating temperature range. Applications for Würth Elektronik WE-MK Multilayer Ceramic SMD Inductors include high-frequency circuits, BLUETOOTH®, wireless LAN, filter circuits, laptops, and more.