WE-PDF SMD Shielded Power Inductors Würth Elektronik WE-PDF SMD Shielded Power Inductors are suitable for high frequency switching regulators. With magnetic shielding, the flat-wire coil WE-PDF series offers a low leakage field and lower losses at high-frequency ranges. Available in 1064 case size, the Würth Elektronik WE-PDF SMD Shielded Power Inductors operate within an advanced temperature range of -40°C to +150°C.