IHLP4040DZ-11 Series Magnetically Shielded Wire Wound Chokes. Vishay IHLP-4040DZ-11 series high current low profile shielded inductors. The IHLP-4040DZ-11 series handles high transient current spikes without saturation and has ultra low buzz noise due to its composite construction. Frequency range up to 1.0 MHz Lowest DC Resistance / H in this package size. Applications include: PDA/notebook/desktop/server devices; High current POL converters; Low profile, high current power supplies; Battery powered devices; DC/DC converters in distributed power systems; DC/DC converter for Field Programmable Gate Array (FPGA)