Vishay Intertechnology, Inc. (NYSE: VSH) introduced the first device in its new IHSR series of high temperature commercial inductors. Designed for multi-phase, high current power supplies and filters in computer, industrial, and telecom applications, the Vishay Dale IHSR-4040DZ-51 offers a 50% reduction in DCR over typical power inductors and a 20% or greater profile reduction over similar ferrite products. In addition, the inductor boasts an unprecedented standard DCR tolerance of 5%, with 3% available for more accurate current sensing.
With a frequency range up to 5MHz, the device released today is optimized for energy storage in DC/DC converters and high current filtering up to the self-resonant frequency (SRF) of the inductor (see table below). Applications include notebooks, desktop PCs, and servers; low profile, high current power supplies and filters; and DC/DC converters for distributed power systems.
The IHSR-4040DZ-51’s low typical DCR of 0.520mΩ and inductance of 0.130µH allow for higher current density than competing technologies, while its 4mm profile enables slimmer end products. The inductor offers high temperature operation to +155°C, rated current to 92A, and handles high transient current spikes without saturation. The device is available in the 10mm by 10mm 4040 case size; additional case sizes will be offered in the future.
Packaged in a 100% lead (Pb)-free shielded, composite construction that reduces buzz noise to ultra low levels, the inductor offers high resistance to thermal shock, moisture, and mechanical shock. The IHSR-4040DZ-51 is RoHS-compliant, halogen-free, and Vishay Green.
Device Specification Table:
DCR typ. (mΩ)
DCR max. (mΩ)
Heat rating current (A)
Saturation current (A)
63(1) / 92(2)
SRF typ. (MHz)
(1) DC current (A) that will cause L0 to drop approximately 20 %
(2) DC current (A) that will cause L0 to drop approximately 30 %
Samples and production quantities of the inductor are available now, with lead times of 12 weeks for large orders.