Vishay Intertechnology Releases Second-Generation Automotive Grade IHLE® Inductor With Integrated EMI Shield in 4040 Case Size

Improved Shield Design Delivers Higher Voltage Ratings, Up to 20 dB of Radiated E-Field Reduction, and Polarity Marking for Additional EMI Control

by gabi

Vishay Intertechnology, Inc. today expanded its IHLE® series of low profile, high current inductors featuring integrated E-field shields with a new second-generation Automotive Grade device in the 10 mm by 10 mm 4040 case size. Offering an improved shield design over previous-generation solutions, and polarity marked for more consistent EMI performance, the Vishay Dale IHLE-4040DDEW-5A lowers costs and saves board space by potentially eliminating the need for separate board-level Faraday shielding.

Compared to traditional composite inductors, the device released today contains the electric and magnetic fields associated with EMI in a tin-plated copper integrated shield. When the shield is connected to ground, the IHLE-4040DDEW-5A provides up to 20 dB reduction in radiated noise interference, and a further 6 dB reduction in magnetic flux leakage to minimize crosstalk to nearby board components. The inductor features continuous high temperature operation to +155 °C and improved operating and isolation voltage ratings of 75 V and 100 V, respectively.

The IHLE-4040DDEW-5A power inductor is optimized for energy storage in switch mode power supplies and provides excellent noise attenuation when used as a DC power line choke. AEC-Q200 qualified, the device is designed for filtering and DC/DC conversion in entertainment / navigation systems; LED drivers; and noise suppression for motors, automotive domain control units (DCU), and other noise-sensitive applications.

Packaged in a 100 % lead (Pb)-free, magnetically shielded, iron alloy encapsulant, the IHLE-4040DDEW-5A offers high resistance to thermal shock, moisture, and mechanical shock from the additional mounting support provided by its two shield terminals. The inductor is RoHS-compliant, halogen-free, and Vishay Green.

Device Specification Table: 

  Low End High End
Inductance @ 100 kHz (μH) 0.47 68
DCR typ. @ 25 °C (mΩ) 1.55 240
DCR max. @ 25 °C (mΩ) 1.66 252
Heat rating current typ. (A)(¹) 32 2.6
Saturation current typ. (A)(²) 28 3.5
Saturation current typ. (A)(³) 40.1 4.9
SRF typ. (MHz) 32.0 3.5
Case size 4040 4040
Part number IHLE4040DDEWR47M5A IHLE4040DDEW680M5A

(¹) DC current (A) that will cause an approximate ΔT of 40 °C
(²) DC current (A) that will cause L0 to drop approximately 20 %
(³) DC current (A) that will cause L0 to drop approximately 30 %

Samples and production quantities of the IHLE-4040DDEW-5A are available now, with lead times of 16 weeks.

Vishay Intertechnology

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