Automotive grade inductors feature e-shield to lower costs

29th November 2016
Alice Matthews

The series of low-profile, high-current inductors from Vishay Intertechnology has been expanded to feature integrated e-shields for reduction of EMI with automotive grade devices in the 2525, 3232 and 4040 case sizes. The Vishay Dale IHLE-2525CD-5A, IHLE-3232DD-5A, and IHLE-4040DD-5A lower costs and save board space by eliminating the need for separate board-level Faraday shielding. 

The devices contain the electric field associated with EMI in a tin-plated copper integrated shield, providing up to -20dB of electric field reduction at 1cm (above the centre of the inductor) when the integrated shield is connected to ground.

Featuring high-temperature operation to 155°C and coplanarity of their four terminals within ≤100µm, the AEC-Q200-qualified inductors released today are optimised for energy storage in DC/DC converters and high-current filtering for automotive engine and transmission control units, diesel injection drivers, noise suppression for motors, windshield wipers, power mirrors and seats, entertainment/navigation systems and HID lighting. In addition, the devices' 4-terminal connection (two ground connection points for the shield) provides high-vibration performance for on-engine and chassis-mounted electronic circuits.

Built on Vishay Dale IHLP technology, the IHLE-2525CD-5A, IHLE-3232DD-5A, and IHLE-4040DD-5A feature high efficiency with typical DCR from 1.55-167mΩ and a range of inductance values from 0.22-47µH. The devices provide rated currents to 36A and handle high transient current spikes without saturation. Packaged in an RoHS-compliant, 100% lead (Pb)-free shielded construction, the inductors offer high resistance to thermal shock, moisture, and mechanical shock. The devices are halogen-free and Vishay Green.

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