Miniature shielded power inductors offer current handling performance of larger coils

April 13, 2012 // By Paul Buckley
Coilcraft has introduced the company’s PFL4514 Series Shielded Power Inductors that allow circuit designers to increase board density without sacrificing efficiency. The wirewound surface-mount inductors require 16 mm2 of board space and are 1.4 mm high.

The devices deliver current handling of up to 4.2 A that compares to much larger inductors. Magnetic shielding provides more design flexibility by permitting tighter component spacing without electromagnetic interference.

The Coilcraft PFL4514 Series offers inductance values from 1.0 µH to 22 µH and an operating temperature range of -40 to +125°C. Typical DCR is as low as 80 milliOhms, enhancing performance in battery-powered devices. Where even lower DCR and higher current is required, a 0.3 mm taller part, the PFL4517 Series, is available with DCR starting at 40 milliOhms and saturation current ratings up to 6.5 A. Inductance values for the PFL4517 range from 0.68 µH to 10 µH.

The low-profile inductors are magnetically shielded and share a common footprint for design and prototyping flexibility. Composite-core construction and heavier-gauge windings provide high current handling and excellent DCR. The parts are halogen-free and RoHS-compliant, with matte tin over nickel terminations that are compatible with 260°C processing.

Availability and Pricing

Component pricing at 1,000 piece quantities is $0.50. Delivery is from stock.

More information about the PFL4514 and PFL4517 power inductors at