For high switching frequencies and output currents

INDUCTORS For high switching frequencies and output currents

2025-04-24 From Würth Elektronik 1 min Reading Time

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Würth Elektronik introduces its new molded flat-wire inductor with the designation WE-PMFI. The compact inductor measures just 2.0 × 1.6 × 1.0 mm in its smallest package. It also has a low resistance, an operating voltage of up to 48 V, as well as an extended temperature range from -55°C to +150°C, making it particularly suitable for DC/DC converter assemblies in compact applications that require high output currents and switching frequencies exceeding one megahertz.

Würth Elektronik expands its range of inductors to include power molded flat-wire inductors.(Source: Würth Elektronik eiSos GmbH & Co. KG) — Würth Elektronik expands its range of inductors to include power molded flat-wire inductors.
(Source: Würth Elektronik eiSos GmbH & Co. KG)

Flat-wire technology offers a host of advantages for inductors: they are mechanically more robust as well as optimized heat dissipation. The wire shape utilizes the winding area more efficiently, allowing for higher inductance values in the same package size as compared to round wire. Flat-wire windings also offer a larger cross-sectional area, thus reducing resistance and I2R losses. Eddy current losses, especially in high-frequency applications, are also lower in a flat-wire inductor compared to the round-wire version. These properties have enabled Würth Elektronik to develop a new generation of components that are more compact, temperature-resistant, and far more energy-efficient. They open up new design options for developers.

Minimum dimensions, maximum efficiency

This small and highly efficient inductor is ideal for powering CPUs and RAM in portable electronic devices, such as smartphones and tablets. Measurements with comparable components on the market have shown that the WE-PMFI has 50 % lower DC resistance, 40 % higher rated current, and 30 % higher saturation current.

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