What Happened Würth Elektronik has launched the WE-SFIA series of flat wire inductors in three package sizes — 2010, 2013, and 2016. The components handle saturation currents up to 150A, cover an inductance range of 0.33 µH to 4.7 µH, and are rated for -40°C to +180°C operating temperatures. They’re designed specifically for automotive DC/DC converter applications including buck and boost topologies.
Context DC/DC converters in EVs and hybrids — managing battery management systems, motor drives, audio, and infotainment — operate under sustained high-current loads in thermally punishing environments. Component selection in these stages is critical: inductors that can’t handle the heat or current without significant derating become reliability liabilities over a vehicle’s lifetime.
Why It Matters Flat wire winding packs tighter than conventional round wire, which translates to lower DC resistance, better thermal performance, and stronger mechanical integrity. The -40°C to +180°C range means these components can handle under-hood thermal cycling without derating concerns. At up to 150A saturation current, they’re built for the kind of sustained loads that automotive power stages regularly demand.
Our Take Automotive power design keeps pushing component limits — tighter packaging, higher currents, more heat. For engineers designing DC/DC stages in EVs or hybrid systems where sustained high-current operation and thermal headroom are non-negotiable, flat wire inductors in automotive-grade packages are exactly the right direction.
