Shielded Inductors Reduce Emissions in Tight Layouts

Why It Matters

The compact, shielded design enables higher‑current DC‑DC converters in space‑constrained products while preserving signal integrity and simplifying EMC compliance, reducing redesign costs.

Key Takeaways

• 2 mm×1.6 mm×0.8 mm footprint fits tight PCB spaces
• Shielded metal‑alloy core cuts emissions and trace coupling
• Supports up to 5.5 A saturation current for high‑power converters
• DC resistance as low as 36 mΩ improves efficiency
• Operates from –40 °C to +125 °C for rugged applications

Pulse Analysis

Miniaturization is reshaping power‑electronics design, pushing inductors into ever‑tighter footprints. As devices such as wearables, IoT sensors, and electric‑vehicle subsystems shrink, engineers grapple with higher switching frequencies and denser component placement, which can spark radiated emissions and magnetic coupling. Traditional unshielded inductors often require generous clearance or additional filtering, inflating board size and bill of materials.

Bourns’ SRP2008DP series tackles these challenges head‑on. Housed in a 2.0×1.6×0.8 mm package, the inductors employ a metal‑alloy powder core that dampens eddy currents while a fully metal‑shield contains magnetic flux. This combination delivers inductance values from 0.24 µH to 4.70 µH, saturation currents up to 5.5 A, and DC resistance as low as 36 mΩ, all across a –40 °C to +125 °C operating range. The result is a noticeable drop in emissions to neighboring circuitry and reduced trace‑to‑trace coupling, easing EMC testing and allowing tighter layout strategies.

The market impact is immediate for designers of high‑density power modules. With the SRP2008DP, a compact DC‑DC converter can meet demanding current specs without sacrificing board real‑estate or incurring costly redesigns for compliance. Industries ranging from consumer electronics to automotive telematics stand to benefit, as the inductors support both high‑efficiency operation and rugged environmental tolerances. Early adopters can request samples to validate performance, positioning the series as a practical solution for the next wave of miniaturized, high‑power applications.