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Strengthened Inductive Circuits: Combination of Improved Common-Mode Inductors and Half-Protected Inductors

Low-profile inductors designed by Bourns exhibit high resistance across a broad frequency spectrum. These inductors also boast a robust, semi-shielded design that delivers automotive-grade performance at an affordable cost.

, and Administrator

2025 August 27 . 11:44 AM

2 min read

Boosted Common-Mode Inductors combined with Half-Shielded Inductors: Amplified Performance and... — Boosted Common-Mode Inductors combined with Half-Shielded Inductors: Amplified Performance and Partially Protected Inductors

Strengthened Inductive Circuits: Combination of Improved Common-Mode Inductors and Half-Protected Inductors

New Series of Common-Mode Chip Inductors from Bourns Inc. Offer Compact Size, High Impedance, and Cost-Effectiveness

Bourns Inc., a leading manufacturer of electronic components, has expanded its SRN-BTA family with the addition of five new product series: SRN2010, SRN2510, SRN3010, SRN3015, and SRN4018BTA. The SRF1209U4 series, one of the new offerings, stands out for its compact size, low profile, and high impedance over a high-frequency range.

These surface-mount devices are designed for circuit protection against electromagnetic interference (EMI) by attenuating common-mode noise signals. They are ideal for applications requiring noise reduction in high-frequency circuits, such as data lines and signal interfaces, power supplies, and communication equipment.

Key features of the SRF1209U4 series include: - A compact chip size suitable for space-constrained designs - A low profile suitable for modern thin circuit boards - High impedance at high frequencies for effective common-mode noise suppression - Surface-mount technology for automated assembly processes

While specific numeric specifications such as inductance values, current ratings, or physical dimensions are not detailed in the available results, the series is noted to be suitable for typical EMI filtering roles in various electronic devices and beyond.

The new additions to the SRN-BTA family offer several advantages over their predecessors, including higher maximum inductor values, lower magnetic-field radiation, and enhanced product reliability with bottom-soldered lead-wires. These new series are designed for applications in automotive systems, DC-DC converters, and power supplies across consumer, industrial, and telecom electronics.

The inductors in these series are compatible with USB 3.1 Gen 1/2, HDMI 2.0/2.1, USB 4.0, and Thunderbolt interfaces. They also have a wide operating temperature range of -40 to +125°C. The direct current resistance (DCR) of the inductors is 0.3 Ω, and the impedance is up to 90 Ω. The current ratings of the inductors are up to 400 mA.

For precise parameters like inductance range, DC resistance, current rating, and dimensions, it is recommended to consult Bourns’ official datasheet or their authorized distributor catalogs. The products are available on major electronics distributors like DigiKey and Mouser, indicating their readiness for use in production environments compliant with surface-mount manufacturing techniques.

[1] DigiKey - SRN2010: https://www.digikey.com/products/en/passive-components/inductors/686?FV=ffd%2C1%2C0%2C0%2C1%2C0%2C0%2C1%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C1%2C0%2C0%2C0%2C0%2C0%2C1%2C0%2C0%2C1%2C0%2C0%2C1%2C0%2C0%2C1%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0%2C0