comment on this article

Surface mount ferrite beads improve noise suppression in automotive applications

Murata has announced the BLM18SP_SH1 series of surface mount ‘chip’ ferrite beads constructed in a 1608 (1.6 mm x 0.8 mm) package designed specifically for automotive applications.

With the amount of electronics-based automotive systems continuing to increase, so does the need to reduce the potential for electromagnetic interference to impact safe operation. Many new automotive applications use a variety of complex and sophisticated electronic components and modules that are extremely sensitive to stray electromagnetic interference. Ferrite beads are an essential component to lower conducted and radiated electromagnetic emissions from power lines.

The BLM18SP_SH1 ferrite beads incorporate a new internal electrode fabrication approach that improves the impedance characteristics while lowering the DC series resistance. Compliant with the AEC-Q200 automotive stress resistance tests for passive components, the BLM18SP_SH1 series comprises a range of five components with impedance values from 30 Ω to 1 kΩ, and rated current from 1.2 to 6 A. Impedance is specified at 100 MHz, and rated current at 85°C. These components support an -55°C to +125°C operational temperature range with derating.

Compared to the current Murata BML21PG series ferrite beads that are constructed in a 2012 (2.0 mm x 1.25 mm) package, the BLM18SP_SH1 series is 50% smaller. Board space is at a premium for all applications, so by reducing the size of the EMI noise suppression components, more space is available for the end-application.

Neil Tyler

Comment on this article

This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Resilient timing

Microchip has integrated its BlueSky GNSS Firewall with its TimePictra 11 ...

Living with lithium

Batteries play a key role in a range of applications and are used in medical ...

Custom MMIC design

Plextek RFI CEO Liam Devlin discusses the technical and commercial ...

Ethical Concerns

Kyle Dent talks New Electronics through some of the ethical issues that have to ...