Small Ferrite Chips for Automotive Power Supply Applications

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  • To meet the growing demands of efficient power supply for automobile electronics, Murata introduces small chip ferrite beads for noise suppression
  • These also provide manufacturers with more flexibility when designing automotive power supply circuits and supports autonomous driving

In recent years, cars have been equipped with an increasing number of electronic components such as cameras, radar, LiDAR and ECUs in order to support ADAS and autonomous driving. To ensure that the increasing number of in-vehicle components function properly and that a high degree of safety is maintained, it is essential to employ improved noise suppression capabilities in power supply circuits and ensure stable power supply to each component.

Therefore, Murata has introduced the BLM18SP_SH1 series of small chip ferrite beads (for noise suppression) for use in automotive power supply applications.

With a structural design that utilizes internal electrode fabrication technology, the new series brings improved impedance acquisition efficiency along with lower resistance, which leads to a large current.

In addition, commercialized in 0603(1608) inch (mm) size (1.6mm × 0.8mm) package, this series has a 50 per cent smaller base area compared to conventional products which are typically packaged in 0805(2012) inch (mm) size (2.0mm × 1.25mm). This provides manufacturers with more flexibility when designing automotive power supply circuits and helps to support more sophisticated autonomous driving with smaller in-vehicle components.

Along with this series for automotive power supply applications, Murata has two other series in 0603 inch size—the BLM18SP_SZ1 series for in-vehicle infotainment and the BLM18SP_SN1 series for consumer devices.

Key features

  • Achieves approx. 50 per cent smaller base area compared to the conventional BLM21PG series
  • Complies with AEC-Q200
  • Supports up to 6A rated current or 1kΩ impedance (in the BLM18SP_SH1 series)

The company has started shipping samples, and volume production is scheduled to begin in June 2020.


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