Noise suppression chip ferrite beads

Noise suppression chip ferrite beads

June 10, 2020


Westborough, Massachusetts – Murata Manufacturing Co. Ltd. has introduced the BLM18SP_SH1 series of chip ferrite beads (for noise suppression) for use in automotive power supply applications. The company has started shipping samples, and volume production is scheduled to begin in June 2020.

Impedance values are 30Ω to 1kΩ and rated current values of 6A to 1.2A.

In recent years, in keeping with the progress of automobile electrification, cars have been equipped with an increasing number of electronic components such as cameras, radar, LiDAR, and electronic control units (ECUs) in order to support advanced driver assistance systems (ADAS) and autonomous driving. To ensure that the numerous in-vehicle components function properly and that a high degree of safety is maintained, it is essential to employ countermeasures against noise in power supply circuits and to ensure a stable power supply to each component.

As the number of in-vehicle components increases, needs are growing for improved noise suppression capabilities as well as for miniaturization.

With a new structural design that utilizes internal electrode fabrication technology, the new series realizes improved impedance acquisition efficiency along with lower resistance, which leads to a large current. This series has a 50% smaller base area compared to conventional. 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.

In addition to 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. Going forward, we will continue to develop products which meet the needs of the market and contribute to enhancing automotive performance and functionality.


  • 50% smaller base area compared to the conventional BLM21PG series
  • AEC-Q200 compliant
  • 2x rated current, 3x impedance of BLM18PG221SH1
  • Up to 6A rated current or 1kΩ impedance