The BLM Series of chip ferrite beads from MuRata Manufacturing has been crafted to function nearly as a resistor at noise frequencies–a characteristic that greatly reduces the possibility of resonance and leaves signal waveforms undistorted. This series is effective in circuits without stable ground lines because it does not need a connection to ground. The nickel barrier structure of the external electrodes provides excellent solder heat resistance. These beads generate impedance from relatively low frequencies. Consequently, they provide effective noise suppression in a wide frequency range–30 MHz to several hundred MHz. Learn more about these beads and other options for filtering in automotive applications in MuRata’s online catalog.