Murata introduces 0201 inch audio line noise filter for smart phones


Murata Manufacturing Co., Ltd.
Chairman of the Board and President:
Tsuneo Murata


Murata Manufacturing Co., Ltd. has introduced the NFZ03SG_SN series of audio line noise filters at a size of 0201 inch size (0.6×0.3mm), which is the smallest size in the industry. Mass production of these products began in January 2018.

In recent years, high sound quality has been emphasized as one of the selling points of smart phones and portable audio devices, and audio quality level has been a significant feature by which consumers choose devices. In order to counteract noise, the audio circuits used in these devices must include a noise suppression filter. However, noise suppression filters produce audio distortion, and thus cause a loss in sound quality.
NFZ03SG_SN series make use of our proprietary material technology to suppress audio distortion that occurs when audio circuits are used, in order to efficiently eliminate noise while maintaining high sound quality.



  • 330 to 1600 ohm at 900 MHz
  • Designed to have an impedance peak at communication frequencies
  • 0.6 x 0.3 mm size

・Impedance characteristics

・Audio distortion characteristics (THD+N)

Site URL for the product

Audio line noise filter
NFZ03SG_SN series
See the series lineup here.

See examples of noise suppression using audio line noise filters here.

Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at