DC noise suppression block filters

14 July 2004 Circuit & System Protection

Noise suppression in high current DC lines is said to be easier with Murata's latest 15 A low DC resistance block filter. This filter is designed specifically for the suppression of noise in large screen displays. It uses Murata's advanced discrete components to achieve high levels of filtering in a relatively small component sized 12 x 11 and 8 mm high.

Insertion loss between 1 MHz and 1 GHz is a minimum of 40 dB at 20 to 25°C with a line impedance of 50 Ω. DC resistance is typically 0,8 mΩ, rated voltage is 50 V d.c., withstanding voltage is 125 V d.c. and minimum insulation resistance is 500 MΩ. The operating temperature range is -40 to 125°C with current derating necessary at 85°C and above.

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