Miniscule choke coils for 'small' products

1 November 2006 Circuit & System Protection

Small products will benefit from Murata’s 0504 size common mode choke coils. Developed especially for use in really small devices, the DLM11G series suppresses both common and differential mode noise.

Typical uses are in mobile phone audio lines like microphones, speakers and headphones and will include personal mobile equipment like PDAs, digital still cameras and MD players.

At 100 MHz, common mode impedance is of the order of 600 Ω and differential mode is about 1200 Ω. Rated current is 100 mA and rated voltage 5 V d.c. with a withstanding voltage of 25 V d.c. Minimum insulation resistance is 100 MΩ and DC resistance 0,8 Ω. The operating temperature range is -40 to 85 degree C.

The DLM11G is non-polarised. Both flow and reflow soldering are acceptable but Murata recommends reflow for optimal positional accuracy.

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