Chip beads with lowest DC resistance for their impedance

Chip beads with lowest DC resistance for their impedance

New Products |
By Nick Flaherty

The two new types of chip bead in the MMZ0402EUC family have impedance values of 150 Ω and 180 Ω at 100 MHz, with DC resistance values of 0.62 Ω and 0.69 Ω respectively. This results in a significant reduction in power losses, while at the same time providing higher noise suppression compared to the existing MMZ chip beads.

The compact IEC 0402 components measure 0.4 mm x 0.2 mm x 0.2 mm feature an impedance that is up to 20 percent higher than the MMZ parts with the same DC resistance rating. Combined with their higher rated currents of 350 mA and 300 mA, the MMZ0402EUC chip beads are ideally suited for noise suppression in the power and signal circuits of smartphones, tablets and other mobile devices. Mass production started this month.

The improved ratio of impedance to DC resistance was achieved with new materails that also allow for a wide range of temperatures from -55 °C to +125 °C. TDK will continue to expand the available range of impedance values in the compact lineup to meet the requirements for a broad range of mobile device designs.


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