Tiny high-current beads
24 April 2002
Circuit & System Protection
Murata's 0603 sized ferrite beads can suppress noise on power supply lines in high performance digital equipment. As the number of peripherals that can be connected together by systems like USB increases, so does the current required to drive them; and it still needs to be clean. Moreover, as equipment gets smaller, the component mounting area shrinks, connector pitch becomes narrower and the space between ICs decreases. Consequently, the demand for smaller suppression components continues to grow.
Murata has introduced a high current version ferrite bead. Due to optimised electrode thickness using monolithic technologies, it has an improved internal coil structure, low DC resistance and can withstand currents between 1,5 and 3,0 A. Impedance values of 33, 120 and 180 Ohm at 100 MHz have a ±25% tolerance, maximum DC resistance values of 25, 50 and 90 Ohm respectively, and operate over a temperature range of -55 to 125°C.
The BLM18P is under 1,0 mm high and the external electrodes contain no lead.
Avnet Kopp
011 444 2333
[email protected]
www.avnet.co.za
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