QU57

      The QU57 is one of the QU series. If you want to use it you must learn about it rightly. Here you can know some description about it. The first description is its size. You must notice that the maximal size is that the length by width is 6.1 by 6.1mm, and the maximal height is 8.2 mm. The second description is its maximal option frequency, which is 15 MHz mas.The third description is indutance which is 0.1-25H Max.At last in addition to the reference versions of parameters shown here, custom designs are available to meet your exact requirements.
      Every pin has its own features. And the QU57 has four features. Let me show them to you. The first feature is that it is a variable shielded type. This feature is very important, because the feature makes it used widely. You also should know the second feature, which is internally assembled condenser is available for the QU57. The third feature may make you know how good the QU57 is. The QU57 is ideally used as quadrature detector coil. Here is the last feature, which is the QU57 is RoHS compliance. 
      There is some notes about  QU57 you should also know. The first is that dimension does not include solder used on coil. And the second is pin pitch should be measured at the root of terminal. The next note is that dimensions without tolerance are approx. when you use it, you should know that the using frequency is 10.7MHz±1%, and the capacity is 100pF±10%, The next is the unloaded Qu which is 20 Min, and you should know this figure is on the condition of 10.7 MHz. The inductance is 21H±10%, this feature is on the condition of 2.5MHz.