UZ706 series

      The UZ706 series has 2 features,one is 10 times greater surge rating than conventional 1 Watt Types ;the other is small physical size.
      The absolute maximum rating of the UZ706 series are zener voltage is 6.8 to 400V;the storge andoperating temperature is -65 to +175  ect.
      While high power zener diodes are made, they are usually not readily available. They also tend to be rather expensive, and are often stud-mounted types. These are not always easy to install on a heatsink, and the mounting hardware (insulating bush and washer) seems to be all but unobtainable.
      Provided you (or your application) can tolerate a slightly higher voltage than may have been specified, a high power zener can be made using an additional transistor and a resistor.
      Construction of UZ706 series is not critical, but a heatsink will almost certainly be needed for Q1. Using a clip to attach D1 to the heatsink will allow a higher dissipation, and will allow you to operate the zener at its maximum operating current. Select Q1 to suit the application - in many cases, a raid on the junk box will almost certainly provide something usable. R1 can be 0.25 or 0.5W.
      The products shown herein of UZ706 series are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.    
      At present there is not too much information about this model.If you are willing to find more  about UZ706 series, please pay attention to our web! We will promptly update the relevant  information.