1N4727A-1N4764A

      1N4727A-1N4764A(SILICON PLANAR POWER ZENER DIODES) were used in stabilizing and clipping circuits with high power rating.  Some property of 1N4727A-1N4764A were known, which is made of glass case DO-41.
      Maximun parameters of 1N4727A-1N4764A are getten at TA=25°C. TJ(Junction temperature)=200°C and Ts(Storage Temperature range)= -65 to +200 , Rtot(Power Dissipation)=1W(Valid provided that leads at a distance of 8 mm from case are kept at ambient temperature.), VF(Forward Voltage at IF=200 mA)=1.2V, RthA(Thermal Resistance Junction to Ambient Air=1.0W/6.67mW/°C.)=170K/W(Valid provided that leads at a distance of 8 mm from case are kept at ambient temperature.).
      Some parameters about Zener 1N4727A-1N4764A Voltage Range(Measured under thermal equilibrium and DC test conditions and Tested with pulses tp = 20 ms), Maximum Zener Impedance(The Zener Impedance is derived from the 60 Hz AC voltage which results when an AC current having an RMS value equal to 10% of the Zener Current (IZT or IZK) is superimposed on IZT or IZK. Zener Impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units), Maximum Reverse Leakage Current, Maximum Surge Current(The rating listed in the electrical characteristics table is maximum peak, non-repetitive, reverse surge current of 1/2 square wave or equivalent sine wave pulse of 1/120 second duration superimposed on the test current IZT), and Maximum Regulator Current(Valid provided that leads at a distance of 8 mm from case are kept at ambient temperature) were tested.