1N4728 thru 1N4756 VZ Range: 3.3 to 47 Volts Zener Diodes Power Dissipation: 1.0W Features Silicon Planar Power Zener Diodes. For use in stabilizing and clipping circuits with high power rating. Standard Zener voltage tolerance is 10%. Add suffix "A" for 5% tolerance. Other Zener voltages and tolerances are available upon request. These diodes are also available in the MELF case with type designation ZM4728 thru ZM4764 For bidirectional product, contact local Technical Sales office. Mechanical Data Case: DO-41 Glass or DO-41 Plastic Case Weight: approx. 0.35g Note: Suffix: "-P" to order Molded Plastic Package Suffix: "-G" to order Molded Glass Package Maximum Ratings and Thermal Characteristics (Ratings at 25oC ambient temperature unless otherwise specified.) Parameter Symbol Zener current Value Unit See Next Page o Power dissipation at Tamb=50 C Ptot 1.0 (1) Thermal resistance junction to ambient air RJA 170 (1) W o C/W Junction temperature Tj 175 o C Storage temperature range TS -65 to +175 o C Notes: 1. Valid provided that electrodes at a distance of 10mm from case are kept at ambient temperature. 543 Electrical Characteristics (TA=25oC unless otherwise noted) Maximum VF=1.2V at IF=200mA Test current Maximum reverse leakage current Surge current Maximum regulator current (2) at TA=50oC IZM (mA) Type number Nominal zener voltage (3) at IZT VZ (Volts) 1N4728 3.3 76 10 400 1.0 100 1 1380 276 1N4729 3.6 69 10 400 1.0 100 1 1260 252 IZT (mA) Maximum zener impedance ZZT at IZT ( ) ZZK ( ) (1) at IZK (mA) IR (uA) at VR (Volts) at TA=25oC IR (mA) 1N4730 3.9 64 9 400 1.0 50 1 1190 234 1N4731 4.3 58 9 400 1.0 10 1 1070 217 193 1N4732 4.7 53 8 500 1.0 10 1 970 1N4733 5.1 49 7 550 1.0 10 1 890 178 1N4734 5.6 45 5 600 1.0 10 2 810 162 1N4735 6.2 41 2 700 1.0 10 3 730 146 1N4736 6.8 37 3.5 700 1.0 10 4 660 133 1N4737 7.5 34 4.0 700 0.5 10 5 605 121 1N4738 8.2 31 4.5 700 0.5 10 6 550 110 100 1N4739 9.1 28 5.0 700 0.5 10 7 500 1N4740 10 25 7 700 0.25 10 7.6 454 91 1N4741 11 23 8 700 0.25 5 8.4 414 83 1N4742 12 21 9 700 0.25 5 9.1 380 76 1N4743 13 19 10 700 0.25 5 9.9 344 69 1N4744 15 17 14 700 0 0.25 5 11. 304 61 1N4745 16 15.5 16 700 0.25 5 12.2 285 57 1N4746 18 14 20 750 0.25 5 13.7 250 50 1N4747 20 12.5 22 750 0.25 5 15.2 225 45 1N4748 22 11.5 23 750 0.25 5 16.7 205 41 1N4749 24 10.5 25 750 0.25 5 18.2 190 38 1N4750 27 9.5 35 750 0 0.25 5 20. 170 34 1N4751 30 8.5 40 1000 0 0.25 5 22. 150 30 1N4752 33 7.5 45 1000 0.25 5 25.1 135 27 1N4753 36 7.0 50 1000 0.25 0 5 27. 125 25 1N4754 39 6.5 60 1000 0 0.25 5 29. 115 23 1N4755 43 6.0 70 1500 0 0.25 5 32. 110 22 1N4756 47 5.5 80 1500 0.25 0 5 35. 95 19 Notes: 1. The Zener impedance is derived from the 1KHZ 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 2. Valid provided that electrodes at a distance of 10 mm from case are kept at ambient temperature 3. Measured under thermal equilibrium and DC test conditions 544 RATINGS AND CHARACTERISTIC CURVES (TA = 25oC unless otherwise noted) 545