1W SILICON PLANAR ZENER DIODES 1N4728A/B THRU 1N4764A/B Features * Silicon planar power zener diodes * For use in stabilizing and clipping circuits with high power DO-41(GLASS) rating. * Standards Zener voltage tolerance is 10% Add suffix "A" for 5% tolerance other tolerance available 0.102(2.6) MAX. DIA. upon request 1.102(28.0) MIN. 0.161(4.1) MAX. Mechanical Data * Case : DO-41 glass case * Weight : Approx. 0.35 gram 1.102(28.0) MIN. 0.034(0.86) MAX. DIA. Dimensions in inches and (millimeters) Absolute Maximum Ratings (Limiting Values) (TA=25) Symbols IZ Zener current see table "Characteristics" Power dissipation at TA=25 Junction Temperature Pd / Vz Units mA Ptot 11) W TJ 175 TSTG Storage Temperature range Value -55 to+175 1) Valid provided that a distance of 8mm from case are kept at ambient temperature Electrical Characteristics (TA=25) Symbols Thermal resistance junction to ambient Forward voltage at IF=200mA Min. Max. Units RJA 1751) /W VF 1.2 V 1) Valid provided that a distance of 8mm from case are kept at ambient temperature Typ. 1N4728...1N4764 SILICON PLANAR ZENER DIODES Type Nominal Zener Voltage3) at IzT Test Current IZT mA Vz V Maximum zener impedance1) at IzT ZZT ZZK at IZK Maximum Reverse Leakage Current IR A mA at VR Surge Current at TA=0.25 Maximum Regulator Current2) IZM V IR mA 1.0 1380 276 1.0 1.0 1260 1190 252 234 1.0 1070 217 1.0 970 193 mA 1N4728 3.3 76 10 1N4729 1N4730 3.6 3.9 69 64 10 9 1N4731 4.3 58 9 1N4732 4.7 53 8 500 1N4733 5.1 49 7 550 1.0 890 178 1N4734 5.6 45 5 600 2.0 810 162 1N4735 6.2 41 2 3.0 730 146 1N4736 6.8 37 3.5 4.0 660 133 1N4737 1N4738 7.5 8.2 34 31 4.0 4.5 5.0 6.0 605 550 121 110 1N4739 9.1 28 5.0 7.0 500 100 1N4740 10 25 7 7.6 454 91 1N4741 11 23 8 8.4 414 83 1N4742 12 21 9 9.1 380 76 1N4743 13 19 10 9.9 344 69 1N4744 15 17 14 11.4 304 61 1N4745 1N4746 16 18 15.5 14 16 20 12.2 13.7 285 250 57 50 1N4747 20 12.5 22 15.2 225 45 1N4748 22 11.5 23 16.7 205 41 1N4749 24 10.5 25 18.2 190 38 1N4750 27 9.5 35 20.6 170 34 1N4751 30 8.5 40 22.8 150 30 1N4752 33 7.5 45 25.1 135 27 1N4753 36 7.0 50 27.4 125 25 1N4754 39 6.5 60 29.7 115 23 1N4755 43 6.0 70 32.7 110 22 1N4756 47 5.5 80 35.8 95 19 1N4757 51 5.0 95 38.8 90 18 1N4758 1N4759 56 62 4.5 4.0 110 125 42.6 47.1 80 70 16 14 1N4760 68 3.7 150 51.7 65 13 1N4761 75 3.3 175 56.0 60 12 1N4762 1N4763 82 91 3.0 2.8 200 250 62.2 69.2 55 50 11 10 1N4764 100 2.5 350 76.0 45 9 Notes: 100 400 50 1.0 10 0.5 700 750 0.25 1000 1500 2000 3000 5 1) The zener impedance is derived from the 1kHz AC voltage which results when on 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) Vaild provided that electrodes at a distance of 10mm from case are kept at ambient temperature. 3) Measured under thermal equilibrium and DC test conditions. RATINGS AND CHARACTERISTIC CURVES 1N4728A/B THRU 1N4764A/B Admissible power dissipation versus ambient temperature (Valid provided that leads at a distance of 10mm from case are kept at ambient temperature) 1N4728A/B...1N4764A/B W 1.0 Ptot 0.8 0.6 0.4 0.2 0 0 200 100 Tamb