1N4728A THRU 1N4764A 1W EPITAXIAL ZENER DIODE FEATURES DO-41(GLASS) 4.5 ± 0.2 Φ 2.5 ± 0.2 MECHANICAL DATA 25.4 ± 1 Φ 0.8± 0.1 • Low profile package • Built-in strain relief • Low inductance • High temperature soldering : 260°C /10 seconds at terminals • Glass package has Underwriters Laboratory Flammability Classification • In compliance with EU RoHS 2002/95/EC directives 25.4 ± 1 • Case: Molded Glass DO-41G • Terminals: Axial leads, solderable per MIL-STD-750, Method 2026 guaranteed • Polarity: Color band denotes positive end • Mounting position:Any • Weight: 0.012 ounce, 0.336 gram All Dimensions in mm ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES)(TA=25℃) Symbols Value Units Zener current see table "Characteristics" Power dissipation at TA=50℃ Junction temperature Storage temperature range 1 Ptot W 1) TJ 175 TSTG -65 to +175 ℃ ℃ 1)Valid provided that a distance of 8mm from case are kept at ambient temperature ELECTRCAL CHARACTERISTICS(TA=25℃) Symbols Thermal resistance junction to ambient Forward voltage at IF=200mA Min RthA VF 1) Valid provided that a distance at 8mm from case are kept at ambient temperature Typ Max 170 1.2 1) Units ℃/W V 1N4728A THRU 1N4764A 1W EPITAXIAL ZENER DIODE Type Nominal Test Zener Current Voltage Maximum Zener Impedance 1) Maximum reverse leakage current Surge at IZT VZ V IZT IZT mA ZZT 1N4728 3.3 76 10 1N4729 3.6 69 10 1N4730 3.9 64 9 1N4731 4.3 58 9 at TA=0.25 at ZZK at VR IZK mA IR A 100 400 regulator Current 3) at Maximum current 50 1.0 IR IZM V mA mA 1.0 1380 276 1.0 1260 252 1.0 1190 234 1.0 1070 217 1N4732 4.7 53 8 500 1.0 970 193 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 1N4736 6.8 37 3.5 1N4737 7.5 34 4.0 1N4738 8.2 31 4.5 1N4739 9.1 28 5.0 1N4740 10 25 7 1N4741 11 23 8 10 5.0 700 3.0 730 146 4.0 660 133 5.0 605 121 6.0 550 110 7.0 500 100 7.6 454 91 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 16 15.5 16 12.2 285 57 1N4746 18 14 20 13.7 250 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 56 4.5 110 42.6 80 16 1N4759 62 4.0 125 47.1 70 14 1N4760 68 3.7 150 51.7 65 13 1N4761 75 3.3 175 56.0 60 12 1N4762 82 3.0 200 62.2 55 11 69.2 50 10 76.0 45 9 1N4763 91 2.8 250 1N4764 100 2.5 350 750 1000 1500 2000 3000 0.25 5 Notes:1) The Zener impedance is derived from the 1KHz AC voltage which results when an AC current having an RMS calue 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 10mm from case are kept at ambient temperature 3) Measured under thermal equilibriun and DC test conditions. 2) 1N4728A THRU 1N4764A RATINGS AND CHARACTERISTIC CURVES FIG.1 -- BREAKDOWN CHARACTERISTICS 100 IZ mA 5 15 10 20 25 30 V 80 60 40 20 1N4750 1N4749 1N4748 1N4747 1N4744 1N4741 1N4742 1N4739 1N4735 1N4732 1N4733 1N4731 1N4728 0 VZ FIG.2 -- ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE W 1.0 0.8 Ptot 0.6 0.4 0.2 0 0 100 200℃ Tamb