NOT RECOMMENDED FOR NEW DESIGN, USE DFLZxx 1N4728A - 1N4761A 1.0W ZENER DIODE Features 1.0 Watt Power Dissipation 3.3V - 75V Nominal Zener Voltage Standard V Tolerance is 5% Z Lead Free Finish, RoHS Compliant (Note 2) Mechanical Data Case: DO-41 DO-41 Glass Case Material: Glass. UL Flammability Classification Rating 94V-0 Dim Min Max Terminals: Finish Sn96.5Ag3.5. Solderable A 26.0 per MIL-STD-202, Method 208 B 4.10 Polarity: Cathode Band Marking: Type Number C 0.86 Weight: 0.35 grams (approximate) D 2.60 All Dimensions in mm Maximum Ratings T = 25C unless otherwise specified A Characteristic Symbol Value Unit Zener Current (see Table page 2) I Pd / V mA Z Z Power Dissipation 1.0 W P d Derate Above 50C (Note 1) 6.67 mW/C Thermal Resistance - Junction to Ambient Air 175 C/W R JA Forward Voltage I = 200 mA V 1.2 V F F Operating and Storage Temperature Range -65 to + 175 C T , T j STG Notes: 1. Valid provided that leads are kept at TL 50C with lead length = 9.5mm (3/8) from case. 2. EC Directive 2002/95/EC (RHS) revision 13.2.2003. Glass and high temperature solder exemptions applied where applicable, see EU Directive Annex Notes 5 and 7. 1N4728A - 1N4761A DS18007 Rev. 19 - 3 1 of 3 Diodes Incorporated www.diodes.com Electrical Characteristics T = 25C unless otherwise specified A Max Surge Nominal Zener Test Maximum Zener Impedance Maximum Reverse Temperature Current Voltage (Note 3) Current (Note 4) Leakage Current Coefficient 8.3ms Type I ZT Number V I I Z I Z I I I V I Z ZT ZT ZT ZT ZK ZK ZK R R ZS (V) (mA) () () (mA) (A) (V) (mA) %/C 1N4728A 3.3 76 10 400 1.0 100 1.0 1380 -0.08 to -0.05 1N4729A 3.6 69 10 400 1.0 100 1.0 1260 -0.08 to -0.05 1N4730A 3.9 64 9.0 400 1.0 50 1.0 1190 -0.07 to -0.02 1N4731A 4.3 58 9.0 400 1.0 10 1.0 1070 -0.07 to -0.01 1N4732A 4.7 53 8.0 500 1.0 10 1.0 970 -0.03 to +0.04 1N4733A 5.1 49 7.0 550 1.0 10 1.0 890 -0.01 to +0.04 1N4734A 5.6 45 5.0 600 1.0 10 2.0 810 0 to +0.045 1N4735A 6.2 41 2.0 700 1.0 10 3.0 730 +0.01 to +0.055 1N4736A 6.8 37 3.5 700 1.0 10 4.0 660 +0.015 to +0.06 1N4737A 7.5 34 4.0 700 0.5 10 5.0 605 +0.02 to +0.065 1N4738A 8.2 31 4.5 700 0.5 10 6.0 550 0.03 to 0.07 1N4739A 9.1 28 5.0 700 0.5 10 7.0 500 0.035 to 0.075 1N4740A 10 25 7.0 700 0.25 10 7.6 454 0.04 to 0.08 1N4741A 11 23 8.0 700 0.25 5.0 8.4 414 0.045 to 0.08 1N4742A 12 21 9.0 700 0.25 5.0 9.1 380 0.045 to 0.085 1N4743A 13 19 10 700 0.25 5.0 9.9 344 0.05 to 0.085 1N4744A 15 17 14 700 0.25 5.0 11.4 304 0.055 to 0.09 1N4745A 16 15.5 16 700 0.25 5.0 12.2 285 0.055 to 0.09 1N4746A 18 14 20 750 0.25 5.0 13.7 250 0.06 to 0.09 1N4747A 20 12.5 22 750 0.25 5.0 15.2 225 0.06 to 0.09 1N4748A 22 11.5 23 750 0.25 5.0 16.7 205 0.06 to 0.095 1N4749A 24 10.5 25 750 0.25 5.0 18.2 190 0.06 to 0.095 1N4750A 27 9.5 35 750 0.25 5.0 20.6 170 0.06 to 0.095 1N4751A 30 8.5 40 1000 0.25 5.0 22.8 150 0.06 to 0.095 1N4752A 33 7.5 45 1000 0.25 5.0 25.1 135 0.06 to 0.095 1N4753A 36 7.0 50 1000 0.25 5.0 27.4 125 0.06 to 0.095 1N4754A 39 6.5 60 1000 0.25 5.0 29.7 115 0.06 to 0.095 1N4755A 43 6.0 70 1500 0.25 5.0 32.7 110 0.06 to 0.095 1N4756A 47 5.5 80 1500 0.25 5.0 35.8 95 0.06 to 0.095 1N4757A 51 5.0 95 1500 0.25 5.0 38.8 90 0.06 to 0.095 1N4758A 56 4.5 110 2000 0.25 5.0 42.6 80 0.06 to 0.095 1N4759A 62 4.0 125 2000 0.25 5.0 47.1 70 0.06 to 0.095 1N4760A 68 3.7 150 2000 0.25 5.0 51.7 65 0.06 to 0.095 1N4761A 75 3.3 175 2000 0.25 5.0 56.0 60 0.06 to 0.095 Notes: 3. Measured under thermal equilibrium and dc (I ) test conditions. ZT 4. 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 (I or I ) is superimposed on I or I . Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to ZT ZK ZT ZK eliminate unstable units. 1N4728A - 1N4761A DS18007 Rev. 19 - 3 2 of 3 Diodes Incorporated www.diodes.com