1N4728A Series 1 Watt DO-41 Hermetically Sealed Glass Zener Voltage Regulator Diodes This is a complete series of 1 Watt Zener diode with limits and excellent operating characteristics that reflect the superior capabilities of silicon-oxide passivated junctions. All this in an axial-lead hermetically sealed glass package that offers protection in all common environmental conditions. http://onsemi.com Specification Features: * * * * * * Zener Voltage Range - 3.3 V to 91 V ESD Rating of Class 3 (>16 KV) per Human Body Model DO-41 (DO-204AL) Package Double Slug Type Construction Metallurgical Bonded Construction Oxide Passivated Die AXIAL LEAD CASE 59-10 GLASS L 1N 47 xxA YWW Mechanical Characteristics: CASE: Double slug type, hermetically sealed glass FINISH: All external surfaces are corrosion resistant and leads are readily solderable L = Assembly Location 1N47xxA = Device Code Y = Year WW = Work Week MAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES: 230C, 1/16 from the case for 10 seconds POLARITY: Cathode indicated by polarity band MOUNTING POSITION: Any MAXIMUM RATINGS Rating Max. Steady State Power Dissipation @ TL 50C, Lead Length = 3/8 Derated above 50C Operating and Storage Temperature Range Symbol Value Unit PD 1.0 Watt 6.67 mW/C - 65 to +200 C TJ, Tstg Cathode Anode ORDERING INFORMATION (Note 1.) Device Package Shipping 1N47xxA Axial Lead 2000 Units/Box 1N47xxARL Axial Lead 6000/Tape & Reel 1N47xxARL2 Axial Lead 6000/Tape & Reel 1N47xxATA Axial Lead 4000/Ammo Pack 1N47xxATA2 Axial Lead 4000/Ammo Pack 1. The "2" suffix refers to 26 mm tape spacing. Devices listed in bold, italic are ON Semiconductor Preferred devices. Preferred devices are recommended choices for future use and best overall value. Semiconductor Components Industries, LLC, 2002 January, 2002 - Rev. 2 1 Publication Order Number: 1N4728A/D 1N4728A Series ELECTRICAL CHARACTERISTICS (TA = 25C unless I otherwise noted, VF = 1.2 V Max., IF = 200 mA for all types) Symbol VZ Reverse Zener Voltage @ IZT IZT Reverse Current ZZT Maximum Zener Impedance @ IZT IZK Reverse Current ZZK Maximum Zener Impedance @ IZK IR Reverse Leakage Current @ VR VR Breakdown Voltage IF Forward Current VF Forward Voltage @ IF Ir IF Parameter VZ VR V IR VF IZT Zener Voltage Regulator Surge Current @ TA = 25C ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted, VF = 1.2 V Max, IF = 200 mA for all types) Zener Voltage (3.)(4.) VZ (Volts) Zener Impedance (5.) Leakage Current ZZT @ IZT Max (mA) () () (mA) (A Max) (Volts) (mA) 3.3 3.6 3.9 4.3 4.7 3.47 3.78 4.10 4.52 4.94 76 69 64 58 53 10 10 9 9 8 400 400 400 400 500 1 1 1 1 1 100 100 50 10 10 1 1 1 1 1 1380 1260 1190 1070 970 4.85 5.32 5.89 6.46 7.13 5.1 5.6 6.2 6.8 7.5 5.36 5.88 6.51 7.14 7.88 49 45 41 37 34 7 5 2 3.5 4 550 600 700 700 700 1 1 1 1 0.5 10 10 10 10 10 1 2 3 4 5 890 810 730 660 605 1N4738A 1N4739A 1N4740A 1N4741A 1N4742A 7.79 8.65 9.50 10.45 11.40 8.2 9.1 10 11 12 8.61 9.56 10.50 11.55 12.60 31 28 25 23 21 4.5 5 7 8 9 700 700 700 700 700 0.5 0.5 0.25 0.25 0.25 10 10 10 5 5 6 7 7.6 8.4 9.1 550 500 454 414 380 1N4743A 1N4744A 1N4745A 12.4 14.3 15.2 13 15 16 13.7 15.8 16.8 19 17 15.5 10 14 16 700 700 700 0.25 0.25 0.25 5 5 5 9.9 11.4 12.2 344 304 285 Min Nom 1N4728A 1N4729A 1N4730A 1N4731A 1N4732A 3.14 3.42 3.71 4.09 4.47 1N4733A 1N4734A 1N4735A 1N4736A 1N4737A ZZK @ IZK Ir (6.) @ IZT JEDEC Device (2.) IR @ VR TOLERANCE AND TYPE NUMBER DESIGNATION 2. The JEDEC type numbers listed have a standard tolerance on the nominal zener voltage of 5%. SPECIALS AVAILABLE INCLUDE: 3. Nominal zener voltages between the voltages shown and tighter voltage tolerances. For detailed information on price, availability, and delivery, contact your nearest ON Semiconductor representative. ZENER VOLTAGE (VZ) MEASUREMENT 4. ON Semiconductor guarantees the zener voltage when measured at 90 seconds while maintaining the lead temperature (TL) at 30C 1C, 3/8 from the diode body. ZENER IMPEDANCE (ZZ) DERIVATION 5. The zener impedance is derived from the 60 cycle ac voltage, which results when an ac current having an rms value equal to 10% of the dc zener current (IZT or IZK) is superimposed on IZT or IZK. SURGE CURRENT (IR) NON-REPETITIVE 6. 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, per JEDEC registration; however, actual device capability is as described in Figure 5 of the General Data - DO-41 Glass. http://onsemi.com 2 1N4728A Series ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted, VF = 1.2 V Max, IF = 200 mA for all types) (continued) Zener Voltage (8.)(9.) VZ (Volts) Zener Impedance (10.) Leakage Current ZZT @ IZT Max (mA) () () (mA) (A Max) (Volts) (mA) 18 20 18.9 21.0 14 12.5 20 22 750 750 0.25 0.25 5 5 13.7 15.2 250 225 20.9 22.8 25.7 28.5 31.4 22 24 27 30 33 23.1 25.2 28.4 31.5 34.7 11.5 10.5 9.5 8.5 7.5 23 25 35 40 45 750 750 750 1000 1000 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 16.7 18.2 20.6 22.8 25.1 205 190 170 150 135 1N4753A 1N4754A 1N4755A 1N4756A 1N4757A 34.2 37.1 40.9 44.7 48.5 36 39 43 47 51 37.8 41.0 45.2 49.4 53.6 7 6.5 6 5.5 5 50 60 70 80 95 1000 1000 1500 1500 1500 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 27.4 29.7 32.7 35.8 38.8 125 115 110 95 90 1N4758A 1N4759A 1N4760A 1N4761A 1N4762A 53.2 58.9 64.6 71.3 77.9 56 62 68 75 82 58.8 65.1 71.4 78.8 86.1 4.5 4 3.7 3.3 3 110 125 150 175 200 2000 2000 2000 2000 3000 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 42.6 47.1 51.7 56 62.2 80 70 65 60 55 1N4763A 86.5 91 95.6 2.8 250 3000 0.25 5 69.2 50 1N4764A 95 100 105 2.5 350 3000 0.25 5 76 45 Min Nom 1N4746A 1N4747A 17.1 19.0 1N4748A 1N4749A 1N4750A 1N4751A 1N4752A ZZK @ IZK Ir (11.) @ IZT JEDEC Device (7.) IR @ VR PD , MAXIMUM STEADY STATE POWER DISSIPATION (WATTS) TOLERANCE AND TYPE NUMBER DESIGNATION 7. The JEDEC type numbers listed have a standard tolerance on the nominal zener voltage of 5%. SPECIALS AVAILABLE INCLUDE: 8. Nominal zener voltages between the voltages shown and tighter voltage tolerances. For detailed information on price, availability, and delivery, contact your nearest ON Semiconductor representative. ZENER VOLTAGE (VZ) MEASUREMENT 9. ON Semiconductor guarantees the zener voltage when measured at 90 seconds while maintaining the lead temperature (TL) at 30C 1C, 3/8 from the diode body. ZENER IMPEDANCE (ZZ) DERIVATION 10. The zener impedance is derived from the 60 cycle ac voltage, which results when an ac current having an rms value equal to 10% of the dc zener current (IZT or IZK) is superimposed on IZT or IZK. SURGE CURRENT (IR) NON-REPETITIVE 11. 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, per JEDEC registration; however, actual device capability is as described in Figure 5 of the General Data - DO-41 Glass. 1.25 L = 1 L = 1/8 1 L = LEAD LENGTH TO HEAT SINK L = 3/8 0.75 0.5 0.25 0 20 40 60 80 100 120 140 TL, LEAD TEMPERATURE (C) 160 180 Figure 1. Power Temperature Derating Curve http://onsemi.com 3 200 1N4728A Series b. Range for Units to 12 to 100 Volts +12 VZ , TEMPERATURE COEFFICIENT (mV/C) VZ , TEMPERATURE COEFFICIENT (mV/C) a. Range for Units to 12 Volts +10 +8 +6 +4 +2 VZ@IZT RANGE 0 -2 -4 2 3 4 5 6 7 8 9 VZ, ZENER VOLTAGE (VOLTS) 10 11 100 70 50 12 30 20 RANGE 10 7 5 VZ@IZT 3 2 1 10 20 30 50 VZ, ZENER VOLTAGE (VOLTS) 70 100 Ppk , PEAK SURGE POWER (WATTS) 175 VZ , TEMPERATURE COEFFICIENT (mV/C) JL , JUNCTIONTOLEAD THERMAL RESISTANCE (mV/C/W) Figure 2. Temperature Coefficients (-55C to +150C temperature range; 90% of the units are in the ranges indicated.) 150 125 100 75 50 25 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.9 1 VZ@IZ TA=25C +4 +2 20mA 0 0.01mA 1mA NOTE: BELOW 3 VOLTS AND ABOVE 8 VOLTS NOTE: CHANGES IN ZENER CURRENT DO NOT NOTE: EFFECT TEMPERATURE COEFFICIENTS -2 -4 3 4 5 6 7 8 L, LEAD LENGTH TO HEAT SINK (INCHES) VZ, ZENER VOLTAGE (VOLTS) Figure 3. Typical Thermal Resistance versus Lead Length Figure 4. Effect of Zener Current 100 70 50 30 0.8 +6 RECTANGULAR WAVEFORM TJ=25C PRIOR TO INITIAL PULSE 11V-100V NONREPETITIVE 5% DUTY CYCLE 3.3V-10V NONREPETITIVE 20 10 7 5 3 2 1 0.01 10% DUTY CYCLE 20% DUTY CYCLE 0.02 0.05 0.1 0.2 0.5 This graph represents 90 percentile data points. For worst case design characteristics, multiply surge power by 2/3. 1 2 5 PW, PULSE WIDTH (ms) 10 Figure 5. Maximum Surge Power http://onsemi.com 4 20 50 100 200 500 1000 1N4728A Series VZ = 2.7 V 200 1000 700 500 TJ = 25C iZ(rms) = 0.1 IZ(dc) f = 60 Hz Z Z , DYNAMIC IMPEDANCE (OHMS) Z Z , DYNAMIC IMPEDANCE (OHMS) 1000 500 47 V 100 27 V 50 20 10 6.2 V 5 2 1 0.1 0.2 0.5 1 2 5 10 IZ, ZENER CURRENT (mA) 20 50 IZ = 1 mA 200 100 70 50 5 mA 20 20 mA 10 7 5 2 1 100 1 2 Figure 6. Effect of Zener Current on Zener Impedance 10000 7000 5000 5 7 10 20 30 VZ, ZENER VOLTAGE (V) 50 70 100 Figure 7. Effect of Zener Voltage on Zener Impedance 200 C, CAPACITANCE (pF) TYPICAL LEAKAGE CURRENT AT 80% OF NOMINAL BREAKDOWN VOLTAGE 1000 700 500 200 100 70 50 0 V BIAS 100 1 V BIAS 50 20 10 8 20 4 10 7 5 50% OF BREAKDOWN BIAS 1 2 5 10 20 VZ, NOMINAL VZ (VOLTS) 50 100 Figure 9. Typical Capacitance versus VZ 2 1 0.7 0.5 1000 500 +125C 0.2 I F , FORWARD CURRENT (mA) I R , LEAKAGE CURRENT ( A) 3 400 300 2000 0.1 0.07 0.05 0.02 0.01 0.007 0.005 +25C MINIMUM MAXIMUM 200 100 50 20 75C 10 25C 5 150C 0C 2 0.002 0.001 TJ = 25C iZ(rms) = 0.1 IZ(dc) f = 60 Hz 3 4 5 6 7 8 9 10 11 12 13 14 1 15 0.4 0.5 0.6 0.7 0.8 0.9 1 VZ, NOMINAL ZENER VOLTAGE (VOLTS) VF, FORWARD VOLTAGE (VOLTS) Figure 8. Typical Leakage Current Figure 10. Typical Forward Characteristics http://onsemi.com 5 1.1 1N4728A Series APPLICATION NOTE TJL is the increase in junction temperature above the lead temperature and may be found as follows: Since the actual voltage available from a given zener diode is temperature dependent, it is necessary to determine junction temperature under any set of operating conditions in order to calculate its value. The following procedure is recommended: Lead Temperature, TL, should be determined from: TJL = JLPD. JL may be determined from Figure 3 for dc power conditions. For worst-case design, using expected limits of IZ, limits of PD and the extremes of TJ(TJ) may be estimated. Changes in voltage, VZ, can then be found from: TL = LAPD + TA. LA is the lead-to-ambient thermal resistance (C/W) and PD is the power dissipation. The value for LA will vary and depends on the device mounting method. LA is generally 30 to 40C/W for the various clips and tie points in common use and for printed circuit board wiring. The temperature of the lead can also be measured using a thermocouple placed on the lead as close as possible to the tie point. The thermal mass connected to the tie point is normally large enough so that it will not significantly respond to heat surges generated in the diode as a result of pulsed operation once steady-state conditions are achieved. Using the measured value of TL, the junction temperature may be determined by: V = VZ TJ. VZ, the zener voltage temperature coefficient, is found from Figure 2. Under high power-pulse operation, the zener voltage will vary with time and may also be affected significantly by the zener resistance. For best regulation, keep current excursions as low as possible. Surge limitations are given in Figure 5. They are lower than would be expected by considering only junction temperature, as current crowding effects cause temperatures to be extremely high in small spots, resulting in device degradation should the limits of Figure 5 be exceeded. TJ = TL + TJL. http://onsemi.com 6 1N4728A Series OUTLINE DIMENSIONS Zener Voltage Regulator Diodes - Axial Leaded 1 Watt DO-41 Glass GLASS D0-41 CASE 59-10 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. 59-04 OBSOLETE, NEW STANDARD 59-09. 4. 59-03 OBSOLETE, NEW STANDARD 59-10. 5. ALL RULES AND NOTES ASSOCIATED WITH JEDEC DO-41 OUTLINE SHALL APPLY 6. POLARITY DENOTED BY CATHODE BAND. 7. LEAD DIAMETER NOT CONTROLLED WITHIN F DIMENSION. B K D F DIM A B D F K A F K http://onsemi.com 7 INCHES MIN MAX 0.161 0.205 0.079 0.106 0.028 0.034 --0.050 1.000 --- MILLIMETERS MIN MAX 4.10 5.20 2.00 2.70 0.71 0.86 --1.27 25.40 --- 1N4728A Series ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATION Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: ONlit@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. N. American Technical Support: 800-282-9855 Toll Free USA/Canada http://onsemi.com 8 1N4728A/D