1N4728A DIODES | Alldatasheet
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Characteristic Symbol Value Unit Zener Current (see Table page 2) IZ Pd / VZ mA Power Dissipation Derate Above 50°C (Note 1) Pd 1.0 6.67 W mW/°C Thermal Resistance - Junction to Ambient Air R/c113JA 175 °C/W Forward Voltage @ IF = 200 mA VF 1.2 V Operating and Storage Temperature Range Tj,T STG -65 to + 200 °C Note: 1. Valid provided that leads are kept at T L @ 50/c176C with lead length = 9.5mm (3/8”) from case. Maximum Ratings @ TA = 25°C unless otherwise specified Mechanical Data /c1831.0 Watt Power Dissipation /c1833.3V - 100V Nominal Zener Voltage /c183Standard VZ Tolerance is 5% /c183Case: DO-41, Glass /c183Terminals: Solderable per MIL-STD-202, Method 208 /c183Polarity: Cathode Band /c183Marking: Type Number /c183Approx. Weight: 0.35 grams A AB C D DO-41 Glass Dim Min Max A 25.40 — B — 4.70 C — 0.863 D — 2.71 All Dimensions in mm
DS18007 Rev. 13 - 2 2 of 3 1N4728A-1N4764A www.diodes.com Type Number Nominal Zener Voltage (Note 2) Test Current Maximum Zener Impedance (Note 3) Maximum Reverse Leakage Current Max Surge Current 8.3ms Temperature Coefficient @ IZT VZ @ IZT IZT ZZT @ IZT ZZK @ IZK IZK IR @V R IZS (V) (mA) ( /c87) (/c87) (mA) (µA) (V) (mA) %/°C 1N4762A 82 3.0 200 3000 0.25 5.0 62.2 55 /c190 1N4763A 91 2.8 250 3000 0.25 5.0 69.2 50 /c190 1N4764A 100 2.5 350 3000 0.25 5.0 76.0 45 /c190 Notes: 2. Measured under thermal equilibrium and dc (I ZT) test conditions. 3. 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 (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. Electrical Characteristics @ TA = 25°C unless otherwise specified
DS18007 Rev. 13 - 2 3 of 3 1N4728A-1N4764A www.diodes.com 0.2 0.4 0.6 0.8 1.0 0 40 80 120 160 200 P , TOTAL POWER DISSIPATION (W)d T , AMBIENT TEMPERATUREA Fig.1 Power Dissipation vs Ambient Temperature 250 0 5 15 20 25 30 l, Lead Length (mm) Fig.2 Typical Thermal Resistance vs. Lead Length 200 100 150 100 1000 11 0 1 0 0 V , ZENER VOLTAGE (V)Z Fig.4 T ypical Zener Impedance vs. Zener Voltage I = 1 m AZ 2mA 10mA 20mA 5mA 100 1000 01 0 2 03 0 4 05 0 6 0 C , DIODE CAPACITANCE (pF)j V , ZENER VOLTAGE (V)Z Fig.3, Junction Capacitance vs Zener Volta ge f= 1 M H z T = 25CA V = 0 VR V = 2 VR V = 5 VR V = 2 0 VR V = 3 0 VR