• 1N3821A-1 THRU 1N3828A-1 AVAILABLE IN JAN, JANTX AND JANTXV PER MIL-PRF-19500/115 • 1 WATT ZENER DIODE 1N3821A thru 1N3828A and 1N3821A-1 thru 1N3828A-1 • DOUBLE PLUG CONSTRUCTION • METALLURGICALLY BONDED MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 1 watt @TL = 95°C Power Derating: 12.5 mW / °C above TL = 95°C Forward Voltage @ 200mA = 1.2 volts maximum ELECTRICAL CHARACTERISTICS @ 25°C CDI NOMINAL ZENER TYPE ZENER TEST MAX. DC NUMBER VOLTAGE CURRENT VZ @ 1ZT (NOTE 3) 1ZT ZZT @ 1ZT (NOTE 1) OHMS MAXIMUM ZENER IMPEDANCE ZZK @ 1ZK=1mA (NOTE 2) ZENER MAX. REVERSE CURRENT LEAKAGE CURRENT 1ZM lR @ VR VOLTS mA OHMS mA µA VOLTS 1N3821 1N3821A 1N3822 1N3822A 3.3 3.3 3.6 3.6 76 76 69 69 10 10 10 10 400 400 400 400 276 276 252 252 100 100 75 75 1 1 1 1 1N3823 1N3823A 1N3824 1N3824A 3.9 3.9 4.3 4.3 64 64 58 58 9 9 9 9 400 400 400 400 238 238 213 213 25 25 5 5 1 1 1 1 1N3825 1N3825A 1N3826 1N3826A 4.7 4.7 5.1 5.1 53 53 49 49 8 8 7 7 500 500 550 550 194 194 178 178 5 5 3 3 1 1 1 1 1N3827 1N3827A 1N3828 1N3828A 5.6 5.6 6.2 6.2 45 45 41 41 5 5 2 2 600 600 700 700 162 162 146 146 3 3 3 3 2 2 3 3 FIGURE 1 DESIGN DATA CASE: Hermetically sealed glass case, DO41. LEAD MATERIAL: Copper clad steel LEAD FINISH: Tin / Lead THERMAL RESISTANCE: (ROJEC): 80 ˚C/W maximum at L = .375 inch THERMAL IMPEDANCE: (ZOJX): 15 ˚C/W maximum NOTE 1 No suffix = + 10% tolerance on nominal Zener voltage, suffix “A” signifies +5%, suffix “C” signifies + 2%, suffix “D” signifies + 1%. POLARITY: Diode to be operated with the banded (cathode) end positive. NOTE 2 Zener impedance is derived by superimposing on 1ZT A 60Hz rms a.c. current equal to 10% of 1ZT. MOUNTING POSITION: Any. NOTE 3 Zener voltage is measured with the device junction in thermal equilibrium at an ambient temperature of 25°C + 3°C. 22 COREY STREET, MELROSE, MASSACHUSETTS 02176 PHONE (781) 665-1071 FAX (781) 665-7379 WEBSITE: http://www.cdi-diodes.com E-mail: [email protected] 1N3821A thru 1N3828A and 1N3821A-1 thru 1N3828A-1 1000 800 600 400 200 0 0 25 50 75 100 125 150 175 TL , Lead temperature (°C), 3/8” from body POWER DERATING CURVE 1000 ZZT, Zener Impedance (OHMS) Pd, Rated Power Dissipation (mW) FIGURE 2 100 1N3822A 10 1N3829A 1N3 826 A 1 .1 1.0 10 100 OPERATING CURRENT lZT (mA) FIGURE 3 ZENER IMPEDANCE VS. OPERATING CURRENT