* 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: -65C to +175C Storage Temperature: -65C to +175C DC Power Dissipation: 1 watt @TL = 95C Power Derating: 12.5 mW / C above TL = 95C Forward Voltage @ 200mA = 1.2 volts maximum ELECTRICAL CHARACTERISTICS @ 25C 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 A 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 25C + 3C. 6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (978) 689-0803 WEBSITE: http://www.microsemi.com 29 1N3821A thru 1N3828A and 1N3821A-1 thru 1N3828A-1 Pd, Rated Power Dissipation (mW) FIGURE 2 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 ZZT, Zener Impedance (OHMS) 1000 100 1N3822A 10 1N3 1N3829A 826 A 1 .1 1.0 10 100 OPERATING CURRENT lZT (mA) FIGURE 3 ZENER IMPEDANCE VS. OPERATING CURRENT 30