1N935 thru 1N938B and • 1N935B-1, 1N937B-1 AND 1N938B-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/156 • 9.0 VOLT NOMINAL ZENER VOLTAGE 1N935B-1 thru 1N938B-1 • TEMPERATURE COMPENSATED ZENER REFERENCE DIODES • METALLURGICALLY BONDED MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500mW @ +50°C Power Derating: 4 mW / °C above +50°C REVERSE LEAKAGE CURRENT lR = 10µ A @ 25°C & VR = 6 Vdc ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise speci½ed. JEDEC TYPE NUMBER ZENER VOLTAGE vz @ I ZT ZENER TEST CURRENT I ZT MAXIMUM ZENER IMPEDANCE (Note 1) Z ZT VOLTAGE TEMPERATURE TEMPERATURE RANGE STABILITY ³V ZT MAXIMUM EFFECTIVE TEMPERATURE COEFFICIENT FIGURE 1 (Note 2) VOLTS mA OHMS °C % / °C 1N935 1N935A 1N935B 8.55—9.45 8.55—9.45 8.55—9.45 7.5 7.5 7.5 20 20 20 mV 67 139 184 0 to + 75 -55 to +100 -55 to +150 0.01 0.01 0.01 1N936 1N936A 1N936B 8.55—9.45 8.55—9.45 8.55—9.45 7.5 7.5 7.5 20 20 20 34 70 92 0 to + 75 -55 to +100 -55 to +150 0.005 0.005 0.005 1N937 1N937A 1N937B 8.55—9.45 8.55—9.45 8.55—9.45 7.5 7.5 7.5 20 20 20 13 28 37 0 to + 75 -55 to +100 -55 to +150 0.002 0.002 0.002 1N938 1N938A 1N938B 8.55—9.45 8.55—9.45 8.55—9.45 7.5 7.5 7.5 20 20 20 6.7 13.9 19 0 to + 75 -55 to +100 -55 to +150 0.001 0.001 0.001 DESIGN DATA CASE: Hermetically sealed glass case. DO – 35 outline. LEAD MATERIAL: Copper clad steel. LEAD FINISH: Tin / Lead POLARITY: Diode to be operated with the banded (cathode) end positive. MOUNTING POSITION: Any. NOTE 1 Zener impedance is derived by superimposing on lZT A 60Hz rms a.c. current equal to 10% of lZT. NOTE 2 The maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the speci½ed mV at any discrete temperature between the established limits, per JEDEC standard No. 5. 6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (978) 689-0803 WEBSITE: http://www.microsemi.com 19 1N935 1N938B Pd, Rated Power Dissipation (mW) thru INCLUDING -1 VERSIONS 600 500 400 300 200 100 0 0 25 50 75 100 125 150 TL, Lead temperature (C°) 3/8” from body FIGURE 2 POWER DERATING CURVE ZENER IMPEDANCE ZZT (OHMS) 100 50 40 30 20 10 5 4 3 2 1 5 6 7 8 9 OPERATING CURRENT lZT (mA) 10 FIGURE 3 ZENER IMPEDANCE VS. OPERATING CURRENT CHANGE IN TEMPERATURE COEFFICIENT ( %/°C) +.0015 +.0010 +.0005 0 -.0005 -.0010 -.0015 5 6 7 8 OPERATING CURRENT lZT (mA) 9 FIGURE 4 20 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 10 175