1N945B

• 1N941B, 1N943B, 1N944B AND 1N945B AVAILABLE IN JAN, JANTX PER MIL-PRF-19500/157 PER MIL-PRF-19500/157 • 11.7 VOLT NOMINAL ZENER VOLTAGE AND JANTXV 1N941 thru 1N945B and 1N941B-1 thru 1N945B-1 • 1N941B-1, 1N943B-1, 1N944B-1 AND 1N945B-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS • 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 = 15µ A @ 25°C & VR = 8 Vdc ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise speci½ed. JEDEC TYPE NUMBER ZENER VOLTAGE vz @ I ZT ZENER TEST CURRENT I ZT MAXIMUM VOLTAGE TEMPERATURE EFFECTIVE ZENER TEMPERATURE RANGE TEMPERATURE IMPEDANCE STABILITY COEFFICIENT ZZT ³V ZT MAXIMUM (Note 1) (Note 2) mV 88 181 239 44 90 120 18 36 47 9 18 24 4 9 12 °C 0 to + 75 -55 to +100 -55 to +150 0 to + 75 -55 to +100 -55 to +150 0 to + 75 -55 to +100 -55 to +150 0 to + 75 -55 to +100 -55 to +150 0 to + 75 -55 to +150 -55 to +150 % / °C 0.01 0.01 0.01 0.005 0.005 0.005 0.002 0.002 0.002 0.001 0.001 0.001 0.0005 0.0005 0.0005 VOLTS 1N941 1N941A 1N941B 1N942 1N942A 1N942B 1N943 1N943A 1N943B 1N944 1N944A 1N944B 1N945 1N945A 1N945B 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12—12.28 11.12 -12.28 mA 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 OHMS 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 FIGURE 1 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 L AKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (978) 689-0803 WEBSITE: http://www.microsemi.com 21 Pd, Rated Power Dissipation (mW) thru 1N945B INCLUDING -1 VERSIONS 1N941 600 500 400 300 200 100 0 0 25 50 75 100 125 150 175 TL, Lead temperature (C°) 3/8” from body FIGURE 2 POWER DERATING CURVE CHANGE IN TEMPERATURE COEFFICIENT (% / °C) +.0010 +.0005 0 -.0005 -.0010 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 OPERATING CURRENT lZT (mA) 9.5 FIGURE 3 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 100 50 ZENER IMPEDANCE ZZT (OHMS) 20 10 5 2 1 5 6 7 8 9 OPERATING CURRENT lZT (mA) 10 FIGURE 4 ZENER IMPEDANCE VS. OPERATING CURRENT 22