Absolute Maximum Ratings * Tolerance = 5% TA = 25C unless otherwise noted Symbol PD Parameter Power Dissipation @ TL 75C, Lead Length = 3/8" TJ, TSTG Operating and Storage Temperature Range Value 500 Units mW 4.0 mW/C -65 to +200 C Derate above 75C * These ratings are limiting values above which the serviceability of the diode may be impaired. DO-35 Glass case COLOR BAND DENOTES CATHODE Electrical Characteristics VZ (Volts) Device TA=25C unless otherwise noted ZZ ( ) (Note 1) Min. Typ. Max. @ IZ (mA) 1N957BT 1N958BT 1N959BT 1N960BT 1N961BT 6.46 7.125 7.79 8.645 9.5 6.8 7.5 8.2 9.1 10 7.14 7.875 8.61 9.555 10.5 18.5 16.5 15 14 12.5 1N962BT 1N963BT 1N964BT 1N965BT 1N966BT 10.45 11.4 12.35 14.25 15.2 11 12 13 15 16 11.55 12.6 13.65 15.75 16.8 1N967BT 1N968BT 1N969B 1N970B 1N971B 17.1 19 20.9 22.8 25.65 18 20 22 24 27 1N972B 1N973B 1N974B 1N975B 1N976B 28.5 31.35 34.2 37.05 40.85 1N977B 1N978B 1N979B 1N980B 1N981B 44.65 48.45 53.2 58.9 64.6 (c)2003 Fairchild Semiconductor Corporation ZZ @ IZ IR @ VR (Note 2) ZZK @ IZK IZM (mA) A Volts (Note 3) 4.5 5.5 6.5 7.5 8.5 700 700 700 700 700 mA 1.0 0.5 0.5 0.5 0.25 150 75 50 25 10 5.2 5.7 6.2 6.9 7.6 47 42 38 35 32 11.5 10.5 9.5 8.5 7.8 9.5 11.5 13 16 17 700 700 700 700 700 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 8.4 9.1 9.9 11.4 12.2 28 26 24 21 19 18.9 21 23.1 25.2 28.35 7.0 6.2 5.6 5.2 4.6 21 25 29 33 41 750 750 750 750 750 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 13.7 15.2 16.7 18.2 20.6 17 15 14 13 11 30 33 36 39 43 31.5 34.65 37.8 40.95 45.15 4.2 3.8 3.4 3.2 3.0 49 58 70 80 93 1000 1000 1000 1000 1500 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 22.8 25.1 27.4 29.7 32.7 10 9.2 8.5 7.8 7.0 47 51 56 62 68 49.35 53.55 58.8 65.1 71.4 2.7 2.5 2.2 2.0 1.8 105 125 150 185 230 1500 1500 2000 2000 2000 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 35.8 38.8 42.6 47.1 51.7 6.4 5.9 5.4 4.9 4.5 1N957B - 1N991B, Rev. D1 Zeners 1N957B - 1N991B Zeners 1N957B - 1N991B VZ (Volts) Device TA=25C unless otherwise noted ZZ ( ) (Note 1) Min. Typ. Max. @ IZ ZZ @ IZ 1N982B 1N983B 1N984B 1N985B 1N986B 71.25 77.9 86.45 95 104.5 75 82 91 100 110 78.75 86.1 95.55 105 115.5 1.7 1.5 1.4 1.3 1.1 1N987B 1N988B 1N989B 1N990B 1N991B 114 123.5 142.5 152 171 120 130 150 160 180 126 136.5 157.5 168 189 1.0 0.95 0.85 0.80 0.68 IR @ VR (Note 2) ZZK @ IZK 270 330 400 500 750 2000 3000 3000 3000 4000 mA 0.25 0.25 0.25 0.25 0.25 900 1100 1500 1700 2200 4500 5000 6000 6500 7100 0.25 0.25 0.25 0.25 0.25 IZM (mA) A Volts (Note 3) 5 5 5 5 5 56.0 62.2 69.2 76.0 83.6 4.1 3.7 3.3 3.0 2.7 5 5 5 5 5 91.2 98.8 114 121.6 136.8 2.5 2.3 2.0 1.9 1.7 Notes: 1. Zener Voltage (VZ) Measurement Nominal zener voltage is measured with the device junction in the themal equilibrium at the lead temperature (TL) at 30C 1C and 3/8" lead length. 2. Zener Impedance (ZZ) Derivation ZZT and ZZK are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for IZ(ac) = 0.1 IZ(dc) with the ac frequency = 60Hz. 3. Maximum Zener Current Ratings (IZM) The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve. (c)2003 Fairchild Semiconductor Corporation 1N957B - 1N991B, Rev. D1 Zeners 1N957B - 1N991B Electrical Characteristics (Continued) TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACExTM FACTTM ActiveArrayTM FACT Quiet SeriesTM BottomlessTM FAST CoolFETTM FASTrTM CROSSVOLTTM FRFETTM DOMETM GlobalOptoisolatorTM EcoSPARKTM GTOTM E2CMOSTM HiSeCTM EnSignaTM I2CTM Across the board. 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PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Rev. I3