?2007 fairchild semiconductor corporation 1 www.fairchildsemi.com 1n957b - 1n979b rev. f1 1n957b - 1n979b zener diodes june 2007 1n957b - 1n979b zener diodes absolute maximum ratings * t a = 25 c unless otherwise noted * these ratings are limiting values above which the serviceability of the diode may be impaired. electrical characteristics t a =25 c unless otherwise noted symbol parameter value units p d power dissipation @ tl 75 c, lead length = 3/8? 500 mw derate above 75 c 4.0 mw/ c t j , t stg operating and storage temperature range -65 to +200 c device v z (volts) (note 1) z z ( ) (note 2) i r @ v r i zm (ma) (note 3) min. typ. max. @ i z (ma) z z @ i z z zk @ i zk a volts ma 1n957b 1n958b 1n959b 1n960b 1n961b 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 4.5 5.5 6.5 7.5 8.5 700 700 700 700 700 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 1n962b 1n963b 1n964b 1n965b 1n966b 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 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 1n967b 1n968b 1n969b 1n970b 1n971b 17.1 19 20.9 22.8 25.652 18 20 22 24 27 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 1n972b 1n973b 1n974b 1n975b 1n976b 8.5 31.35 34.2 37.05 40.85 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 1n977b 1n978b 1n979b 44.65 48.45 53.2 47 51 56 49.35 53.55 58.8 2.7 2.5 2.2 105 125 150 1500 1500 2000 0.25 0.25 0.25 5 5 5 35.8 38.8 42.6 6.4 5.9 5.4 do-35 glass case color band denotes cathode tolerance = 5%
2 www.fairchildsemi.com 1n957b - 1n979b rev. f1 1n957b - 1n979b zener diodes notes: 1. zener voltage (v z ) measurement nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (t l ) at 30 c 1 c and 3/8? lead length. 2. zener impedance (z z ) derivation z zt and z zk are measured by dividing the ac voltage drop across the device by the ac current applied. the specified limits are for i z(ac) = 0.1 i z(dc) with the ac frequency = 60hz. 3. maximum zener current ratings (i zm ) 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. top mark information device line 1 line 2 line 3 1n957b 1n958b 1n959b 1n960b 1n961b logo logo logo logo logo 57 58 59 60 61 b b b b b 1n962b 1n963b 1n964b 1n965b 1n966b logo logo logo logo logo 62 63 64 65 66 b b b b b 1n967b 1n968b 1n969b 1n970b 1n971b logo logo logo logo logo 67 68 69 70 71 b b b b b 1n972b 1n973b 1n974b 1n975b 1n976b logo logo logo logo logo 72 73 74 75 76 b b b b b 1n977b 1n978b 1n979b logo logo logo 77 78 79 b b b
3 www.fairchildsemi.com 1n957b - 1n979b rev. f1 1n957b - 1n979b zener diodes top mark information (continued) general requirements: 1.0 cathode band 2.0 first line: f - fairchild logo 3.0 second line: device name - for 1nxx series: 4 th to 5 th characters of the device name. for bzxx series: 5 th to 6 th characters of the device name. 4.0 third line: device name - for 1nxx series: 6 th to 7 th characters of the device name. for bzxyy series: voltage rating 5.0 devices shall be marked as required in the device specification (pid or fsc test spec). 6.0 maximum no. of marking lines: 3 7.0 maximum no. of digits per line: 2 8.0 fsc logo must be 20 % taller than the alphanumeric marki ng and should occupy the 2 charac ters of the specified line. 9.0 marking font: arial (except fsc logo) 10.0 first character of each marking line must be aligned vertically. 11.0 all device markings must be bas ed on fairchild device specification. f 22 9b 1 st line: f - fairchild logo 2 nd line: device name - 4 th to 5 th characters of the device name. or 5 th to 6 th characters for bzxyy series 3 rd line: device name - 6 th to 7 th characters of the device name. or voltage rating for bzxyy series
trademarks the following are registered and unregistered trademarks fairchild semiconductor owns or is authorized to use and is not intend ed to be an exhaustive list of all such trademarks. 1n957b - 1n979b zener diodes disclaimer fairchild semiconductor reserves the righ t to make changes without further notice to any products herein to improve reliability, functio n or design. fairchild does no t assume any liability arising out of the application or use of any product or circuit described herein;neither does it convey any li cense under its patent rights, nor the rights of others. these specifications do not expand the terms of fairchild?s worldwide terms and conditions, spe- cifically the warranty therein, which covers these products. life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body , or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in th e labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reas onably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms datasheet identification product status definition advance information formative or in design this datasheet contains the design specific ations for product develop- ment. 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 cont ains 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 dis- continued by fairchild semiconductor.the datasheet is printed for ref- erence information only. gto? hisec? i-lo ? implieddisconnect? intellimax? isoplanar? microcoupler? micropak? microwire? msx? msxpro? ocx? ocxpro? optologic ? optoplanar? ? pacman? pop? power220 ? power247 ? poweredge? powersaver? powertrench ? programmable active droop? qfet ? qs? qt optoelectronics? quiet series? rapidconfigure? rapidconnect? scalarpump? smart start? spm? superfet? supersot?-3 supersot?-6 supersot?-8 tcm? the power franchise ? tinyboost? tinybuck? tinylogic ? tinyopto? tinypower? tinywire? trutranslation? serdes? uhc ? unifet? vcx? wire? acex? across the board. around the world.? activearray? bottomless? build it now? coolfet? crossvolt ? ctl ? current transfer logic ? dome? e 2 cmos? ecospark ? ensigna? fact quiet series? fact ? fast ? fastr? fps? frfet? globaloptoisolator? rev. i23 4 www.fairchildsemi.com 1n957b - 1n979b rev. f1 1n957b - 1n979b zener diodes
careers | sitema go datasheets, samples, buy technical information applications design center support company investors my f a home >> find products >> product status/pricing/packaging 1n974b zener diode features back to top contents ? features ? product status/pricing/packaging ? order samples ? qualification support zeners datasheet download this datasheet e - mail this datasheet this page print version product product status pb-free status pricing* package type leads packing method package marking convention** 1n974b full production $0.0218 do-35 2 bulk line 1: $y (fairchild logo) line 2: 974 line 3: b line 4: &2 1n974b_t50a full production n/a do-35 2 ammo line 1: $y (fairchild logo) line 2: 974 line 3: b line 4: &2 1n974b_t50r full production n/a do-35 2 tape reel line 1: $y (fairchild logo) line 2: 974 line 3: b line 4: &2 * fairchild 1,000 piece budgetary pricing ** a sample button will appear if the part is available through fa irchild's on-line samples program. if there is no sample butt on, please contact a fairchild distributor to obtain samples related links request samples how to order products product change notices (pcns) support sales support quality and reliability design cente r pa g e 1 of 2 product folder - fairchil d p/n 1n974b - zener diode 16-au g -2007 mhtml:file://c:\temp\1n974b _ t50a.mht
back to top qualification support click on a product for detailed qualification data back to top indicates product with pb -free second-level interconne ct. for more information click here. package marking information for product 1n974b is available. click here for more information . product 1n974b 1n974b_t50a 1n974b_t50r ? 2007 fairchild semiconductor products | design center | support | company news | investors | my fairchild | contact us | site index | privacy policy | site terms & conditions | standard terms & conditions o pa g e 2 of 2 product folder - fairchil d p/n 1n974b - zener diode 16-au g -2007 mhtml:file://c:\temp\1n974b _ t50a.mht
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