data sheet semiconductor http://www.yeashin.com 1 rev.02 20120403 1n957b~1n992b 500 mw do-35 hermetically sealed glass zener voltage regulators maximum ratings (note 1) rating symbol value unit maximum steady state power dissipation @ t l 75c, lead length = 3/8? derate above 75c p d 500 4.0 mw mw/c operating and storage temperature range t j , t stg -65 to +200 c 1. some part number series have lower jedec registered ratings. specification features ? zener voltage range = 6.8 v to 200 v ? esd rating of class 3 (>16 kv) per human body model ? do-35 package (do-204ah) ? double slug type construction ? metallurgical bonding mechanical characteristics case : double slug type, hermetically sealed glass finish : all external surfaces are corrosion resistant and leads are readily solderable. polarity : cathode indicated by polarity band mounting: any maximum lead temperature for soldering purposes 230c, 1/16? from the case for 10 seconds axial lead do35 cathode anode 1n 9x xb ymm 1n9xxb = device code y = year mm = month marking diagram 9x xt device marking diagram device code : 1n9xxt tolerance (t) : a = 10% : b = 5% : c = 2% : d = 1%
http://www.yeashin.com 2 rev.02 20120403 1n957b~1n992b electrical characteristics (t a = 25oc unless otherwise noted, v f = 1.5 v max @ i f = 200ma for all types) symbol parameter v z reverse zener voltage @ i zt i zt reverse zener current z zt maximum zener impedance @ i zt i zm maximum dc zener current i r reverse leakage current @ v r v r reverse voltage i f forward current v f forward voltage @ i f i zm maximum dc zener current electrical characteristics (t a = 25oc unless otherwise noted, v f = 1.5 v max @ i f = 200ma for all types) zener voltage (note 3.) zener impedance (note 4.) leakage current v z (volts) @ i zt z zt @ i zt z zk @ i zk i r @ v r i zm (note 5.) device (note 2.) device marking min nom max (ma) ( ? ?? ? )( ? ?? ? ) (ma) ( ? a) (volts) (ma) 1n957b 1n957b 6.46 6.8 7.14 18.5 4.5 700 1 150 5.2 47 1n958b 1n958b 7.125 7.5 7.875 16.5 5.5 700 0.5 75 5.7 42 1n959b 1n959b 7.79 8.2 8.61 15 6.5 700 0.5 50 6.2 38 1n960b 1n960b 8.645 9.1 9.555 14 7.5 700 0.5 25 6.9 35 1n961b 1n961b 9.5 10 10.5 12.5 8.5 700 0.25 10 7.6 32 1n962b 1n962b 10.45 11 11.55 11.5 9.5 700 0.25 5 8.4 28 1n963b 1n963b 11.4 12 12.6 10.5 11.5 700 0.25 5 9.1 26 1n964b 1n964b 12.35 13 13.65 9.5 13 700 0.25 5 9.9 24 1n965b 1n965b 14.25 15 15.75 8.5 16 700 0.25 5 11.4 21 1n966b 1n966b 15.2 16 16.8 7.8 17 700 0.25 5 12.2 19 1n967b 1n967b 17.1 18 18.9 7 21 750 0.25 5 13.7 17 1n968b 1n968b 19 20 21 6.2 25 750 0.25 5 15.2 15 1n969b 1n969b 20.9 22 23.1 5.6 29 750 0.25 5 16.7 14 1n970b 1n970b 22.8 24 25.2 5.2 33 750 0.25 5 18.2 13 1n971b 1n971b 25.65 27 28.35 4.6 41 750 0.25 5 20.6 11 1n972b 1n972b 28.5 30 31.5 4.2 49 1000 0.25 5 22.8 10 1n973b 1n973b 31.35 33 34.65 3.8 58 1000 0.25 5 25.1 9.2 1n974b 1n974b 34.2 36 37.8 3.4 70 1000 0.25 5 27.4 8.5 1n975b 1n975b 37.05 39 40.95 3.2 80 1000 0.25 5 29.7 7.8 1n976b 1n976b 40.85 43 45.15 3 93 1500 0.25 5 32.7 7 2. tolerance and type number designation (v z ) the type numbers listed have a standard tolerance on the nominal zener voltage of 5%. 3. 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. 4. 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 ac frequency = 60hz. 5. maximum zener current ratings (i zm ) values shown are based on the jedec rating of 400mw where the actual zener voltage (v z ) is known at the operating point, the zener current may be increased and is limited by the derating curve.
http://www.yeashin.com 3 rev.02 20120403 1n957b~1n992b electrical characteristics (t a = 25oc unless otherwise noted, v f = 1.5 v max @ i f = 200ma for all types) zener voltage (note 7.) zener impedance (note 8.) leakage current v z (volts) @ i zt z zt @ i zt z zk @ i zk i r @ v r i zm (note 9.) device (note 6.) device marking min nom max (ma) ( ? ?? ? )( ? ?? ? ) (ma) ( ? a) (volts) (ma) 1n977b 1n977b 44.65 47 49.35 2.7 105 1500 0.25 5 35.8 6.4 1n978b 1n978b 48.45 51 53.55 2.5 125 1500 0.25 5 38.8 5.9 1n979b 1n979b 53.2 56 58.8 2.2 150 2000 0.25 5 42.6 5.4 1n980b 1n980b 58.9 62 65.1 2 185 2000 0.25 5 47.1 4.9 1n981b 1n981b 64.6 68 71.4 1.8 230 2000 0.25 5 51.7 4.5 1n982b 1n982b 71.25 75 78.75 1.7 270 2000 0.25 5 56 4.1 1n983b 1n983b 77.9 82 86.1 1.5 330 3000 0.25 5 62.2 3.7 1n984b 1n984b 86.45 91 95.55 1.4 400 3000 0.25 5 69.2 3.3 1n985b 1n985b 95 100 105 1.3 500 3000 0.25 5 76 3 1n986b 1n986b 104.5 110 115.5 1.1 750 4000 0.25 5 83.6 2.7 1n987b 1n987b 114 120 126 1 900 4500 0.25 5 91.2 2.5 1n988b 1n988b 123.5 130 136.5 0.95 1100 5000 0.25 5 98.8 2.3 1n989b 1n989b 142.5 150 157.5 0.85 1500 6000 0.25 5 114 2 1N990B 1N990B 152 160 168 0.8 1700 6500 0.25 5 121.6 1.9 1n991b 1n991b 171 180 189 0.68 2200 7100 0.25 5 136.8 1.7 1n992b 1n992b 190 200 210 0.65 2500 8000 0.25 5 152 1.5 6. tolerance and type number designation (v z ) the type numbers listed have a standard tolerance on the nominal zener voltage of 5%. 7. 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. 8. 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 ac frequency = 60hz. 9. maximum zener current ratings (i zm ) values shown are based on the jedec rating of 400mw where the actual zener voltage (v z ) is known at the operating point, the zener current may be increased and is limited by the derating curve.
http://www.yeashin.com 4 rev.02 20120403 1n957b~1n992b device characteristics 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 140 160 180 200 t l , lead temperature ( c) figure 1. steady state power derating heat sinks 3/8" 3/8" p d , maximum steady state power dissipation (watts) ll 500 400 300 200 100 0 0 0.2 0.4 0.6 0.8 1 2.4-60 v 62-20 0 v l , lead length to heat sink (inch) jl , junction t o lead therma l resistanc e ( c/w) figure 2. typical thermal resistance typical leakage current at 80% of nominal breakdown voltage +2 5 c +12 5 c 1000 7000 5000 2000 1000 700 500 200 100 70 50 20 10 7 5 2 1 0.7 0.5 0.2 0.1 0.07 0.05 0.02 0.01 0.007 0.005 0.002 0.001 34 5 6 7 8 9101112 v z , nominal zener voltage (volts ) i , leakage current ( a) r figure 3. typical leakage current 13 14 15
http://www.yeashin.com 5 rev.02 20120403 1n957b~1n992b device characteristics +12 +10 +8 +6 +4 +2 0 -2 -4 89 v z , zener voltage (volts) figure 4a. range for units to 12 volts v z @i zt (note 2) range temperature coefficients (-55 c to +150 c temperature range; 90% of the units are in the ranges indicated.) 100 70 50 30 20 10 7 5 3 2 1 2 6 10 20 30 50 70 100 v z , zener voltage (volts) figure 4b. range for units 12 to 100 volts range v z @i z (note 2) 120 130 140 150 160 170 180 190 200 200 180 160 140 120 100 v z , zener voltage (volts) figure 4c. range for units 120 to 200 volts v z @ i zt (note 2) +6 +4 +2 0 -2 -4 34 v z , zener vo l t age (vo l ts) figure 5. effect of zener current note: below 3 volts and above 8 vol ts note: changes in zener current do not note: affect temperature coefficients 1ma 0.01ma v z @ i z t a = 2 5 c 1000 c, cap acit ance (pf) 500 200 100 50 20 10 5 2 1 1 2 5 10 20 50 100 v z , zener voltage (volts) figure 6a. typical capacitance 2.4-100 volts t a = 2 5 c 0v bias 1v bias 50% of v z bias 100 70 50 30 20 10 7 5 3 2 1 120 140 160 180 190 200 220 v z , zener voltage (volts) figure 6b. typical capacitance 120-200 volts t = 2 5 c 1 volt bias 50% of v bias 0 bias v z , tempera ture coefficient (mv/ c) 20ma c, cap acit ance (pf) v z , temperature coefficient (mv/ c) v z , temperature coefficient (mv/ c) v z , tempera ture coefficient (mv/ c) 3 45 710 11 12
http://www.yeashin.com 6 rev.02 20120403 1n957b~1n992b device characteristics 100 70 50 30 20 10 7 5 3 2 1 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000 p pk , peak surge power ( w a tts) p w , pulse width (ms) 5% duty cycle 10% duty cycle 20% duty cycle 11v-91v nonrepetitive 1.8v-10v nonrepetitive rect angular waveform t j = 25 c prior to initial pulse figure 7a. maximum surge power 1.8-91 volts 1000 700 500 300 200 100 70 50 30 20 10 7 5 3 2 1 0.01 0.1 1 10 100 1000 p pk , peak surge power (watts) pw, pulse width (ms) figure 7b. maximum surge power do-35 100-200volts 1000 500 200 100 50 20 10 1 2 5 0.1 0.2 0.5 1 2 5 10 20 50 100 i z , zener current (ma) figure 8. effect of zener current on zener impedance z z , dynamic impedance (ohms) z z , dynamic impedance (ohms) 1000 700 500 200 100 70 50 20 10 7 5 2 1 1 2 3 5 7 10 20 30 50 70 100 v z , zener voltage (volts) figure 9. effect of zener v oltage on zener impedance figure 10. t ypical forward characteristics rect angular waveform, tj = 25 c 100-20 0 vo l ts nonrepetitive t j = 2 5 c i z (rms) = 0.1 i z (dc) f = 60hz i z =1ma 5ma 20ma t j = 2 5 c i z (rms ) = 0.1 i z (dc) f = 60 hz v z = 2.7v 47v 27v 6.2v v f , for ward voltage (volts) 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1000 500 200 100 50 20 10 5 2 1 i f , for ward current (ma) minimum maximum 150 c 75 c 0 c 25 c
http://www.yeashin.com 7 rev.02 20120403 1n957b~1n992b device characteristics figure 1 1. zener voltage versus zener current - v z = 1 thru 16 volts v z , zener voltage (volts) i z , zener current (ma) 20 10 1 0.1 0.01 12 5 78910111213141516 t a = 2 5 c figure 12. zener voltage versus zener current - v z = 15 thru 30 volts v z , zener vo l t age (vo l ts) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 10 1 0.1 0.01 t a = 2 5 c i z , zener current (ma) 6 34
http://www.yeashin.com 8 rev.02 20120403 1n957b~1n992b device characteristics figure 13. zener voltage versus zener current - v z = 30 thru 105 volts v z , zener voltage (volts) 10 1 0.1 0.01 30 35 40 45 50 55 60 70 75 80 85 90 95 100 figure 14. zener voltage versus zener current - v z = 110 thru 220 volts v z , zener voltage (volts) 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 10 1 0.1 0.01 t a = 2 5 65 105 i z , zener current (ma) i z , zener current (ma)
http://www.yeashin.com 9 rev.02 20120403 1n957b~1n992b package outline & dimensions package outline package case outline do-35 millimeters inches dim min max min max a 0.46 0.55 0.018 0.022 b 3.05 5.08 0.120 0.200 c 25.40 38.10 1.000 1.500 d 1.53 2.28 0.060 0.090 notes: 1. all dimensions are within jedec standard. 2. do35 polarity denoted by cathode band.
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