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features n maximum peak power dissipation: 6600 watts n meets iso7637-2 / iso16750-2 surge specifcation (varies by test condition) n rohs compliant* n aec-q101 compliant** applications n high peak power applications (up to rated limits) n high temperature applications (up to rated limits) n clamping diode n load switching and lighting absolute maximum ratings (@ t a = 25 c unless otherwise noted) sm8s-q transient voltage suppressor diode series *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. **q part number suffx for automotive and other applications requiring appropriate aec-q101 compliance. specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. parameter symbol value unit maximum peak pulse power dissipation (10/1000 s) p pk 6600 w maximum peak pulse power dissipation (10/10000 s) p pk 5200 w power dissipation with infnite heatsink (t c = 25 c) p d 8 w operating temperature range t j -55 to +175 c storage temperature range t stg -55 to +175 c general information bourns offers transient voltage suppressor diodes for surge and esd protection applications, in compact chip package do-218 size format. the transient voltage suppressor series offers a choice of working peak reverse voltage from 16 v up to 43 v. typical fast response times are less than 1.0 picosecond from 0 v to breakdown voltage. asia-pacifc: tel: +886-2 2562-4117 ? email: asiacus@bourns.com emea: tel: +36 88 885 877 ? email: eurocus@bourns.com the americas: tel: +1-951 781-5500 ? email: americus@bourns.com www.bourns.com electrical characteristics (@ t a = 25 c unless otherwise noted) unidirectional device bidirectional device breakdown voltage v br (volts) working peak reverse voltage maximum reverse leakage @ v rwm maximum reverse voltage @ i rsm maximum reverse surge current part no. part no. min. max. @ i t (ma) v rwm (v) i r (a) v rsm (v) i rsm (a) sm8s16a sm8s16ca 17.80 19.70 5 16.0 10 26.0 254.0 sm8s17a sm8s17ca 18.90 20.90 5 17.0 10 27.6 239.0 sm8s18a sm8s18ca 20.00 22.10 5 18.0 10 29.2 226.0 sm8s20a sm8s20ca 22.20 24.50 5 20.0 10 32.4 204.0 sm8s22a sm8s22ca 24.40 26.90 5 22.0 10 35.5 186.0 sm8s24a sm8s24ca 26.70 29.50 5 24.0 10 38.9 170.0 sm8s26a sm8s26ca 28.90 31.90 5 26.0 10 42.1 157.0 sm8s28a sm8s28ca 31.10 34.40 5 28.0 10 45.4 145.0 sm8s30a sm8s30ca 33.30 36.80 5 30.0 10 48.4 136.0 sm8s33a sm8s33ca 36.70 40.60 5 33.0 10 53.3 124.0 SM8S36A sm8s36ca 40.00 44.20 5 36.0 10 58.1 114.0 sm8s40a sm8s40ca 44.40 49.10 5 40.0 10 64.5 102.0 sm8s43a sm8s43ca 47.80 52.80 5 43.0 10 69.4 95.0 warning cancer and reproductive harm - www.p65warnings.ca.gov 203 *rohs compliant *rohs & **aec-q101 compliant *rohs compliant aec approved (select models) lead free *rohs compliant versions av ailable lead free versions are rohs compliant*
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. sm8s-q transient voltage suppressor diode series performance graphs load dump power characteristics steady state power dissipation pulse waveform maximum non-repetitive surge current load dump power (w) 6000 4000 5000 3000 2000 1000 0 0 25 50 75 100 125 150 175 case temperature, t c (c) (10 ms exponential waveform) input peak pulse current (%) 150 100 50 0 0 10 20 30 40 t - time (ms) t r = 10 s t d peak value (i ppm ) half value = i ppm t j = 25 c pulse width (td) is defined as the point where the peak current decays to 50 % of i ppm reverse surge power (w) 10000 1000 10 100 pulse width (ms) - 1/2 i pp exponential waveform power dissipation (w) 8.0 6.0 4.0 2.0 0 0 50 100 150 200 case temperature (c)
sm8s-q transient voltage suppressor diode series performance graphs typical transient thermal impedance typical junction capacitance transient thermal impedance (c/w) 100 10 1 0.1 0.01 0.01 0.1 1 10 100 r ja r jc t - pulse width (s) c j - junction capacitance (pf) 100,000 10,000 1,000 10 15 20 25 30 35 40 45 v wm - reverse stand-off voltage (v) measured at zero bias t j = 25 c f = 1.0 mhz v sig = 50 mv p-p measured at stand-off voltage v wm specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. performance graphs sm8s-q transient voltage suppressor diode series iso 16750-2 test a (10 pulse) - sm8s24a iso 7637-2 5a (1 pulse) - sm8s24a ri ohm 0 1 2 3 4 5 6 7 8 151 176.5 202 v vs t d : 100 ms t d : 200 ms t d : 350 ms ua: 28 v ri ohm 0 1 2 3 4 5 6 7 8 79 90 101 ua: 14 v v vs t d : 100 ms t d : 200 ms t d : 400 ms iso 16750-2 test a (10 pulse) - SM8S36A iso 7637-2 5a (1 pulse) - SM8S36A ri ohm 0 1 2 3 4 5 6 7 8 123 148.5 174 ua: 27 v v vs t d : 100 ms t d : 200 ms t d : 350 ms ri ohm 0 1 2 3 4 5 6 7 8 65 76 87 ua: 13.5 v v vs t d : 100 ms t d : 200 ms t d : 400 ms 3312 - 2 mm smd trimming potentiometer
specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. sm8s-q transient voltage suppressor diode series product dimensions dimension value a 15.5 0.5 (0.610 0.02) b 10.0 0.5 (0.394 0.02) c 4.85 0.15 (0.191 0.006) d 13.5 0.2 (0.531 0.008) e 8.5 0.2 (0.335 0.008) f 9.0 0.3 (0.354 0.012) g 3.0 0.5 (0.118 0.02) h 2.0 0.5 (0.079 0.02) d f a e b c h g metal heatsink dimensions: mm (inches) recommended footprint dimension value i 3.5 0.3 (0.138 0.012) j 10.0 0.5 (0.394 0.02) k 2.0 0.3 (0.079 0.012) l 2.7 0.3 (0.106 0.012) m 9.0 0.3 (0.354 0.012) n 14.5 0.4 (0.571 0.016) m i n j l k dimensions: mm (inches)
sm8s-q transient voltage suppressor diode series specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. physical specifcations case ........................................... molded plastic per ul class 94v-0 polarity....................... cathode band indicates unidirectional device no cathode band indicates bidirectional device how to order sm8s 18 ca - q package sm8s = do-218 package working peak reverse voltage 18 = 18 v rwm (volts) suffx a = 5 % tolerance unidirectional device ca = 5 % tolerance bidirectional device aec-q101 suffx q = aec-q101 compliant typical part marking environmental specifcations moisture sensitivity level ................................................................ 1 esd classifcation (hbm) ............................................................. 3b sm8sxxx yyww part number manufacturer?s trademark cathode band date code: yy = last two digits of year ww = week number
....... ....... ....... ....... ....... ....... ....... ....... p a f e t 120 d 2 d d 1 w 1 c index hole p 0 p 1 w b 10 pitches (min.) direction of feed 10 pitches (min.) end trailer device leader start d cddfn5-0504n - tvs/steering diode array packaging information the product will be dispensed in tape and reel format (see diagram below). devices are packed in accordance with eia 481 standard specifcations shown here. dimensions: mm (inches) 02/19 specifcations are subject to change without notice. users should verify actual device performance in their specifc applications. the products described herein and this document are subject to specifc legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. sm8s-q transient voltage suppressor diode series item symbol sm8s-q series carrier width a 10.77 0.20 (0.424 0.008) carrier length b 16.33 0.20 (0.643 0.008) carrier depth c 6.02 0.20 (0.237 0.008) sprocket hole d 1.50 + 0.10 / - 0.00 (0.059 + 0.004 / - 0.00) reel outside diameter d 330 2.0 (12.992 0.079) reel inner diameter d 1 60.0 (2.362) min. feed hole diameter d 2 13.0 + 0.50 / - 0.20 (0.512 + 0.020 / - 0.008) sprocket hole position e 1.75 0.10 (0.069 0.004) punch hole position f 11.5 0.10 (0.453 0.004) punch hole pitch p 16.0 0.10 (0.63 0.004) sprocket hole pitch p 0 4.00 0.10 (0.157 0.004) embossment center p 1 2.00 0.10 (0.079 0.004) overall tape thickness t 12 (0.472) max. tape width w 24.0 0.30 (0.945 0.012) reel width w 1 30.4 (1.197) max. quantity per reel -- 750
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