revision: february 29, 2012, 15:16 transient voltage suppression diodes 7 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 7 surface mount C 200w > smf series smf series description features maximum ratings and thermal characteristics (t a =25 o c unless otherwise noted) parameter symbol value unit peak pulse power dissipation at t a =25oc by 10x1000s (note 1) p ppm 200 w thermal resistance junction- to- ambient r thj-a 220 c/w thermal resistance junction- to- lead r thj-l 100 c/w operating and storage temperature range t j, t stg -55 to 150 c notes: 1. non-repetitive cur rent pulse, per fig. 3 and derated above t a =25oc per fig. 2. 2. non-repetitive cur rent pulse per fig. 4 and derated above t a =25oc per fig 2. the smf series is designed specifcally to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. smf package is 50% smaller in footprint when compare to sma package and delivering one of the lowest height profles (1.1mm) in the industry. applications smf devices are ideal for the protection of i/o interfaces, v cc bus and other vulnerable circuit used in cellular phones, portable devices, business machines, power supplies and other consumer applications. ?compatible with industrial standard package sod-123 ? for surf ace mounted applications to optimize board space ? lo w profle: maximum height of 1.1mm. ? typical f ailure mode is short from over-specifed voltage or current ? whisker test is conducted based on jedec jesd20 1a per its table 4a and 4c. ? iec-610 00-4-2 esd 15kv(air), 8kv (contact). ? esd protection of data lines in accordance with iec 61 000-4-2 (iec801-2). ? eft protection of data lines in accordance with iec 61 000-4-4 (iec801-4). ? low inductance, excellent clamping capability ? 200w peak pulse power capability at 10 x 1000s waveform, repetition rate (duty cycle): 0.01% ? fast response time: t ypically less than 1.0ns from 0 volts to v br min ? high temperature soldering: 260c/40 seconds at terminals ? glass passiv ated junction ? built-in strain relief ? matte tin leadCfree plated ? halogen-free and r ohs compliant hf rohs smf series 1 rohs
revision: february 29, 2012, 15:16 transient voltage suppression diodes 8 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 8 surface mount C 200w > smf series electrical characteristics (t a =25c unless otherwise noted) part number marking breakdown voltage v br (volts) @ i t test current i t (ma) reverse stand off voltage v r (v) maximum reverse leakage @ v r i r (a) maximum peak pulse current i pp (a) maximum clamping voltage @i pp v c (v) code min max smf5.0a ae 6.4 7 10 5.0 400 21.7 9.2 smf6.0a ag 6.67 7.37 10 6.0 400 19.4 10.3 smf6.5a ak 7.22 7.98 10 6.5 250 1 7. 9 11. 2 smf7.0a am 7.78 8.6 10 7.0 100 16.7 12 smf7.5a ap 8.33 9.21 1 7.5 50 15.5 12.9 smf8.0a ar 8.89 9.83 1 8.0 25 14.7 13.6 smf8.5a at 9.44 10.4 1 8.5 10 13.9 14.4 smf9.0a av 10.0 11. 1 1 9.0 5 13 15.4 smf10a ax 11. 1 12.3 1 10 2.5 11. 8 17 smf11a az 12.2 13.5 1 11 2.5 11 18.2 smf12a be 13.3 14.7 1 12 2.5 10.1 19.9 smf13a* bg 14.4 15.9 1 13 1. 0 9.3 21.5 smf14a* bk 15.6 1 7. 2 1 14 1. 0 8.6 23.2 smf15a* bm 16.7 18.5 1 15 1. 0 8.2 24.4 smf16a* bp 1 7. 8 19.7 1 16 1. 0 7. 7 26 smf17a* br 18.9 20.9 1 17 1. 0 7. 2 27.6 smf18a* bt 20.0 22.1 1 18 1. 0 6.8 29.2 smf20a* bv 22.2 24.5 1 20 1. 0 6.2 32.4 smf22a* bx 24.4 26.9 1 22 1. 0 5.6 35.5 smf24a* bz 26.7 29.5 1 24 1. 0 5.1 38.9 smf26a* ce 28.9 31.9 1 26 1. 0 4.8 42.1 smf28a* cg 31.1 34.4 1 28 1. 0 4.4 45.4 smf30a* ck 33.3 36.8 1 30 1. 0 4.1 48.4 smf33a* cm 36.7 40.6 1 33 1. 0 3.8 53.3 smf36a* cp 40.0 44.2 1 36 1. 0 3.4 58.1 smf40a* cr 44.4 49.1 1 40 1. 0 3.1 64.5 smf43a* ct 47.8 52.8 1 43 1. 0 2.9 69.4 smf45a* cv 50.0 55.3 1 45 1. 0 2.8 72.7 smf48a* cx 53.3 58.9 1 48 1. 0 2.6 77.4 smf51a* cz 56.7 62.7 1 51 1. 0 2.4 82.4 smf54a* de 60.0 66.3 1 54 1. 0 2.3 87.1 notes: 1. v br measured after i t applied for 300s, i t = sequare wave pulse or equivalent. 2. surge current waveform per 10 x 1000s exponential wave and derated per fig.2. 3. all terms and symbols are consistent with ansi/ieee c62.35. 4. parts with * are still under development, and will be available in q3,2012. 2
revision: february 29, 2012, 15:16 transient voltage suppression diodes 9 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 9 surface mount C 200w > smf series ratings and characteristic curves (t a =25c unless otherwise noted) vo lt age tr an si en ts ti me vo lt age cr os s tv s current cr os s tv s voltage or current figure 1 - tvs transients clamping waveform 3 0. 1 1 10 0.00000 10 .0 00010 .0 001 0.00 1 t d -pulse width (sec.) p ppm -peak pulse power (kw) figure 2 - peak pulse power rating curve i-v curve characteristics ?peak pulse power dissipation- p -- max power dissipation ?stand-off voltage - v -- maximum voltage that can be applied to the tvs without operation ?breakdown voltage - v -- maximum current that fows though the tvs at a specifed test current (i t ) ?clamping voltage - v -- peak voltage measured across the suppressor at a specifed ippm (peak impulse current) ?reverse leakage current - i -- current measured at v r ?forward voltage drop for uni-directional - v vc v br v r i r i t i pp v unidirectional vc v br v r i r i t i pp v vc v br v r i pp i r i t bidirectional v f
revision: february 29, 2012, 15:16 transient voltage suppression diodes 10 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 10 surface mount C 200w > smf series ratings and characteristic curves (t a =25c unless otherwise noted) 0 0. 2 0. 4 0. 6 0. 8 1 1. 2 -5 51 07 51 40 te mp erat ur e (oc) v f - typical forward dropped voltage figure 6 - forward voltage 4 0 20 40 60 80 100 02 5507 51 00 12 51 50 17 5 t a -a mb ie nt te mp erat ur e (oc) peak pulse power (p pp ) or current (i pp ) derating in percentage % figure 3 - pulse derating curve i ppm - peak pulse current, % i rsm 0 0 50 10 0 15 0 1. 0 2.0 3.0 4.0 t r =10sec peak value i ppm i ppm 2 t j =25c pulse width(td) is de?ned as the point where the peak current decays to 50% of i ppm 10/1 00 0sec. waveform as de?ned by r.e.a t d t-time (ms) half value i ppm ( ) figure 4 - pulse waveform - 10x1000 s 0 0.25 0.50 0.75 1.00 1.25 1.50 02 5507 5 100 125 150 175 p m(av) , steady state power dissipation (w) t l - tab temperature (oc) figure 5 - steady state power dissipation derating curve 10 100 1000 10000 11 0 100 v br - re vers e br ea k down vo lt ag e c j (pf) measured@50%vr measured@vr=0v figure 7 - c j vs working peak reverse voltage
revision: february 29, 2012, 15:16 transient voltage suppression diodes 11 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 11 surface mount C 200w > smf series physical specifcations case sod-123 plastic over glass passivated junction polarity color band denotes cathode e xcept bipolar terminal matte tin-plated leads, solderable per jesd22-b102d environmental specifcations temperature cycle jesd22-a104 pressure cooker jesd22-a102 high temp. storage jesd22-a103 htrb jesd22-a108 thermal shock jesd22-a106 soldering parameters temperature (t) ti me (t) t s(min) t s(max) t l t p t s preheat t l t p ramp-up critical zone t l to t p ramp-down t 25?c to peak 25?c refow condition leadCfree assembly pre heat - temperature min (t s(min) ) 150c - temperature max (t s(max) ) 200c - time (min to max) (t s ) 60 C 180 secs average ramp up rate (liquidus temp (t l ) to peak 3c/second max t s(max) to t l - ramp-up rate 3c/second max refow - temperature (t l ) (liquidus) 217c - time (min to max) (t s ) 60 C 150 seconds peak temperature (t p ) 260 +0/-5 c time within 5c of actual peak temperature (t p ) 20 C 40 seconds ramp-down rate 6c/second max time 25c to peak temperature (t p ) 8 minutes max. do not exceed 260c 5
revision: february 29, 2012, 15:16 transient voltage suppression diodes 12 smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. revision: february 29, 2012, 15:16 transient voltage suppression diodes 12 surface mount C 200w > smf series dimensions - sod-123 package dimensions millimeters inches min max min max a 2.50 2.90 0.0984 0.1142 b 3.40 3.90 0.1339 0.1535 c 0.70 1.20 0.0275 0.0472 d 1.50 2.00 0.0591 0.0787 e 0.35 0.90 0.0138 0.0354 f 0.05 0.26 0.0020 0.0102 g 0.00 0.10 0.0000 0.0039 h 0.95 1. 10 0.0374 0.0433 a b c d e e f h g 1. 6 (0.062) 1. 3 (0.051) 1. 4 (0.055) mounting pad l ayout part numbering system v r vo lta ge 5% v br vo lta ge tolerance smf xx a series part marking system packaging part number component package quantity packaging option packaging specifcation smfxxx sod-123 3000 tape & reel C 8mm/7 tape eia rs-481 xx marking code e banddohtac l f ym trace code marking y:year code m: month code cathode tape and reel specifcation 0.31 (8.0) 0.157 (4.0) 0.157 (4.0) 0.33 (8.5) 0.80 (20.2) arbor hole dia. 7.0 (178) dimensions are in inches (and millimeters). direction of feed 0.059 dia (1.5) cover tape 6
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