9 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. surface mount C 200w > 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-repetitiv e current pulse, per fig. 4 and derated above t a =25oc per fig. 3. 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 deliverying 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 ? f or surface mounted applications to optimize board space ? l ow profle: maximum height of 1.1mm. ? t ypical failure mode is short from over-specifed voltage or current ? whisk er test is conducted based on jedec jesd201a per its table 4a and 4c ? iec-61 000-4-2 esd 15kv(air), 8kv (contact) ? esd protection of dat a lines in accordance with iec 61000-4-2 (iec801-2) ? eft protection of dat a lines in accordance with iec 61000-4-4 (iec801-4) ? low inductance, excellent clamping capability ? 20 0w peak pulsepower capability at 10 x 1000s waveform, repetition rate (duty cycle): 0.01% ? f ast response time: typically less than 1.0ns from 0 volts to v br min ? high temperat ure soldering: 260c/40 seconds at terminals ? glass passivated junction ? built-in strain relief ? mat te tin leadCfree plated ? halogen-free and rohs compliant hf rohs smf series rohs smf series
10 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. 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. 0 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.
11 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. 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 across tv s current through tvs voltage or current figure 1 - tvs transients clamping waveform 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 p ppm peak pulse power dissipation -- max power dissipation v r stand-off voltage -- maximum voltage that can be applied to the tvs without operation v br breakdown voltage -- maximum current that fows though the tvs at a specifed test current (i t ) v c clamping voltage -- peak voltage measured across the suppressor at a specifed ippm (peak impulse current) i r reverse leakage current -- current measured at v r v f forward voltage drop for uni-directional vc v br v r i r i t i pp v uni-directional v f continues on next page.
12 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. surface mount C 200w > smf series ratings and characteristic curves (t a =25c unless otherwise noted) (continued) 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 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
13 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. 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
14 revised: july 17, 2012 tvs diode arrays (spa ? family of products) transient voltage suppression diodes smf series ?2012 littelfuse, inc. specifcations are subject to change without notice. please refer to http://www.littelfuse.com/series/smf.html for current information. 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
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