surface mount transient voltage suppressors revision february 2, 2016 1 / 4 @ un semiconductor co., ltd. 2016 specifications are subject to change without notice. please refer to www.unsemi.com.tw for current information. UNS3K series tvs is designed for dc power supply equipment in outdoor exposure environment.it is used to replace the traditional ptc, gdt and tvs combination solution, which is widely used in gps module of the tower base station.etc working voltage: 5.0 to 6.0 v ? planar junction ? excellent clamping capability ? repetitive rate (duty cycle):0.01 % ? low profile package and low inductance ? 3000a peak pulse power capability at 8/20us waveform ? fast response time: typically less than 1.0ps from 0v to v br min ? high temperature soldering:260 /10s at terminals. ? for surface mounted application in order to optimize board space tvs devices are ideal for the protection of i/o interfaces, v cc bus and other vulnerable circuits used in telecom, computer, industrial and consumer electronic applications. parameter symbol value units operating junction temperature range t j C 55 to +125 c power dissipation on infinite heat sink at t l =75c p d 8.0 w peak pulse current with a 8/20us waveform i pp 3000 a storage temperature range t stg C 55 to +150 c maximum instantaneous forward voltage at 80a for unidirectional v f 5.0 v
surface mount transient voltage suppressors revision february 2, 2016 2 / 4 @ un semiconductor co., ltd. 201 6 specifications are subject to change without notice. please refer to www.unsemi.com.tw for current information. part number marking reverse stand-off voltage v rwm (v) breakdown voltage v br (v) @i t test current i t (ma) maximum clamping voltage v c @i pp (v) maximum peak pulse current i pp (a) maximum reverse leakage i r @v rwm (a) uni bi uni bi min max UNS3K5.0a UNS3K5.0ca 3k5a 3k5c 5.0 6.40 7.10 10 20 3000 800 UNS3K6.0a UNS3K6.0ca k af k cf 6.0 6.50 7.40 10 22 3000 800 150 100 50 0 i ppm - peak pulse current, % i rsm t r =8sec peak value ippm half value i ppm (i ppm /2) t c 0 20 40 60 80 t j =25c pulse width(td) is de?ned as the point where the peak current decays to 50% of i ppm t - time (us) 0 25 50 75 100 125 150 175 100 80 60 40 20 0 t a -ambient temperature(c) peak pulse power (p pp ) or current (i pp ) derating in percentage % note1: surge waveform: 8/20 s v r stand-off voltage -- maximum voltage that can be applied v br breakdown voltage v c clamping voltage -- peak voltage measured across the suppressor at a specified ipp i r reverse leakage current
surface mount transient voltage suppressors revision february 2, 2016 3 / 4 @ un semiconductor co., ltd. 2016 specifications are subject to change without notice. please refer to www.unsemi.com.tw for current information. reflow condition leadCfree assembly pre heat -temperature min (t s(min) ) 150c -temperature max (t s(max) ) 200c - time (min to max) (t s ) 60 -180 seconds average ramp up rate ( liquidus temp t l ) to peak 3c/second max t s(max) to tl - ramp-up rate 3c/second max reflow - temperature (t l ) (liquidus) 217c - time (min to max) (t s ) 60 -150 seconds peak temperature (t p ) 260 +0/-5c time within 5c of actual peak temperature (t p ) 30 seconds ramp-down rate 6c/second max time 25c to peak temperature (t p ) 8 minutes max do not exceed 260c u n s 3 k 6 . 0 c a 5% v br voltage tolerance bi-directional v r voltage 8/20us waveform 3ka surge logo ramp-down preheat critical zone t l to t p time to peak temperature (t 25 to peak) t p t l t s(max) t s(min) 25 temperature ramp-up time
surface mount transient voltage suppressors revision february 2, 2016 4 / 4 @ un semiconductor co., ltd. 2016 specifications are subject to change without notice. please refer to www.unsemi.com.tw for current information. inches millimeters dimensions min max min max a 0. 114 0. 126 2. 86 3.160 b 0.260 0.280 6.520 7.020 c 0. 220 0. 245 5.520 6 .150 d 0.079 0.103 1.980 2.590 e 0. 030 0. 060 0.750 1 .510 f - 0.008 - 0.203 g 0. 305 0. 320 7.640 8 .020 h 0.006 0.012 0.152 0.305 i 0.129 - 3 .300 - j 0.094 - 2.400 - k - 0.165 - 4 . 200 l 0.094 - 2.400 - dimensions do- 214 a b (sm c) cathode b and part number component package quantity tape & reel UNS3Kxxxx do - 214ab 3000 13inch packaging
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