surface mount transient voltage suppressors revision february 2 , 201 5 1 / 4 @ un semiconductor co., ltd. 2013 specifications are subject to change without notice. please refer to www. unsemi .com .tw for current information. sm8 z series 1 4 to 43 v 6600w un semiconductor co., ltd. www. unsemi .com .tw note: (1)non - repetitive current pulse per fig.2 and derated above t a = 25 c per fig.1 the sm 8 z series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. working voltage: 14 to 43 v peak pulse power: 6600 w ? glass passivated chip ? 6600 w peak pulse power capability with a 10/1000 us waveform, repetitive rate (duty cycle):0.01 % ? t j = 175 c capability suitable for high reliability and automotive requirement ? meets iso7637 - 2 surge specification (varied by test condition) meet aec - q101 requirement ? low leakage ? uni - directional polarity ? excellent clamping capability ? very fast response time ? rohs compliant use in sensitive electronics protection against voltage transients induced by inductive load switching and lighting, especially for automotive load dump protection application ? case: do - 218ab ? epoxy: ul 94v - 0 rate flame retardant ? polarity: heatsink is anode v r wm 1 4 v to 43v p ppm (10/1000s) 6600w p ppm (10/1000 0 s) 5200w p d 8w i fsm 700a t j max. 175c package do - 218ab parameter symbol value units peak pulse power dissipation with 10/1000s waveform p ppm 6600 w with 10/10000s waveform 5200 power dissipa tion on infinite heat sink at t l =25c (fig.1) p d 8 w peak pulse current with a 10/1000s waveform i pp see next table a peak forward surge current 8.3 ms single half sine wave i fsm 700 a operating junction and storage temperature range t j , t stg C 55 to +175 c typical thermal resistance, junction to case r jc 0.90 c /watt d escription features mechanical data primary characteristics applications maximum ratings and thermal characteristics (t a =25 unless otherwise noted)
surface mount transient voltage suppressors revision february 2 , 201 5 2 / 4 @ un semiconductor co., ltd. 2013 specifications are subject to change without notice. please refer to www. unsemi .com .tw for current information. sm8 z series 1 4 to 43 v 6600w un semiconductor co., ltd. www. unsemi .com .tw part number stand - off voltage v mw (v) breakdown voltage v br (v) test current i t (ma) maximum reverse leakage i r @v rwm (ua) maximum i r @v rwm t j =175 (ua) maximum reverse surge current i pp (a) (1) maximum clamping voltage v c @i pp (v) min . max . sm8 z 1 4a 14 sm8z15a 16.70 18.50 5 10 150 15 270.0 24.4 sm8z16a 17.80 19.70 5 10 150 16 254.0 26.0 sm8z17a 18.90 20.90 5 10 150 17 239.0 27.6 sm8z18a 20.00 22.10 5 10 150 18 226.0 29.2 sm8z20a 22.20 24.50 5 10 150 20 204.0 32.4 SM8Z22A 24.40 26.90 5 10 150 22 186.0 35.5 sm8z24a 26.70 29.50 5 10 150 24 170.0 38.9 sm8z26a 28.90 31.90 5 10 150 26 157.0 42.1 sm8z28a 31.10 34.40 5 10 150 28 145.0 45.4 sm8z30a 33.30 36.80 5 10 150 30 136.0 48.4 sm8z33a 36.70 40.60 5 10 150 33 15.60 17.20 5 10 150 14 284.0 23.2 sm8z1 5a 16.70 18.50 5 10 150 15 270.0 24.4 sm8z1 6a 17.80 19.70 5 10 150 16 254.0 26.0 sm8z1 7a 18.90 20.90 5 10 150 17 239.0 27.6 sm8z1 8a 20.00 22.10 5 10 150 18 226.0 29.2 sm8z2 0a 22.20 24.50 5 10 150 20 204.0 32.4 sm8z2 2a 24.40 26.90 5 10 150 22 186.0 35.5 sm8z2 17.20 5.0 10 1 50 284.0 23.2 sm8 z 1 5a 15 16.70 18.50 5.0 1 0 1 50 270.0 24.4 sm8 z 1 6a 16 1 7.80 19.70 5.0 10 1 50 254.0 2 6.0 sm8 z 1 7a 17 1 8.90 20.90 5.0 10 1 50 239.0 27.6 sm8 z 1 8a 18 20.00 22.10 5.0 10 150 226.0 29.2 sm8 z20a 20 22.20 24.50 5.0 10 150 204.0 32.4 sm8 z22a 22 24.40 26.90 5.0 10 150 186.0 35.5 sm8 z24a 24 26.70 29.50 5.0 10 150 170.0 38.9 sm8 z26a 26 28.90 31.90 5.0 10 150 157.0 42.1 sm8 z 28 a 28 31.10 34.40 5.0 10 150 145.0 45.4 sm8 z 30 a 30 33.30 36.80 5.0 10 150 136.0 48.4 sm8 z 33 a 33 36.70 40.60 5.0 10 150 124.0 53.3 sm8 z 36 a 36 40.00 44.20 5.0 10 150 114.0 58.1 sm8 z 40 a 40 44.40 49.10 5.0 10 150 102.0 64.5 sm8 z 43a 43 47.80 52.80 5.0 10 150 95.1 69.4 note : surge current waveform is defined at 10/1000us waveform electrical characteristics ( @ 25 unless otherwise specified ) ratings and characteristics curves (t a =2 5 unless otherwise noted) figure 1 C power derating curve figure 2 - load dump power characteristics (10 ms exponential waveform)
surface mount transient voltage suppressors revision february 2 , 201 5 3 / 4 @ un semiconductor co., ltd. 2013 specifications are subject to change without notice. please refer to www. unsemi .com .tw for current information. sm8 z series 1 4 to 43 v 6600w un semiconductor co., ltd. www. unsemi .com .tw figure 3 - pulse w a veform figure 4 C reverse power capability package outline dimensions unit: inches (millimeters) recommended mounting pad layout 11.0 9.5 15.8 3.5 3.0 3.3
surface mount transient voltage suppressors revision february 2 , 201 5 4 / 4 @ un semiconductor co., ltd. 2013 specifications are subject to change without notice. please refer to www. unsemi .com .tw for current information. sm8 z series 1 4 to 43 v 6600w un semiconductor co., ltd. www. unsemi .com .tw surface mount tape and reel packaging recommended soldering parameters b min. c 1.5 (0.059) 13.0 0.20 (0.51 0.0008) g max. 26.4 (1.039) t max. 30.4 (1.197) tape size 24 mm (0.945) a max. 330 2.0 (13.0 0.079) 178 2.0 (7.0 0.079) dimensions in millimeters (inches) d min. 20.2 (0.795) n min. 50 (1.97) b d c zone 1 zone1 a n g t 150 w 200 w 60-180 sec <3 w /sec >220 w 255-260 sec 60-150 sec <3 w /sec 10-30 sec <5 w /sec <6 n j o 280 w do not exceed ramp up rate (150-200 w ) reflow liquidus temp. peak temp. time(liq. to peak) ramp up rate (220-200 w ) time within actual peak temp. ramp down rate time(25 w to peak temp.) pre heat temp. min temp. max time(min to max) ir-reflow condition t p t s perheat t s(min) t s(max) t l t l t p ramp-up time(t) temp from 25 c to peak temperature(t)
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