ds30213 rev. c-2 1 of 2 smat70a/smbt70a smat70a/smbt70a 400w, 600w surface mount transient voltage suppressor maximum ratings @ t a = 25c unless otherwise specified characteristic symbol smat70a smbt70a unit peak pulse power dissipation (non repetitive current pulse derated above t a =25 c) p pk 400 600 w peak forward surge current, 8.3ms single half sine wave superimposed on rated load (jedec method) (note 2) i fsm 40 100 a instantaneous forward voltage @ i pp = 35a (note 2) v f 3.5 v operating and storage temperature range t j ,t stg -55 to +150 c features case: sma, smb transfer molded epoxy terminals: solderable per mil-std-202, method 208 polarity indicator: cathode band marking: date code and marking code weight: sma 0.064 grams smb 0.093 grams 400, 600w peak pulse power dissipation 70v standoff voltage 100v maximum clamping voltage - a requirement of many -48v backplane telecom applications glass passivated die construction fast response time: typically less than 1 ps plastic material - ul flammability classification rating 94v-0 mechanical data a b c d g h e j part number reverse standoff voltage breakdown voltage v br @ i t (note 3) test current max. reverse leakage @ v rwm max. clamping voltage @ i pp max. peak pulse current i pp typical junction capacitance (note 4) typical voltage temp. variation of v br marking code v rwm (v) min (v) max (v) i t (ma) i r ( a) v c (v) (a) (pf) mv/ c smat70a 70 77.8 89.5 1.0 5.0 100 3.5 55 80 kex smbt70a 70 77.8 89.5 1.0 5.0 100 5.3 80 80 npx notes: 1. measured with 8.3ms single half sine-wave. duty cycle = 4 pulses per minute maximum. 2. v br measured with i t current pulse = 300 s. 3. f = 1mhz, v r = 0vdc. smat70a smbt70a package sma smb dim min max min max a 2.29 2.92 3.30 3.94 b 4.00 4.60 4.06 4.57 c 1.27 1.63 1.96 2.21 d 0.15 0.31 0.15 0.31 e 4.80 5.59 5.00 5.59 g 0.10 0.20 0.10 0.20 h 0.76 1.52 0.76 1.52 j 2.01 2.62 2.00 2.62 sma, smb new product @t a = 25c unless otherwise specified electrical characteristics
ds30213 rev. c-2 2 of 2 smat70a/smbt70a 0.1 1.0 t pulse width ( s) fi g . 2 pulse ratin g curve p 0.1 10 100 1.0 10 1000 10000 t = 25 c j smbt70a smat70a p , peak pulse power (kw) d 100 non repetitive pulse waveform shown in fig. 3 012 3 100 50 0 i , peak pulse current (%i ) ppp t = 10 s r peak value i pp half value i /2 pp 10 x 1000 waveform as defined by r.e.a. t p t, time (ms) fi g . 3 pulse waveform 10 x 1000 waveform as defined by rea 0 25 50 75 100 125 150 175 200 100 75 50 25 0 t , ambient temperature ( c) fi g . 1 pulse deratin g curve a peak pulse dera ting in % of peak power or current new product
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