silicon avalanche diodes 254 www.littelfuse.com 400w surface mount transient voltage supressors smaj series features ? rohs compliant ? for surface mounted applications in order to optimize board space low profile package built-in strain relief glass passivated junction low inductance excellent clamping capability repetition rate (duty cycle): 0.01% fast response time: typically less than 1.0ps from 0 volts to v(br) for unidirectional types typical ir less than 1a above 10v high temperature soldering: 250?c/10 seconds at terminals plastic package has underwriters laboratory flammability 94v-o maximum ratings and characteristics @25?c ambient temperature (unless otherwise noted) parameter peak pulse power dissipation on 10/1000? waveform (note 1,2, fig.1) peak pulse current of on 10\1000? waveform (note 1, fig.3) peak forward surge current, 8.3ms single half sine wave superimposed on rated load, (jedec method) (note 2.3) operating junction and storage temperature range value min 400 see table 1 40 -55 to +150 unit watts amps amps ? notes: 1. non-repetitive current pulse, per fig.3 and derated above t a = 25?c per fig.2 2. mounted on 5.0mm 2 (0.03mm thick) copper pads to each terminal 3. 8.3 ms single half sine-wave, or equivalent square wave, duty cycle= 4 pulses per minute maximum. symbol p ppm i ppm i fsm t j, t stg smaj c a voltage bi-directional 5% voltage tolerance tape and reeled (5000 pcs) ordering information agency approvals: recognized under the components program of underwriters laboratories. agency file number: e128662 mechanical specifications: weight: 0.002ounce, 0.061 gram case: jedec do-214ac molded plastic over glass passivated junction mounting position: any polarity: color band denotes cathode except bipolar terminal: solder plated, solderable per mil-std-750, method 2026 standard packaging: 12mm tape (eia std rs-481) rohs
silicon avalanche diodes 255 www.littelfuse.com smaj series 400w surface mount transient voltage supressors part number (uni) part number (bi) device marking code breakdown voltage v br (volts) @ i t maximum reverse leakage i r @ v r (?) maximum clamping voltage v c @ i pp (volts) maximum peak pulse current i pp (a) electrical specification @ tamb 25? smaj5.0a smaj5.0ca ae we 5.0 6.40 7.00 10 9.2 43.5 800 smaj6.0a smaj6.0ca ag wg 6.0 6.67 7.37 10 10.3 38.8 800 smaj6.5a smaj6.5ca ak wk 6.5 7.22 7.98 10 11.2 35.7 500 smaj7.0a smaj7.0ca am wm 7.0 7.78 8.60 10 12.0 33.3 200 smaj7.5a smaj7.5ca ap wp 7.5 8.33 9.21 1 12.9 31.0 100 smaj8.0a smaj8.0ca ar wr 8.0 8.89 9.83 1 13.6 29.4 50 smaj8.5a smaj8.5ca at wt 8.5 9.44 10.40 1 14.4 27.8 20 smaj9.0a smaj9.0ca av wv 9.0 10.00 11.10 1 15.4 26.0 10 smaj10a smaj10ca ax wx 10.0 11.10 12.30 1 17.0 23.5 5 smaj11a smaj11ca az wz 11.0 12.20 13.50 1 18.2 22.0 5 smaj12a smaj12ca be xe 12.0 13.30 14.70 1 19.9 20.1 5 smaj13a smaj13ca bg xg 13.0 14.40 15.90 1 21.5 18.6 5 smaj14a smaj14ca bk xk 14.0 15.60 17.20 1 23.2 17.2 5 smaj15a smaj15ca bm xm 15.0 16.70 18.50 1 24.4 16.4 5 smaj16a smaj16ca bp xp 16.0 17.80 19.70 1 26.0 15.4 5 smaj17a smaj17ca br xr 17.0 18.90 20.90 1 27.6 14.5 5 smaj18a smaj18ca bt xt 18.0 20.00 22.10 1 29.2 13.7 5 smaj20a smaj20ca bv xv 20.0 22.20 24.50 1 32.4 12.3 5 smaj22a smaj22ca bx xy 22.0 24.40 26.90 1 35.5 11.3 5 smaj24a smaj24ca bz xz 24.0 26.70 29.50 1 38.9 10.3 5 smaj26a smaj26ca ce ye 26.0 28.90 31.90 1 42.1 9.5 5 smaj28a smaj28ca cg yg 28.0 31.10 34.40 1 45.4 8.8 5 smaj30a smaj30ca ck yk 30.0 33.30 36.80 1 48.4 8.3 5 smaj33a smaj33ca cm ym 33.0 36.70 40.60 1 53.3 7. 5 5 smaj36a smaj36ca cp yp 36.0 40.00 44.20 1 58.1 6.9 5 smaj40a smaj40ca cr yr 40.0 44.40 49.10 1 64.5 6.2 5 smaj43a smaj43ca ct yt 43.0 47.80 52.80 1 69.4 5.8 5 smaj45a smaj45ca cv yv 45.0 50.00 55.30 1 72.7 5.5 5 smaj48a smaj48ca cx yx 48.0 53.30 58.90 1 77.4 5.2 5 smaj51a smaj51ca cz yz 51.0 56.70 62.70 1 82.4 4.9 5 smaj54a smaj54ca re ze 54.0 60.00 66.30 1 87.1 4.6 5 smaj58a smaj58ca rg zg 58.0 64.40 71.20 1 93.6 4.3 5 smaj60a smaj60ca rk zk 60.0 66.70 73.70 1 96.8 4.1 5 smaj64a smaj64ca rm zm 64.0 71.10 78.60 1 103.0 3.9 5 SMAJ70A smaj70ca rp zp 70.0 77.80 86.00 1 113.0 3.5 5 smaj75a smaj75ca rr zr 75.0 83.30 92.10 1 121.0 3.3 5 smaj78a smaj78ca rt zt 78.0 86.70 95.80 1 126.0 3.2 5 smaj85a smaj85ca rv zv 85.0 94.40 104.00 1 137.0 2.9 5 smaj90a smaj90ca rx zx 90.0 100.00 111.00 1 146.0 2.7 5 smaj100a smaj100ca rz zz 100.0 111.00 123.00 1 162.0 2.5 5 smaj110a smaj110ca se ve 110.0 122.00 135.00 1 177.0 2.3 5 smaj120a smaj120ca sg vg 120.0 133.00 147.00 1 193.0 2.1 5 smaj130a smaj130ca sk vk 130.0 144.00 159.00 1 209.0 1.9 5 smaj150a smaj150ca sm vm 150.0 167.00 185.00 1 243.0 1.6 5 smaj160a smaj160ca sp vp 160.0 178.00 197.00 1 259.0 1.5 5 smaj170a smaj170ca sr vr 170.0 189.00 209.00 1 275.0 1.5 5 smaj180a smaj180ca st vt 180.0 201.00 222.00 1 292.0 1.4 5 smaj200a smaj200ca sv vv 200.0 224.00 247.00 1 324.0 1.2 5 smaj220a smaj220ca sx vx 220.0 246.00 272.00 1 356.0 1.1 5 smaj250a smaj250ca sz vz 250.0 279.00 309.00 1 405.0 1.0 5 smaj300a smaj300ca te ue 300.0 335.00 371.00 1 486.0 0.8 5 smaj350a smaj350ca tg ug 350.0 391.00 432.00 1 567.0 0.7 5 smaj400a smaj400ca tk uk 400.0 447.00 494.00 1 648.0 0.6 5 smaj440a smaj440ca tm um 440.0 492.00 543.00 1 713.0 0.6 5 reverse stand off voltage v r (volts) uni bi min max for bidirectional type having vrwm of 10 volts and less, the ir limit is double. for parts without a (vbr is 10%). test current i t (ma) rohs 6 silicon diode arrays
silicon avalanche diodes 256 www.littelfuse.com 400w surface mount transient voltage supressors smaj series ratings and characteristic curves t a =25?c unless otherwise noted fig. 1 peak pulse power rating fig. 3 pulse waveform fig. 5- typ. transient thermal impedance fig. 6- maximum non-repetitive peak fig. 4- typical junction capacitance fig. 2 pulse derating curve t d - pulse width (sec.) t a - ambient temperature ( ? c) p ppm - peak pulse power (kw) i ppm - peak pulse current, % i rsm transient thermal impedance ( ? c/w) i psm -peak forward surge current (a) c j -junction capacitance (pf) peak pulse power (p pp ) or current (i pp ) derating in percentage, % 0.1s 1.0s 10s 100s 1.0ms 10ms 0.1 1 10 100 0.2x0.2"(5.0x5.0mm) copper pad areas 0 0 0 0.1 1.0 10 100 50 100 150 1.0 2.0 3.0 4.0 0.001 0.01 0.1 1 10 100 1000 1 10 100 200 20000 10000 1000 100 10 1.0 10 100 200 10 100 0 25 25 50 50 75 75 100 100 125 150 175 200 t p - pulse duration(sec) number of cycles at 60hz v wm -reverse stand-off voltage (v) forward surge current t r =10sec peak value i ppm half value i ppm 2 t j =25 ? c pulse width(td) is defined as the point where the peak current decays to 50% of i ppm 10/1000sec. waveform as defined by r.e.a t d t j =t j max 8.3 single half sine-wave (jedec method) undirectional only uni-directional bi-directional t j =25 ? c f=1.0mhz v sig =50mvp-p v r , measured at stand-off voltage, v wm non-repetitive pulse waveform shown in fig.3 t a = 25 ? c uni-directional bi-directional rohs
silicon avalanche diodes 257 www.littelfuse.com smaj series 400w surface mount transient voltage supressors
!" ! # rohs package outline dimensions and pad layouts 6 silicon diode arrays
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