varistor products revision: october 29, 2009 ?2009 littelfuse, inc. da/db varistor series industrial high energy terminal varistors > da/db series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/da or /db.html for current information. hiCenergy movs da/db series da/db varistor series description the da and db series transient surge suppressors are heavy-duty industrial metal-oxide varistors (movs) designed to provide surge protection for motor controls and power supplies used in oil- drilling, mining, and transportation equipment. these ul recognized varistors have identical ratings and speci?cations but differ in case construction to provide ?exibility in equipment designs. da series devices feature rigid terminals to ensure secure wire contacts. both the da and db series feature improved creep and strike distance capability to minimize breakdown along the package surface design that provides complete electrical isolation of the disc subassembly. see da/db series device ratings and speci?cations table for part number and brand information. features ? rohs compliant and leadCfree ? high energy absorption capability w tm up to 1050j ? wide operating voltage range v m(ac)rms 130v to 750v ? screw terminals (da series),quick connect push-on connectors (db series) ? case design provides complete electrical isolation of disc subassembly ? 40mm diameter disc ? no derating up to 85oc ambient agency approvals absolute maximum ratings ? for ratings of individual members of a series, see device ratings and speci?cations chart agency agency file number e320116 caution: stresses above those listed in "absolute maximum ratings" may cause permanent damage to the device. this is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this speci?cation is not implied. continuous da/db series units steady state applied voltage: ac voltage range (v m(ac)rms ) 130 to 750 v dc voltage range (v m(dc) ) 175 to 970 v transients: peak pulse current (i tm ) for 8/20 s current wave (see figure 2) 40,000 a single pulse energy range for 2ms current squar ewave (w tm ) 270 to 1050 j operating ambient temperature range (t a ) -55 to +85 oc storage temperature range (t stg ) -55 to +125 oc temperature coef?cient (a v ) of clamping voltage (v c ) at speci?ed test current <0.01 %/oc hi-pot encapsulation (coating isolation voltage capability) (dielectric must withstand indicated dc voltage for one minute per mil-std 202, method 301) 5000 v coating insulation resistance 1000 m rohs da series db series
varistor products ?2009 littelfuse, inc. revision: october 29, 2009 da/db varistor series industrial high energy terminal varistors > da/db series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/da or /db.html for current information. note : average power dissipation of transients not to exceed 2.0w. da/db series ratings & speci?cations part number device branding maximum rating (85oc) speci?cations (25oc) continuous transient varistor voltage at 1ma dc test current maximum clamping volt v c at 200a current (8/20 s) typical capaci- tance f = 1mhz v rms v dc energy (2ms) peak current 8 x 20 s v m(ac) v m(dc) w tm i tm min v nom max v c c da db (v) (v) (j) (a) (v) (v) (v) (a) (pf) V131DA40 v131db40 130 175 270 4 0000 1 184 200 228 345 10000 v151da40 v151db40 150 200 300 4 0000 2 212 240 268 405 8000 v251da40 v251db40 250 330 370 4 0000 354 390 429 650 5000 v271da40 v271db40 275 369 400 4 0000 389 430 473 730 4500 v321da40 v321db40 320 420 460 4 0000 462 510 561 830 3800 v421da40 v421db40 420 560 600 4 0000 610 680 748 1130 3000 v481da40 v481db40 480 640 650 4 0000 670 750 825 1240 2700 v511da40 v511db40 510 675 700 4 0000 735 820 910 1350 2500 v571da40 v571db40 575 730 770 4 0000 805 910 1000 1480 2200 v661da40 v661db40 660 850 900 4 0000 940 1050 1160 1720 2000 v751da40 v751db40 750 970 1050 4 0000 1080 1200 1320 2000 1800 should transients occur in rapid succession, the average power dissipation required is simply the energy (watt- seconds) per pulse times the number of pulses per second. the power so developed must be within the speci?cations shown on the device ratings and speci?cations table for the speci?c device. furthermore, the operating values need to be derated at high temperatures as shown above. because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. power dissipation ratings 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 15 percent of rated value ambient temperature ( o c) 100 90 50 10 o 1 t t 1 t 2 time percent of peak value peak pulse current test waveform 0 1 = virtual origin of wave t = time from 10% to 90% of peak t 1 = rise time = 1.25 x t t 2 = decay time example - for an 8/20 s current waveform: 8 s = t 1 = rise time 20 s = t 2 = decay time notes: 1. peak current applies to applications rated up to 115vrms. peak current is 30ka for applications greater than 115v. 2. peak current applies to applications rated up to 132vrms. peak current is 30ka for applications greater than 132v. figure 1 figure 2
varistor products revision: october 29, 2009 ?2009 littelfuse, inc. da/db varistor series industrial high energy terminal varistors > da/db series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/da or /db.html for current information. hiCenergy movs da/db series repetitive surge capability maximum clamping voltage V131DA40 - v751da40 and v131db40 - v751db40 200 6,000 5,000 4,000 3,000 1,000 900 800 700 600 500 400 300 10 -2 10 -1 10 0 10 1 10 2 10 3 10 4 10 5 maximum clamping voltage disc size 40mm 130 to 750 vm(ac) rating t a = -55 o c to 85 o c v421da/db40 v151da/db40 v751da/db40 maximum peak volts (v) peak amperes (a) v131da/db40 v321da/db40 v271da/db40 v251da/db40 v511da/db40 v481da/db40 v571da/db40 v661da/db40 2,000 operating/storage temperature -55c to +85c/ -55c to +125c humidity aging +85c, 85% rh, 1000 hours +/- 5% typical resistance change thermal shock +85c to -40c 10 times +/- 5% typical resistance change solvent resistance milCstdC202, method 215f moisture sensitivity level 1, jCstdC020c lead material da - copper, tinCplated db - brass, tinCplated insulating material cured, ?ame retardant epoxy polymer meets ul94vC0 requirements. device labeling marked with lf, part number and date code physical speci?cations environmental speci?cations note: if pulse ratings are exceeded, a shift of v n(dc) (at speci?ed current) of more than +/-10% could result. this type of shift, which normally results in a decrease of v n(dc) , may result in the device not meeting the original published speci?cations, but it does not prevent the device from continuing to function, and to provide ample protection. V131DA40 - v751da40 and v131db40 - v751db40 figure 3 figure 4 disc size 40mm V131DA40 - v751da40 50,000 20,000 10,000 5,000 2,000 1,000 500 200 100 50 20 10 20 100 1,000 10,000 surge current (a) impulse duration ( s) v131db40 - v751db40 2 1 indefinite 10 4 10 3 10 2 10 5 10 6 10
varistor products ?2009 littelfuse, inc. revision: october 29, 2009 da/db varistor series industrial high energy terminal varistors > da/db series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/da or /db.html for current information. product dimensions (mm) da series dimensions in millimeters and (inches). a 4.3mm (0.170) 15mm (0.59) a dimension: filister head screw - 51mm (2.01) pan head screw - 53mm (2.09) 23mm 1mm (0.90 0.04) 57mm (2.24) 67mm (2.64) 62mm (2.44) m4 international thread 4.5mm (0.18) db series 60.3 (2.37) 44.45 0.75 (1.75 0.03) 46.8 (1.84) 25.4 0.75 (1.00 0.03) all dimensions are maximum except where noted holes 0.23 thru bore 0.370 x 0.370 dp 12.7 (0.50) 6.60 (0.26) 2 holes 6.60 (0.26) 41 (1.61) 40.5 (1.6) 1. 6 (0.06) 23 (0.90) 12.7 (0.50) part numbering system varistor v m(ac) first t wo signi?cant digits* v m(ac) v m(ac) v m(ac) decade multiplier* *refer to rating & speci?cations table example: 13 0 v m(ac) = 13 1 disc size (60mm) series designator da or db v xx x da 4 0
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