177 varistor products revision: september 3, 2009 ?2009 littelfuse, inc. ca varistor series high energy industrial disc varistors > ca series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ca.html for current information. hiCenergy movs ca series ca varistor series description the ca series of transient surge suppressors are industrial high-energy disc varistors (movs) intended for special applications requiring unique electrical contact or packaging methods provided by the customer. the electrode ?nish of these devices is solderable and can also be used with pressure contacts. discs of the same diameter may be stacked. this series of industrial disc varistors are nominal 60mm diameter, with disc thickness ranging from 2.0mm minimum to 32mm maximum. the voltage range is 250v to 2800 v (ac)rms . for information on soldering considerations, refer to ec637 "recommendations for soldering terminal leads to mov varistor discs." features t 4 u b o e b s e e j t d t j [ f nominal 60mm diameter t % j t d t i b w f f e h f passivation insulation t ) j h i q f b l q v m t f current range 50000a to 70000a t 7 f s z i j h i o f o f s h z capability w tm 880j to 1 0000j absolute maximum ratings caution: stresses above those listed in "absolute maximum ratings" may cause permanent damage to the device. this is a stress only ratin g and operation of the device at these or any other conditions above those indicated in the operational sections of this speci?cation is not im plied. continuous ca series units steady state applied voltage: ac voltage range (v m(ac)rms ) 250 to 2800 v dc voltage range (v m(dc) ) 330 to 3500 v transient: peak pulse current (i tm ) for 8/20 s current wave(see figure 2) 20,000 to 70,000 a single-pulse energy range for 2ms current square wave (w tm ) 880 to 10,000 j operating ambient temperature range (t a ) -55 to +85 c storage temperature range (t stg ) - 55 to +85 c temperature coefficient (v) of clamping voltage (v c ) at specified test current <0.01 %/c t ' p s s b u j o h t p g j o e j w j e v b m n f n c f s t p g b t f s j f t
t f f % f w j d f 3 b u j o h t b o e 4 q f d j m d b u j p o t d i b s u
178 varistor products ?2009 littelfuse, inc. revision: september 3, 2009 ca varistor series high energy industrial disc varistors > ca series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ca.html for current information. ca series ratings & speci?cations part number device branding size maximum rating (85c) speci?cations (25c) continuous transient varistor voltage at 1ma dc test current max clamping volt vc at 200a current (8/20 s) typical capacitance v rms v dc energy (2ms) peak current (8/20 s) v m(ac) v m(dc) w tm i tm min v nom max v c f = 1mhz (mm) (v) (v) (j) (a) (v) (v) (v) (a) (pf) V251CA60 60 250 330 880 5 0000 354 390 429 620 10000 v271ca60 60 275 369 950 5 0000 389 430 473 680 9000 v321ca60 60 320 420 1100 5 0000 462 510 561 760 7500 v421ca60 60 420 560 1500 7 0000 610 680 748 1060 6000 v481ca60 60 480 640 1600 7 0000 670 750 825 1160 5500 v511ca60 60 510 675 1800 7 0000 735 820 910 1300 5000 v571ca60 60 575 730 2100 7 0000 805 910 1000 1420 4500 v661ca60 60 660 850 2300 7 0000 940 1050 1160 1640 4000 v751ca60 60 750 970 2600 7 0000 1080 1200 1320 1880 3500 v881ca60 60 880 1150 3200 7 0000 1290 1500 1650 2340 2700 v112ca60 v142ca60 v172ca60 v202ca60 v242ca60 v282ca60 60 60 60 60 60 60 110 0 1400 1700 2000 2400 2800 1400 1750 2150 2500 3000 3500 3800 5000 6000 7500 8800 10000 70000 70000 70000 70000 70000 70000 1620 2020 2500 2970 3510 4230 1800 2200 2700 3300 3900 4700 2060 2550 3030 3630 4290 5170 2940 3600 4300 5200 6200 74 0 0 2200 1800 1500 1200 1000 800 note: average power dissipation of transients should not exceed 2.5w for ca60 discs. should transients occur in rapid succession, the average power dissipation result is 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 in 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 50 10 o 1 t t 1 t 2 time 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 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 ambient temperature ( o c) percent of rated value figure 1 figure 2
179 varistor products revision: september 3, 2009 ?2009 littelfuse, inc. ca varistor series high energy industrial disc varistors > ca series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ca.html for current information. hiCenergy movs ca series max clamping voltage disc size 60mm 250 to 880v m(ac) rating t a = -55 o c to 85 o c 6,000 5,000 4,000 3,000 2,000 1,000 900 800 700 600 500 400 300 200 10 -2 10 -1 10 0 10 1 10 2 10 3 10 4 10 5 peak amperes (a) v881ca60 v751ca60 v661ca60 v571ca60 maximum peak volts (v) v511ca60 v481ca60 v421ca60 v321ca60 v271ca60 V251CA60 maximum clamping voltage for 60mm parts v112ca60 - v282ca60 30,000 20,000 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 10 -2 10 -1 10 0 10 1 10 2 10 3 10 4 10 5 peak amperes (a) max peak volts (v) v282ca60 v242ca60 v202ca60 v172ca60 v142ca60 v112ca60 max clamping voltage disc size 60mm 1100 to 2800v m(ac) rating t a = -55 o c to 85 o c V251CA60 - v881ca60 repetitive surge capability for 60mm parts V251CA60 - v321ca60 50,000 20,000 10,000 5,000 2,000 1,000 500 200 100 50 20 10 impulse duration ( s) 1,000 10,000 10 10 2 10 3 indefinite 10 6 20 100 2 disc size 60mm V251CA60 - v321ca60 1 surge current (a) 10 5 10 4 v421ca60 - v282ca60 100,000 50,000 20,000 10,000 5,000 2,000 1,000 500 200 100 50 20 10 20 100 1,000 10,000 impulse duration ( s) 10 10 2 10 3 10 6 2 1 disc size 60mm v421ca60 - v282ca60 indefinite surge current (a) 10 4 10 5 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 does not prevent the device from continuing to function, and to provide ample protection. figure 3 figure 4 figure 5 figure 6
180 varistor products ?2009 littelfuse, inc. revision: september 3, 2009 ca varistor series high energy industrial disc varistors > ca series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ca.html for current information. operating/storage temperature -55c to +85c humidity aging ? $
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i p v s t +/-10% typical voltage change thermal shock +85c to -55c 10 times +/-10% typical voltage change solvent resistance . * - o 4 5 % o
. f u i p e ' moisture sensitivity - f w f m
+ o 4 5 % o $ soldering characteristics 4 p m e f s b c j m j u z q f s . * - o 4 5 % o
method 208e insulating material glass passivation on edge only device labeling none physical speci?cations environmental speci?cations product dimensions (mm) 2.5 mm 0.1 inch diameter (see table) passivation collar electrode thickness electrode optional model size disc diameter millimeters inches min max min max 60 58.0 62.0 2.283 2.441 model v rms v m(ac) disc thickness millmeters inches min. max. min. max. 250 2.0 2.7 0.079 0.106 275 2.2 3.0 0.087 0.118 320 2.6 3.5 0.102 0.138 420 3.5 4.7 0.138 0.185 510 4.2 5.7 0.165 0.224 575 4.6 6.3 0.181 0.248 660 5.3 7.2 0.209 0.283 750 6.1 8.3 0.240 0.327 880 7.3 10.3 0.287 0.406 1100 9.2 13.0 0.362 0.512 1400 11.5 16.0 0.453 0.630 1700 14.0 19.0 0.551 0.748 2000 17.0 22.5 0.669 0.886 2400 20.0 27.0 0.787 1.063 2800 24.0 32.0 0.945 1.260 model number typical discweight (grams) V251CA60 39 v271ca60 42 v321ca60 50 v421ca60 66 v481ca60 71 v511ca60 80 v571ca60 88 v661ca60 101 v751ca60 116 v881ca60 141 v112ca60 178 v142ca60 220 v172ca60 265 v202ca60 317 v242ca60 377 v282ca60 450 weight
181 varistor products revision: september 3, 2009 ?2009 littelfuse, inc. ca varistor series high energy industrial disc varistors > ca series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ca.html for current information. hiCenergy movs ca series passivation layer the standard ca series is supplied with passivation layer around the outside perimeter of the disc forming an electrical insulator as detailed in the dimensional drawing. for other options contact factory. (see ordering information) encapsulated recommendations after lead attachment, the disc/lead assembly may be coated or encapsulated in a package to provide electrical insulation and isolation from environmental contamination as required by the application. coating/filler materials for containers may include silicones, polyurethanes, and some epoxy resins. materials containing halogens, sul?des, or alkalines are not recommended. electrode metallization ca60 discs are supplied as standard with sintered silver electrodes. for other available options please contact littelfuse. stacking and contact pressure recommendations when applications require the stacking of ca60 discs, or when an electrical connection is made by pressure contacts, the pressure applied to the ca60 disc electrode surface should be minimum 2.2kgs (5 pounds) and maximum 4n/cm 2 (5.7lbs/in 2 ). part numbering system varistor designator max ac rms working voltage (first significant digits) v m(ac) disc size (mm) diameter series designator v m(ac) voltage decade multiplier v 25 1 ca 60 packaging and shipping the ca series is supplied in bulk for shipment. discs are q b d l b h f e j o d p n q b s u n f o u b m j [ f e d b s u p o t u p q s p u f d u g s p n scratching or edge-chipping during shipment. no branding or any other type of marking appears on the ca disc itself. ca60 discs are supplied as standard with sintered silver electrodes and glass passivation. for other available options please contact factory. temperature ( o c) 250 200 150 100 50 0 0 100 200 300 400 500 600 700 800 900 time (sec) recommended re?ow temperature pro?le
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