109 www.littelfuse.com varistor products 2 varistor products high energy industrial dhb34 varistor series the dhb34 series of transient surge suppressors are industrial high- energy metal-oxide varistors (movs). they are designed to provide surge suppression in the ac mains outdoor and service entrance environment (distribution panels) of buildings. dhb34 applications also include industrial heavy motors, controls, and power supplies such as used in the oil-drilling, mining, and transportation fields, including hvac and motor/generator applications. the dhb34 series provides rigid terminals for through-hole solder mounting on printed circuit boards, thereby eliminating the need for screw mounting. see ratings and specifications table for part numbers. features ?wide operating voltage range v m(ac)rms ................................... 110v to 750v ?high energy absorption capability ...............................w tm = 220j to 1050j ?high peak pulse current capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i tm = 40,000a* ?rigid terminals for secure through-hole solder mounting ?no derating up to 85 o c ambient agency approvals: recognized under the components program of underwriters laboratories. certified by csa. agency file numbers: ul 1449, e75961, ul1414, e56529, csa lr91788. * note: ratings are for each individual varistor element in a dual assembly. new
110 www.littelfuse.com varistor products high energy industrial dhb34 varistor series absolute maximum ratings for ratings of individual members of a series, see device ratings and specifications chart continuous: steady state applied voltage: ac voltage range (v m(ac)rms ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 to 750 v dc voltage range (v m(dc) ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 to 970 v transient: peak pulse current (i tm ) for 8/20? current wave (see figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,000 a single pulse energy range for 2ms current square wave (w tm ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 to 1050 j operating ambient temperature range (t a ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 o c storage temperature range (t stg ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 o c temperature coefficient ( v) of clamping voltage (v c ) at specified test current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 %/ o c caution: stresses above those listed in ?bsolute 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 specification is not implied. device ratings and specifications dhb34 series units note: ratings are for each individual varistor element in dual assembly. 1. average power dissipation of transients not to exceed 2.0w per varistor element (2 varistors per device). 2. 40ka capability depends on applications rated up to 115v . 30ka applies if > 115 v . 3. 40ka capability depends on applications rated up to 123v . 30ka applies if > 123 v . 4. 40ka capability depends on applications rated up to 132v . 30ka applies if > 132 v . 5. 40ka capability depends on applications rated up to 97v rms . 30ka applies if > 97 v rms . rms rms rms rms rms rms model number size maximum ratings (85 o c) specifications (25 o c) continuous transient varistor voltage at 1ma dc test current maximum clamping voltage (v c ) at 200a (8/20 s) typical capaci- tance v rms v dc energy (2ms) peak current (8/20 s) v m(ac) v m(dc) w tm i tm min v n(dc) max v c f = 1mhz (mm) (v) (v) (v) (a) (v) (v) (v) (v) (pf) 40,000 v131dhb34 v141dhb34 34 34 130 140 175 188 270 291 40,000 184 198 200 220 228 248 345 375 10,000 v151dhb34 34 150 200 300 212 240 268 405 8,000 9,000 v251dhb34 34 250 330 370 354 390 429 650 5,000 v271dhb34 34 275 369 400 40,000 389 430 473 730 4,500 v321dhb34 34 320 420 460 40,000 462 510 561 830 3,800 v331dhb34 34 330 435 475 40,000 467 519 570 843 3,750 v351dhb34 34 350 460 500 40,000 495 550 604 894 3,600 2 V111DHB34 34 110 148 220 40,000 156 173 190 288 11,600 1 40,000 3 40,000 4 v181dhb34 34 180 240 330 254 282 310 468 6,800 40,000 v201dhb34 34 200 265 350 283 314 345 533 6,350 40,000 v301dhb34 34 300 410 430 40,000 433 478 526 780 4,100
111 www.littelfuse.com varistor products 2 varistor products high energy industrial dhb34 varistor series note: ratings are for each individual varistor element in dual assembly. 1. average power dissipation of transients not to exceed 2.0w per varistor element (2 varistors per device). 2. 40ka capability depends on applications rated up to 115v . 30ka applies if > 115 v . 3. 40ka capability depends on applications rated up to 123v . 30ka applies if > 123 v . 4. 40ka capability depends on applications rated up to 132v . 30ka applies if > 132 v . 5. 40ka ca p abilit y de p ends on a pp lications rated u p to 97v rms . 30ka a pp lies if > 97 v rms . rms rms rms rms rms rms model number size maximum ratings (85 o c) specifications (25 o c) continuous transient varistor voltage at 1ma dc test current maximum clamping voltage (v c ) at 200a (8/20 s) typical capaci- tance v rms v dc energy (2ms) peak current (8/20 s) v m(ac) v m(dc) w tm i tm min v n(dc) max v c f = 1mhz (mm) (v) (v) (v) (a) (v) (v) (v) (v) (pf) v421dhb34 34 420 560 600 40,000 610 680 748 1,130 3,000 v441dhb34 34 440 585 630 40,000 622 691 759 1,147 2,900 v391dhb34 34 385 510 550 40,000 545 604 663 1,000 3,500 v481dhb34 34 480 640 650 40,000 670 750 825 1,240 2,700 v511dhb34 34 510 675 700 40,000 735 820 910 1,350 2,500 v551dhb34 34 550 710 755 40,000 778 864 949 1,404 2,390 v571dhb34 34 575 730 770 40,000 805 910 1000 1,480 2,200 v661dhb34 34 660 850 900 40,000 940 1050 1160 1,720 2,000 v681dhb34 34 680 875 925 40,000 962 1068 1173 1,777 1,900 v751dhb34 34 750 970 1050 40,000 1080 1200 1320 2,000 1,800 device ratings and specifications
112 www.littelfuse.com varistor products high energy industrial power dissipation ratings should transients occur in rapid succession, the average power dissipation result is simply the energy (watt-seconds) per pulse times the number of pulses per second. the power so developed must be within the specifications shown on the device ratings and specifications table for the specific device. the operating values must be derated as shown in figure 1. transient v-i characteristics curves figure 2. peak pulse current test waveform 100 90 50 10 o 1 t t 1 t 2 time percent of peak value o 1 = virtual origin of wave t = time from 10% to 90% of peak t 1 = virtual front time = 1.25 ?t t 2 = virtual time to half value (impulse duration) example: for an 8/20 s current waveform: 8 s = t 1 = virtual front time 20 s = t 2 = virtual time to half value 1000 10000 0.001 0.01 0.1 1 10 100 10000 10000 0 maximum clamping voltage dhb34 series 110 to 750v ac rating ta = -55 c to 85c current - amps voltage volts v751 v681 v661 v571 v551 v511 v391 v351 v331 v321 v271 v251 v201 v181 v151 v141 v111 v131 v301 v481 v441 v421 100 1000 dhb34 varistor series figure 3. clamping voltage for dhb34 series
113 www.littelfuse.com varistor products 2 varistor products high energy industrial dhb34 varistor series figure 4. surge current rating curves for v131dhb34 - v751dhb34 disc size 34mm v131dhb34 - v751dhb34 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) 10 1 indefinite 10 5 10 2 2 10 3 10 4 10 6 note: if pulse ratings are exceeded, a shift of v n(dc) (at specified current) of more than ?0% 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 pub- lished specifications, but it does not prevent the device from continuing to function, and to provide ample protection. pulse rating curves dia 3.81 +/- 0.08 7.06 +/- 0.2 0.51 typ 12.7 typ 3.7 typ 56 max s2 s1 t max 25.4 +/- 0.5 37.5 max table of dimensions - thickness and terminal offsets type t max s1 +/- 1.15 mm v131dhb34 7.8 v141dhb34 8.2 v151dhb34 8.8 v251dhb34 7.8 v271dhb34 8.7 v301dhb34 8.9 v321dhb34 9.3 v421dhb34 11.3 v481dhb34 12.2 v511dhb34 13.4 v571dhb34 v661dhb34 v751dhb34 14.8 s2 +/- 2.30mm 5.70 2.85 V111DHB34 7.6 5.50 2.65 6.00 3.00 6.30 3.15 6.00 3.00 v181dhb34 9.0 6.50 3.25 v201dhb34 9.2 6.70 3.35 6.50 3.25 7.00 3.50 7.24 3.66 v331dhb34 9.5 7.40 3.70 9.00 4.50 v441dhb34 11.5 9.10 4.55 v391dhb34 11.2 8.90 4.45 v351dhb34 10.5 8.20 4.10 9.60 4.80 10.50 5.25 v551dhb34 14.6 11.40 5.70 11.60 5.80 13.30 6.65 17.20 v681dhb34 14.00 7.00 17.5 14.70 7.35 18.20 varistor designator max ac rms working voltage (first significant digits) v m(ac) disc size (mm) series designator v m(ac) voltage decade multiplier v 13 1dhb 34 ordering information mechanical dimensions terminals configuration: terminals a & b are connected to one varistor element. terminals b & c connected to second varistor element. terminal materials: tin plated over copper.
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