95 www.littelfuse.com 2 varistor products varistor products high energy industrial thermally protected tmov34s varistor series the littelfuse industrial tmov34s series thermally protected varistor represents a new development in circuit protection. it consists of a 34mm square format varistor element ( mov) with an integral thermally activated element designed to open in the event of overheating due to abnormal over-voltage, limited current conditions as outlined in ul1449 feb. 1998 edition.the device has a third lead, an indicator lead, which may be used to indicate that the mov has been disconnected from the circuit. this lead facilitates connection to monitoring circuitry. the tmov34s devices offer quick thermal response due to the close proximity of the integrated ther- mal element to the mov body. the integrated configuration also offers lower inductance than most discreet solutions resulting in improved clamping performance to fast over-voltage transients. features ?us patent for thermally protected mov- patent # 6636403 ?designed to facilitate compliance to ul1449 for tvss product. ?hi peak current rating to 40 ka. ?-55 deg c to +85 deg c operating temp. ?agency recognition : ul ?alternative design available with narrow 3mm wide monitor (right) lead. agency approvals: recognized by ul under file ul e75901 34mm devices- devices are approved as an mov to ul1449. devices with ratings greater than 420vac are not affected by these abnormal voltage con- ditions. accelerated aging testing- 34mm devices comply with acclerated aging test requirements per. ansi/ieee c62.11 and may be used in secondary surge arrestors. agency file numbers: ule75961 (ul1449) applications ?tvss products ?ac panel protection modules ?ac line power supplies ?ac power meters ?ups (uninterruptable power supply) ?inverters ?ac/dc power supplies ?din rail
96 www.littelfuse.com varistor products high energy industrial thermally protected tmov34s varistor series maximum rating (85 c) specifications (25 c) continuous transient ac dc volts volts energy 2ms peak surge current 8/20 s varistor voltage at 1ma test current maximum clamping voltage 8/20 s at 200a typical capacitance f = 1mhz v m(ac)rms vm(ac)rms vm(ac) v n(dc) min v n(dc) max v c c part number (v) (j) (v) (v) (pf) mcov surge arrester (v) i tm 1 x pulse wtm 1 x pulse (a) tmov34s111m 115 150 98 235 40000 1 163 202 305 11500 tmov34s131m 130 175 111 270 40000 2 184 228 345 10000 tmov34s141m 140 188 119 291 40000 3 198 248 375 9000 tmov34s151m 150 200 128 300 40000 4 212 268 405 8000 tmov34s181m 180 240 153 330 40000 5 254 312 488 6800 tmov34s201m 200 265 170 335 40000 283 357 540 6500 tmov34s251m 250 330 213 370 40000 354 429 650 5000 tmov34s271m 275 369 234 400 40000 389 473 730 4500 tmov34s301m 300 400 255 435 40000 433 528 780 4050 tmov34s321m 320 420 272 460 40000 462 561 830 3800 tmov34s331m 330 435 281 475 40000 476 581 855 3700 tmov34s351m 350 460 298 500 40000 505 616 910 3500 tmov34s391m 385 506 327 550 40000 555 678 1005 3300 tmov34s421m 6 420 560 357 600 40000 610 748 1130 3000 TMOV34S461M 6 460 610 391 620 40000 642 783 1188 2800 tmov34s481m 6 480 640 408 650 40000 670 825 1240 2700 tmov34s511m 6 510 675 434 700 40000 735 910 1350 2500 tmov34s551m 6 550 700 468 735 40000 770 939 1415 2250 tmov34s571m 6 575 730 489 770 40000 805 1000 1480 2200 tmov34s621m 6 620 800 527 840 40000 880 1074 1589 2100 tmov34s661m 6 660 850 561 900 40000 940 1160 1720 2000 tmov34s681m 6 680 890 578 950 40000 980 1195 1772 1970 tmov34s751m 6 750 970 638 1050 40000 1080 1320 2000 1800 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 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 to 750 v transient: peak pulse current (i tm ) for 8x20? current wave, single pulse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40,000 a single-pulse energy capability for 2ms current wave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 to 1050 j operating ambient temperature range (t a ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +85 ?c storage temperature (t stg ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125 o c temperature coefficient ( v) of clamping voltage (v c ) at specified test current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 %/ o c hi-pot encapsulation (isolation voltage capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 v thermal protection isolation voltage capability (when operated) -under ul1449 limited current test procedure-see note #1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 v insulation resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000 m ? i #1 - under ul1449 limited current testing parts rated >420v will not open due to 600v voltage limit. devices with ratings >420v have not yet been evaluated. 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 - tmov varistor series absolute maximum ratings units
97 www.littelfuse.com 2 varistor products varistor products high energy industrial thermally protected tmov34s varistor series * figure 4 : typical time to open circuit under ul1449 abnormal overvoltage limited current test 0.1 1 10 10 100 1000 10000 time s 0.125a 0.5a 2.5a 5a typical for applications exceeding 85? ambient temperature, the peak surge current and energy ratings must be reduced as shown in figure 3. figure 5 : peak current & energy derating curve 0 20 40 60 80 100 -55 50 60 70 80 90 100 110 120 130 ambient temperature (?) percent of rated valu e thermal characteristics note : the industrial tmov series tmov34s devices are intended, in conjunction with appropriate enclosure design, to help facilitate tvss module compliance to ul 1449, section 37.4 (abnormal over-voltage lim- ited current requirements). under these extreme abnormal over-voltage conditions, the units will exhibit substantial heating and potential venting prior to opening. modules should be designed to contain this possibility. application testing is strongly recommended. pulse rating curves figure 6. surge current rating curves for hb34, hf34 and hg34 hx34 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 (?) 10 1 indefinite 10 5 10 2 2 10 3 10 4 10 6
98 www.littelfuse.com varistor products high energy industrial thermally protected tmov34s varistor series transient v-i characteristic curves 1000 10000 0.001 0.01 0.1 1 10 100 10000 10000 0 tmov34s 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 fig 7. v-i characteristic curves for tmov34s varistor
99 www.littelfuse.com 2 varistor products varistor products high energy industrial thermally protected tmov34s varistor series r led line fuse tmov34s neutral line to protected circuit normally on monitor lead i tmov varistor application examples the application examples below show how the indicator lead on the i tmov can be used to indicate that the thermal element has been opened. this signifies that the circuit is no longer protected from transients by the mov.
100 www.littelfuse.com varistor products high energy industrial thermally protected tmov34s varistor series ordering information tmov 34 s m 150 device family littelfuse thermally protected mov disc diameter (mm) 34 mm ceramic shape s: square series designator m: 3-leaded tmov34s varistor series supplied in bulk pack v m(ac)rms 115v to 750v x2696 optional design 5 digit suffix when alternative 3mm wide monitor lead is required standard parts part number t max body thickness s mounting terminal offset tmov34s111m 11.9 5.2 ?65 tmov34s131m 12.2 5.5 ?65 tmov34s141m 12.3 5.7 ?.85 tmov34s151m 12.4 5.9 ?.85 tmov34s181m 12.8 6.3 ?.85 tmov34s201m 13.0 6.5 ?.85 tmov34s251m 11.8 6.25 ?.85 tmov34s271m 12.0 6.5 ?.85 tmov34s301m 12.3 6.8 ?.0 tmov34s321m 12.5 6.9 ?.0 tmov34s331m 13.0 7.2 ?.0 tmov34s351m 13.1 7.4 ?.0 tmov34s391m 13.2 7.6 ?.0 tmov34s421m 13.4 7.85 ?.0 TMOV34S461M 13.7 8.15 ?.0 tmov34s481m 13.9 8.25 ?.0 tmov34s511m 14.2 8.6 ?.0 tmov34s551m 14.8 8.65 ?.0 tmov34s571m 15.0 8.85 ?.0 tmov34s621m 15.4 9.25 ?.0 tmov34s661m 15.8 9.65 ?.0 tmov34s681m 16.0 9.85 ?.0 tmov34s751m 16.3 10.65 ?.0 note: dimension in mm is typical, unless to order alternative design with narrow 3mm monitor lead(right hand terminal as shown) add suffix x2696 to part number otherwise specified
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