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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) 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 thermal 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.
(R)
2
VARISTOR PRODUCTS
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.
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
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 conditions. 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)
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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) Varistor Series
Absolute Maximum Ratings 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 (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 to 750 Transient: Peak Pulse Current (ITM) For 8x20s Current Wave, single pulse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40,000 Single-Pulse Energy Capability For 2ms Current Wave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 to 1050 Operating Ambient Temperature Range (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +85 Storage Temperature (TSTG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125 Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 Thermal Protection Isolation Voltage Capability (when operated) -Under UL1449 Limited Current Test Procedure-see Note #1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000
UNITS
V
A J C o C %/oC V V 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 "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 specification is not implied.
Device Ratings and Specifications - TMOV Varistor SeriesTM
CONTINUOUS AC VOLTS PART NUMBER VM(AC)RMS (V) DC VOLTS VM(AC)
MAXIMUM RATING (85C) TRANSIENT PEAK SURGE MCOV ENERGY CURRENT SURGE ARRESTER 2ms 8/20s ITM WTM VM(AC)RMS 1 x PULSE 1 x PULSE (V) (J) (A)
SPECIFICATIONS (25C) MAXIMUM VARISTOR CLAMPING VOLTAGE VOLTAGE AT 1mA 8/20s at 200A TEST CURRENT VN(DC) MIN (V) VN(DC) MAX VC (V)
TYPICAL CAPACITANCE f = 1MHz C (pF)
TMOV34S111M TMOV34S131M TMOV34S141M TMOV34S151M TMOV34S181M TMOV34S201M TMOV34S251M TMOV34S271M TMOV34S301M TMOV34S321M TMOV34S331M TMOV34S351M TMOV34S391M TMOV34S421M6 TMOV34S461M6 TMOV34S481M6 TMOV34S511M6 TMOV34S551M6 TMOV34S571M6 TMOV34S621M6 TMOV34S661M6 TMOV34S681M6 TMOV34S751M6
96
115 130 140 150 180 200 250 275 300 320 330 350 385 420 460 480 510 550 575 620 660 680 750
150 175 188 200 240 265 330 369 400 420 435 460 506 560 610 640 675 700 730 800 850 890 970
98 111 119 128 153 170 213 234 255 272 281 298 327 357 391 408 434 468 489 527 561 578 638
235 270 291 300 330 335 370 400 435 460 475 500 550 600 620 650 700 735 770 840 900 950 1050
400001 400002 400003 400004 400005 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000
163 184 198 212 254 283 354 389 433 462 476 505 555 610 642 670 735 770 805 880 940 980 1080
202 228 248 268 312 357 429 473 528 561 581 616 678 748 783 825 910 939 1000 1074 1160 1195 1320
305 345 375 405 488 540 650 730 780 830 855 910 1005 1130 1188 1240 1350 1415 1480 1589 1720 1772 2000
11500 10000 9000 8000 6800 6500 5000 4500 4050 3800 3700 3500 3300 3000 2800 2700 2500 2250 2200 2100 2000 1970 1800
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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) Varistor Series
Thermal Characteristics
10
100
Typical
PERCENT OF RATED VALUE
5A 2.5A 0.5A 0.125A
80
60
1
40
20
2
VARISTOR PRODUCTS
97
-55 50 60 70 80 90 100 AMBIENT TEMPERATURE (C) 110 120 130
0.1 10 100
Time s
1000
10000
0
* Figure 4: Typical time to open circuit under UL1449 Abnormal Overvoltage Limited Current Test
Figure 5: Peak Current & Energy Derating Curve
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 limited 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.
For applications exceeding 85C ambient temperature, the peak surge current and energy ratings must be reduced as shown in Figure 3.
Pulse Rating Curves
50,000 1 20,000 10,000 SURGE CURRENT (A) 5,000 2,000 1,000 500 200 100 50 20 10 INDEFINITE 20 100 1,000 IMPULSE DURA TION (s) 10,000 2 10 102 103 104 105
Hx34
106
FIGURE 6. SURGE CURRENT RATING CURVES FOR HB34, HF34 and HG34
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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) Varistor Series
Transient V-I Characteristic Curves
10000
TMOV34S
TA = -55 C to 85C
V751 V661
Voltage Volts
V681
V511
V551
V571
1000
V481 V141 V131 V441
Current - AMPS
100 0.001 0.01 0.1 1 10 100 1000
V111
V151
10000 100000
V421 V391 V351 V331 V321 V301 V271 V251 V201 V181
Fig 7. V-I Characteristic Curves For TMOV34S(R) Varistor
98
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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) Varistor Series
iTMOV Varistor Application Examples
The application examples below show how the indicator lead on the iTMOV 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.
Line
Monitor Lead
2
VARISTOR PRODUCTS
99
Line Fuse To Protected Circuit Normally On TMOV34S LED
R Neutral
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Varistor Products
High Energy Industrial Thermally Protected
TMOV34S(R) Varistor Series
Part Number T max Body Thickness S Mounting Terminal Offset
NOTE: Dimension in mm is typical, unless otherwise specified To order alternative design with narrow 3mm monitor lead(right hand terminal as shown) add suffix X2696 to part number
TMOV34S111M TMOV34S131M TMOV34S141M TMOV34S151M TMOV34S181M TMOV34S201M TMOV34S251M TMOV34S271M TMOV34S301M TMOV34S321M TMOV34S331M TMOV34S351M TMOV34S391M TMOV34S421M TMOV34S461M TMOV34S481M TMOV34S511M TMOV34S551M TMOV34S571M TMOV34S621M TMOV34S661M TMOV34S681M TMOV34S751M
11.9 12.2 12.3 12.4 12.8 13.0 11.8 12.0 12.3 12.5 13.0 13.1 13.2 13.4 13.7 13.9 14.2 14.8 15.0 15.4 15.8 16.0 16.3
5.2 .65 5.5 .65 5.7 0.85 5.9 0.85 6.3 0.85 6.5 0.85 6.25 0.85 6.5 0.85 6.8 1.0 6.9 1.0 7.2 1.0 7.4 1.0 7.6 1.0 7.85 1.0 8.15 1.0 8.25 1.0 8.6 1.0 8.65 1.0 8.85 1.0 9.25 1.0 9.65 1.0 9.85 1.0 10.65 1.0
Ordering Information
Standard Parts
TMOV DEVICE FAMILY Littelfuse Thermally Protected MOV DISC DIAMETER (mm) 34 mm CERAMIC SHAPE S: Square VM(AC)RMS 115V to 750V Optional Design 5 digit suffix when alternative 3mm wide monitor lead is required Series Designator M: 3-Leaded TMOV34S Varistor Series Supplied in Bulk Pack
100
34
S
150
M
X2696
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