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TMOV34S111M Datasheet(PDF) 3 Page - Littelfuse

Part No. TMOV34S111M
Description  Varistor Products - High Energy Industrial Thermally Protected
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Maker  LITTELFUSE [Littelfuse]
Homepage  http://www.littelfuse.com
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TMOV34S111M Datasheet(HTML) 3 Page - Littelfuse

   
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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 85ºC 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 (ºC)
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
IMPULSE DURATION (µs)
10
1
INDEFINITE
105
102
2
103
104
106


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