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TMOV20R575E Datasheet(PDF) 6 Page - Littelfuse

Part # TMOV20R575E
Description  Varistor Products - Thermally Protected
Download  9 Pages
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Manufacturer  LITTELFUSE [Littelfuse]
Direct Link  http://www.littelfuse.com
Logo LITTELFUSE - Littelfuse

TMOV20R575E Datasheet(HTML) 6 Page - Littelfuse

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Varistor Products
TMOV® and iTMOV® 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
5.
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
Transient V-I Characteristic Curves
100
1000
10000
0.000001 0.00001 0.0001 0.001
0.01
0.1
1
10
100
1000
10000
Peak Current (A)
175V
150V
140V
130V
320V
275V
250V
230V
Figure 6: V-I Characteristic Curves for 14mm Types
420V
385V
115V
Maximum Leakage Current
Maximum Clamping Voltage
14mm
200V
460V
510V
550V
575V
625V
750V
100
1000
10000
0.000001 0.00001 0.0001 0.001
0.01
0.1
1
10
100
1000
10000
Peak Current (A)
175V
150V
140V
130V
320V
275V
250V
230V
Figure 7: V-I Characteristic Curves for 20mm Types
420V
385V
115V
Maximum Leakage Current
Maximum Clamping Voltage
20mm
200V
460V
510V
550V
575V
625V
750V
300V
Figure 9: Pulse Rating Curves for 20mm types
1
10
100
1000
10000
10
100
1000
10000
Impulse Duration ( s)
1
10
2
10
3
Model 20 mm
2
10
4
10
5
10
6
10
Figure 8: Pulse Rating Curves for 14mm types
1
10
100
1000
10000
10
100
1000
10000
Impulse Duration ( s)
1
10
10
2
10
3
Model 14 mm
2
10
4
10
5
10
6
Pulse Rating Curves
Note : The TMOV and iTMOV varistors 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 require-
ments). 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.
Thermally Protected
NOTE: Average power dissipation of transients should not exceed 1.0W
NOTE: Average power dissipation of transients should not exceed 0.6W


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