20T115E Просмотр технического описания (PDF) - Littelfuse, Inc
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20T115E Datasheet PDF : 9 Pages
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Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Thermal Characteristics
Current, Energy, Power Derating Curve
10
Typical
5A
2.5A
0.5A
0.125A
1
0.1
10
Figure 1
100
1000
Time(s)
10000
Note : The TMOV® and iTMOV® varistors are intended,
in conjunction with appropriate enclosure design, to
help facilitate TVSS module compliance to UL 1449, 2nd
Edition Section 37.4 (abnormal overvoltage limited current
requirements). Under these extreme abnormal overvoltage
conditions, some units will exhibit substantial heating,
arcing and venting prior to opening. Modules should be
designed to contain this possibility. Application testing is
strongly recommended.
Maximum Clamping Voltage for 14mm Parts
100
80
60
40
20
0
-55
50
Figure 2
60
70
80
90
100 110 120 130
AMBIENT TEMPERATURE (ºC)
For applications exceeding 85°C ambient temperature, the
peak surge current and energy ratings must be reduced as
shown above.
Maximum Clamping Voltage for 20mm Parts
10000
14mm
Maximum Clamping Voltage
Maximum Leakage Current
750V
625V
575V
550V
510V
460V
420V
385V
320V
275V
1000
10000
20mm
Maximum Clamping Voltage
Maximum Leakage Current
625V
575V
550V
510V
460V
420V
385V
320V
300V
275V
750V
1000
100
0.000001 0.00001 0.0001 0.001 0.01 0.1 1
Figure 3
Peak Current (A)
250V
230V
200V
175V
150V
140V
130V
115V
10 100 1000 10000
100
0.000001 0.00001 0.0001 0.001 0.01 0.1 1
Figure 4
Peak Current (A)
250V
230V
200V
175V
150V
140V
130V
115V
10 100 1000 10000
TMOV® and i TMOV® Varistor Series
Revision: June 10, 2010
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
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