Littelfuse SMOV25S Varistor Series - Manual (Page 3)

© 2013 Littelfuse, Inc. 239
Revised: May 8, 2013
Varistor Products
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/smov25s.html for current information.
SMOV25S Varistor Series
Thermally Protected Varistors > SMOV25S Series
SMOV
25S
Series
Typical time to open circuit under UL 1449 Abnormal
Overvoltage Limited Current Test:
Thermal Characteristics
0 .1
1
1 0
1 1 0 100
Current (A)
10 A
5 A
2.5 A
0.5 A
Typical
0
20
40
60
80
100
- 45 50 60 70 80 90 100 110 120 130
AMBIENT TEMPERATURE (ºC)
PERCEN
T OF RA
TED
V
ALUE
Peak Current & Energy Derating Curve
100
1000
10000
10μA 100μA 1mA 10mA 100mA 1A 10A 100A 1000A 10000A 100000A
Peak Current
Maximum P
eak
V
oltage (V)
750
625
550
510
460
440
385
420
115
130
140
150
175 230
250
275
300
320
Transient V–I Characteristic Curves
For applications exceeding 75ºC ambient temperature, the
peak surge current and energy ratings must be reduced
as shown below.
Figure 1
Figure 2
Figure 3