Littelfuse SMOV34S Varistor Series - Manual (Page 3)

© 2013 Littelfuse, Inc. 245
Revised: May 8, 2013
Varistor Products
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/smov34s.html for current information.
SMOV34S Varistor Series
Thermally Protected Varistors > SMOV34S Series
HI–ENERGY MO
V’S
SMOV34S Series
Pulse Rating Curve
SMOV34
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
20 100 1,000 10,000
SUR
GE CURREN
T
(A)
IMPULSE DURATION ( μs)
15
1
INDEFINITE
105 102
2
103
104
106
Peak Current & Energy Derating Curve
0 .1
1
1 0
1 1 0 10 0
Current (A)
10 A
5 A
2.5 A
0.5 A
Time (secs)
Typical
SMOV34S V–I Characteristic Curves for SMOV34S Varistor
1000
10000
1mA 10mA 100mA 1A 10A 100A 10000A 100000A
TA = -45 C to 75C
V751
V681 V661
V571
V551
V511
V391 V351 V331 V321 V271 V251 V201 V181
V151
V141
V111
V131
V301
V481
V441
V421
100
1000A
Maximum Clamping Voltage
SMOV34S series
Current - AMPS
Voltage -
VOLTS
For applications exceeding 75ºC ambient temperature, the peak
surge current and energy ratings must be reduced as shown.
Figure 1
Figure 2
Figure 3
Figure 4
Thermal Characteristics
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