Varistor Products
Radial Lead Varistors > UltraMOV TM 25S Series
UltraMOV? 25S Series Ratings & Speci?cations
Maximu m Rating (85°C)
Speci?cations (25°C)
Energy
2ms
I TM
1 x Pulse
Part
Number
Branding
Continuous Transient
Peak Surge
AC Volts DC Volts Current
8 x 20 μ s
W TM
V V 1x
Pulse
Varistor Voltage
at 1mA DC
Test Current
V V
Min Max
Maximum
Clamping
Voltage at 100A,
8 x 20 μ s
V
UL 1449 ed.3
Voltage
Protection
Rating
VPR
Typical
Capaci-
tance
f = 1MHz
C
(V) (V) (J) (A)
(V)
(V)
(pF)
Transient V-I Characteristics Curves
Peak Current, Energy and Power Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
100
100
80
60
40
20
50
0
Figure 1
55
5 0
60 70 80 90 100 110 120 130
AM BIEN T T EM PER AT U R E (oC )
0
O 1
Figure 2
t
t 1
t 2
T IM E
T
T 2
Example
μ
μ
2
μ
UltraMOV? 25S Varistor Series
96
Revision: July 28, 2009
?2009
?2008 Littelfuse, Inc.
Speci?cations are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
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