Varistor Products
Radial Lead Varistors > UltraMOV
TM
25S Series
UltraMOV
TM
25S Varistor Series
Description
RoHS
The UltraMOV
TM
25S Varistor Series is designed for
applications requiring high peak surge current ratings and
high energy absorption capability. UltraMOV™ varistors are
primarily intended for use in AC Line Voltage applications
such as Surge Protective Devices (SPD), Uninterruptable
Power Supplies (UPS), AC Power Taps, AC Power Meters,
or other products that require voltage clamping of high
transient surge currents from sources such as lightning,
inductive load switching, or capacitor bank switching.
These devices have 25mm square forms are produced
in a radial lead package and offered with straight leads.
UltraMOVs are manufactured with recognized epoxy
encapsulation and are rated for ambient temperatures
up to 85°C with no derating. This 25S Series is
LASER-branded and is supplied in bulk packaging.
Agency Approvals
Agency
Agency FIle Number
Status
E320116
091788
Approved
Approved
Features
• Lead–free and
RoHS compliant.
• High peak surge
current rating (I
TM
)
22kA, single 8/20μs
pulse, (25mm)
• 40kA rating when 2
devices paralleled
(VN(DC) matched
within +/- 5%,
contact factory for
special selections
• Standard operating
voltage range
compatible with
common AC line
voltages (115 to
750VAC)
• Characterized for
maximum standby
current (Leakage)
• Custom voltage
types available
• Standard lead form
and lead space options
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
Transients:
Peak Pulse Current (I
TM
) 8x20μs Current Wave Single Pulse
Single-Pulse Energy Capability (W
TM
) 2ms Current Wave
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (a ) of Clamping Voltage (V
C
) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectic Withstand DC for 1 min per MIL–STD–202, Method 301
Insulation Resistance of the Epoxy Coating
V
UltraMOV
TM
25S Series
115 to 750
150 to 970
22,000
230 to 890
-55 to +85
-55 to +125
<0.01
2500
1000
Units
V
V
A
J
ºC
ºC
%/C
V
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
107
Revised: May 8, 2013
UltraMOV™ 25S Varistor Series
UltraMOV
™
25S Series
Varistor Products
Radial Lead Varistors > UltraMOV
TM
25S Series
UltraMOV™ 25S Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Transient
Peak Surge
Energy
AC Volts DC Volts
Current
2ms
8 x 20μs
W
TM
I
TM
V
M(AC)RMS
V
M(DC)
1x
1 x Pulse
Pulse
(V)
(V)
(J)
(A)
115
150
230
22000
130
170
255
22000
140
180
285
22000
150
200
300
22000
175
225
315
22000
230
300
400
22000
250
320
435
22000
275
350
470
22000
300
385
500
22000
320
420
540
22000
385
505
630
22000
420
560
655
22000
440
585
675
22000
460
615
690
22000
510
670
700
22000
550
745
765
22000
625
825
800
22000
750
970
890
22000
Specifications (25°C)
Varistor Voltage
at 1mA DC
Test Current
V
NOM
Min
(V)
162
184
200
216
243
324
351
387
423
459
558
612
643
675
738
819
900
1080
198
226
240
264
297
396
429
473
517
561
682
748
787
825
902
1001
1100
1320
295
335
355
390
450
585
640
700
765
825
1010
1100
1160
1220
1335
1475
1625
1950
V
NOM
Max
Maximum
UL 1449 ed.3
Clamping
Voltage
Voltage at 100A,
Protection
8 x 20μs
Rating
V
C
(V)
400
500
500
500
600
700
800
900
1000
1000
1200
1500
n/a
n/a
n/a
n/a
n/a
n/a
VPR
Typical
Capaci-
tance
f
= 1MHz
C
(pF)
4500
3900
3500
3200
2550
1900
1750
1610
1450
1350
1080
1000
900
870
820
750
660
550
Part
Number
Branding
V25S115P
V25S130P
V25S140P
V25S150P
V25S175P
V25S230P
V25S250P
V25S275P
V25S300P
V25S320P
V25S385P
V25S420P
V25S440P
V25S460P
V25S510P
V25S550P
V25S625P
V25S750P
P25S115
P25S130
P25S140
P25S150
P25S175
P25S230
P25S250
P25S275
P25S300
P25S320
P25S385
P25S420
P25S440
P25S460
P25S510
P25S550
P25S625
P25S750
Note:
Average powder dissipation of transients should not exceed 1.5 watts.
Transient V-I Characteristics Curves
Peak Current, Energy and Power Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
100
100
P E R C E N T O F R A TE D V A L U E
80
60
40
20
PER C EN T O F PEAK VAL U E
50
0
O
1
t
t
1
t
2
T IM E
0
55
50
60
70
80
90
100 110 120 130
Figure 2
Figure 1
AM BIEN T T EM PER AT U R E (ºC )
For applications exceeding 85ºC ambient temperature, the
peak surge current and energy ratings must be reduced as
shown above.
UltraMOV™ 25S Varistor Series
108
Revised: May 8, 2013
0
1
= Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T
1
= Rise Time = 1.25 x T
T
2
= Decay Time
Example
- For an 8/20
μs
Current Waveform:
8μs = T
1
= Rise Time
20μs = T
2
= Decay Time
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOV
TM
25S Series
V-I Limit Curves
10000
625
M a xim u m P e a k Vo lta g e (V )
460
510
550
750
385
420
440
1000
115
100
0.0 0 0 0 1
130
140
150
175
230
250
275
300
320
0.0 0 0 1
0.0 0 1
0.0 1
0.1
1
P e a k C u rre n t (A )
10
100
1000
10000
100000
Pulse Rating Curves
100000
1
10000
2
15
1 0
2
1 0
3
Peak Current (A)
1000
1 0
4
1 0
5
1 0
6
100
∞
10
1
10
100
Impulse Duration (μs)
1000
10000
Figure 4
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
109
Revised: May 8, 2013
UltraMOV™ 25S Varistor Series
UltraMOV
™
25S Series
Figure 3
Varistor Products
Radial Lead Varistors > UltraMOV
TM
25S Series
Wave Solder Profile
Non Lead–free Wave Solder Profile
300
250
TEMPERATURE (ºC)
200
150
100
50
0
0
0.5
1
1.5
2
2.5
3
3.5
4
Lead–free Wave Solder Profile
300
Maximum Wave 240C
TEMPERATURE (ºC)
Maximum Wave 260C
250
200
150
100
50
0
0
0.5
1
1.5
2
2.5
3
3.5
4
Figure 5
TIME(MINUTES)
Figure 6
TIME(MINUTES)
Physical Specifications
Lead Material
Soldering
Characteristics
Insulating Material
Copper Clad Steel Wire
Solderability per MIL–STD–202,
Method 208E
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Marked with LF voltage, UL/CSA Logos,
,
and date code
Environmental Specifications
Operating/Storage
Temperature
Passive Aging
-55°C to +85°C/
-55°C to +125°C
+85°C, 1000 hours
+/-10% typical voltage change
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
+85°C to -40°C 5 times
+/-10% typical voltage change
MIL–STD–202, Method 215F
Humidity Aging
Device Labeling
Thermal Shock
Solvent Resistance
Moisture Sensitivity
Level 1, J–STD–020C
UltraMOV
TM
25S Series Varistors for High-Temperature Operating Conditions:
Phenolic coated devices are available with improved maximum operating temperature 125ºC.
These devices also have improved temperature cycling capability. Ratings and specifications
are per standard series except Hi–Pot Encapsulation (Isolation Voltage Capability) = 500V.
To order:
add 'X1347' to part number (e.g. V25S150PX1347). These devices are NOT UL, CSA,
CECC or VDE certified.Contact factory for further details.
UltraMOV™ 25S Varistor Series
110
Revised: May 8, 2013
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOV
TM
25S Series
Product Dimensions (mm)
D
V25S115P
V25S130P
A
max
b
min
b
max
D
max
e
min
e
max
e1
min
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.3
e1
max
2.7
2.9
3.0
3.1
3.3
3.4
3.5
3.7
3.9
4.1
4.7
5.0
5.2
5.4
3.4
3.9
4.3
5.4
E
max
5.7
5.9
6.0
6.1
6.3
6.4
6.5
6.7
6.9
7
.1
7
.7
8.0
8.2
8.4
8.7
9.2
9.6
10.7
L
min
A
V25S140P
V25S150P
V25S175P
V25S230P
L
V25S250P
V25S275P
V25S300P
b
e
e1
V25S320P
V25S385P
V25S420P
32.5
0.95
1.05
28
11.7
13.7
2.4
2.6
3.0
3.3
3.4
3.6
1.6
1.9
2.3
3.1
25.4
E
V25S440P
V25S460P
V25S510P
V25S550P
V25S625P
V25S750P
Notes
1. Additional optional lead form, packaging and lead spacing requirements are subject to availability and to minimum
order requirements. Please contact factory for details.
2. Nickel Barrier Wire option (Suffix 'X2855')Standard parts use Tin-Coated Copper wire. Nickel Barrier Coated Wire
is available as an option. This is Copper Wire with a flashing of Nickel, followed by a top coat of Tin. To order please
add suffix 'X2855' to end of standard part number. Contact factory for more details if required.
3. UltraMOV 25S have been qualified as type 1 application by UL1449 edition 3, which allows Permanant Connection
between the secondary of the service transformer and the line side of the service equipment overcurrent device,
as well as the load side, including watt-hour meter socket enclosures and intended to be installed without an
external overcurrent protective device.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
111
Revised: May 8, 2013
UltraMOV™ 25S Varistor Series
UltraMOV
™
25S Series
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