Varistor Products
Radial Lead Varistors > TMOV®25S Series
TMOV®25S Varistor Series
Agency Approvals
Agency Agency File Number Status
UL1449 3rd Edition E320116
IEC-CECC Spec:
QC42201-C001,
QC42201-A001,
IEC 60950-1 (Annex Q)
IEC 61051-1,
IEC 61051-2,
IEC 60950-1 (Annex Q)
E1274/F
40021525
RoHS
Description
Metal Oxide Varistors (MOVs) are rated for specific AC line
operating voltages, and exceeding these limits through the
application of a sustained abnormal over-voltage condition
could result in overheating and damage to the MOV.
The Littelfuse TMOV
®
25S (Thermal MOV) Series was
designed to address this condition in a single integrated
package.
The TMOV
®
25S Series incorporates a patented integrated
thermally responsive element within the body of the device
which will open-circuit the varistor in case of overheating
due to the abnormal over-voltage events.
The TMOV
®
25S Series is based on the Littelfuse
UltraMOV™ 25S Series, which meets the surge
suppressor component recognition requirements
of UL1449 3rd edition for both cord connected and
permanently connected SPD end products.
Features
• RoHS Compliant
and Lead-free
• Patented integrated
thermal protection device
- Patent #US6636403
• Wave solderable
• Standard Operating
Voltage Range
Compatible with
Common AC Line
Voltages (115VAC
to 750VAC
• High peak surge current
rating up to 20kA at
single 8/20µS impulse
• Standard lead form
and spacing option
• -55°C to +85°C operating
temperature range
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Applications
215
Revised: May 8, 2013
• SPD Products
• AC Panel Protection Modules
• AC Line Power Supplies
• Surge Protected Strip Connectors
• AC Power Meters
• Inverters, AC/DC power supplies, etc.
• UPS (Uninterruptible Power Supply)
TMOV®25S Varistor Series
25S Series
®
TMOV
Varistor Products
Radial Lead Varistors > TMOV®25S Series
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
TMOV®25S Series
Continous:
AC Voltage Range (V
) 115 to 750 V
M(AC)RMS
Transient:
Peak Pulse Current (ITM)
For 8x20s Current Wave, single pulse 20,000 A
Single-Pulse Energy Capability
For 2ms Current Wave 170 to 670 J
Operating Ambient Temperature Range (TA) -55 to +85 °C
Storage Temperature Range (T
) -55 to +125 °C
STG
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current <0.01 %/°C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability) 2,500 V
Thermal Protection Isolation Voltage Capability (when operated)
*See notes under Device Ratings & Specifications section for more information
600* V
COATING Insulation Resistance 1,000 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.
Units
Device Ratings & Specifications
Maximum Rating (85°C) Specifications (25 °C)
2 Leaded Device -
Without Indicator Lead
Part
Number
Branding
3 Leaded Device -
With Indicator Lead Option
Part
Number
Branding
Model
Size Disc
Diameter
(mm)
Continuous Transient
AC
DC
Volts
V
M(AC)RMSVM(DC)WTM
Energy
Volts
2ms
Peak
Current
8/20s
ITM 1 ×
Pulse
(V) (V) (J) (A) (V) (V) (pF)
TMOV25SP115E P25T115E TMOV25SP115M P25T115M 25 115 150 170 20000 162 198 295 3200
TMOV25SP130E P25T130E TMOV25SP130M P25T130M 25 130 170 190 20000 184 226 335 2800
TMOV25SP140E P25T140E TMOV25SP140M P25T140M 25 140 180 210 20000 200 240 355 2500
TMOV25SP150E P25T150E TMOV25SP150M P25T150M 25 150 200 220 20000 216 264 390 2300
TMOV25SP175E P25T175E TMOV25SP175M P25T175M 25 175 225 250 20000 243 297 450 1900
TMOV25SP200E P25T200E TMOV25SP200M P25T200M 25 200 265 270 20000 281 344 530 1700
TMOV25SP230E P25T230E TMOV25SP230M P25T230M 25 230 300 300 20000 324 396 585 1500
TMOV25SP250E P25T250E TMOV25SP250M P25T250M 25 250 320 330 20000 351 429 640 1400
TMOV25SP275E P25T275E TMOV25SP275M P25T275M 25 275 350 350 20000 387 473 700 1250
TMOV25SP300E P25T300E TMOV25SP300M P25T300M 25 300 385 370 20000 423 517 765 1150
TMOV25SP320E P25T320E TMOV25SP320M P25T320M 25 320 420 390 20000 459 561 825 1080
TMOV25SP385E P25T385E TMOV25SP385M P25T385M 25 385 505 430 20000 558 682 1010 9 00
TMOV25SP420E P25T420E TMOV25SP420M P25T420M 25 420 560 460 20000 612 748 1100 820
TMOV25SP440E P25T440E TMOV25SP440M P25T440M 25 440 585 470 20000 643 787 1160 790
TMOV25SP460E P25T460E TMOV25SP460M P25T460M 25 460 615 490 20000 675 825 1220 750
TMOV25SP510E P25T510E TMOV25SP510M P25T510M 25 510 670 520 20000 738 902 1335 680
TMOV25SP550E P25T550E TMOV25SP550M P25T550M 25 550 745 550 20000 819 1001 1475 630
TMOV25SP625E P25T625E TMOV25SP625M P25T625M 25 625 825 600 20000 900 1100 1625 550
TMOV25SP750E P25T750E TMOV25SP750M P25T750M 25 750 970 670 20000 1080 1320 1950 460
Notes:
Average power dissipation of transients should not exceed 1.5 watts.
Varistor
Voltage at
1mA Test
Current
V
V
N(DC)
Min
Max
100A Current
N(DC)
Clamping
Voltage at
8/20s
V
C
Typical
Capacitance
(f=1MHz)
C
TMOV®25S Varistor Series
216
Revised: May 8, 2013
Please refer to www.littelfuse.com/series/tmov.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > TMOV®25S Series
Thermal Characteristics
Typical time to open circuit under UL 1449 Abnormal
Overvoltage Limited Current Test:
10
1
Current (A)
0.1
10 100 1000 10000
Figure 1
Time (secs)
Transient V–I Characteristic Curves
10000
Typical
10 A
5 A
2.5 A
0.5 A
Current, Energy, Power Derating Curve
For applications exceeding 85ºC ambient temperature, the
peak surge current and energy ratings must be reduced
as shown below.
100
80
60
40
20
PERCENT OF RATED VALUE
0
- 55 506070
Figure 2
AMBIENT TEMPERATURE (ºC)
80
90 10 0 110 12 0 130
625
550
510
460
440
385
1000
Maximum Peak Voltage (V)
140
130
11 5
100
10µA 100µA 1mA 10mA 100mA 1A 10A 100A 1000A 10000A 100000A
Figure 3
Peak Current
420
150
175 230
250
275
300
320
750
25S Series
®
TMOV
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
217
Revised: May 8, 2013
TMOV®25S Varistor Series
Pulse Rating Curve
100000
Number of Pulses
1
2
10000
1000
Surge Current (A)
100
15
10
10
10
10
10
∞
Varistor Products
Radial Lead Varistors > TMOV®25S Series
2
3
4
5
6
10
1
10 100 1000 10000
Figure 4
Impulse Duration (μsecs)
Wave Solder Profile
Because the TMOV®25S Series contains a thermally
responsive device, care must be taken when soldering
the device into place. Two soldering methods are possible.
Firstly, hand soldering: We recommend the use of pliers
to heat-sink the leads of the device. Secondly, wavesoldering: This is a strenuous process requiring pre-heat
stages to reduce the stresses on devices.
It is critically important that all preheat stage and the
solder bath temperatures are rigidly controlled. The
recommended solder for the TMOV
®
Series is a 62/36/2
(Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also
recommends an RMA solder flux. SAC solders (SnAgCu)
are recommended for Lead-free applications.
Soldering Profile
300
250
200
150
100
TEMPERATURE (ºC)
50
0
0.0 0.5 1.0 1. 5 2.0 2.5 3.0 3.5 4.0
Figure 5
MAXIMUM WAVE 260ºC
PREHEAT
TIME (MINUTES)
TMOV®25S Varistor Series
218
Revised: May 8, 2013
Please refer to www.littelfuse.com/series/tmov.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Varistor Products
Line
Line Fuse
Diode
LED
R
Neutral
TO PROTECTED CIRCUIT
Monitor
Lead
3
3
Radial Lead Varistors > TMOV®25S Series
Physical Specifications
Lead Material Tin–coated Copper wire
Soldering
Characteristics
Insulating Material
Device Labeling
Solderability per MIL-STD-202,
Method 208E
Cured, flame retardant epoxy polymer
meets UL94V-0 requirements
Marked with LF, voltage, UL logos, and
date code
Application Example
The application example left shows how the indicator
lead on the TMOV
®
can be used to indicate that thermal
element has been opened. This signifies that the circuit is
no longer protected from transients by the MOV.
Environmental Specifications
Operating/Storage
Temperature
Passive Aging
Humidity Aging
Thermal Shock
Solvent Resistance MIL-STD-202, Method 215F
Moisture Sensitivity Level 1, J-STD-020C
-40°C to +85°C
+85°C, 1000 hours
-/+10% typical voltage change
+85°C, 85%R.H., 1000 hours
-/+10% typical voltage change
+85°C to -40°C 5 times
-/+10% typical voltage change
Monitor
Lead
25S Series
®
TMOV
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
219
Revised: May 8, 2013
TMOV®25S Varistor Series
Dimensions
Varistor Products
Radial Lead Varistors > TMOV®25S Series
2 Leaded Device
Without Indicator Lead
(E part number suffix)
D
b
e
E
A
L
W2
3 Leaded Device
With Indicator Lead Option
(M part number suffix)
D
Indicator
Lead
b
e1
e
W2
Product Dimensions (mm)
Part Number Part Number W
MINWMAX
TMOV25SP115E TMOV25SP115M 1.5 2.7 3.6+/-1 11.7
TMOV25SP130E TMOV25SP130M 1.6 2.9 3.7+/-1 11.9
TMOV25SP140E TMOV25SP140M 1.7 3.0 3.8+/-1 12.0
TMOV25SP150E TMOV25SP150M 1.8 3.1 3.9+/-1 12.1
TMOV25SP175E TMOV25SP175M 1.9 3.3 4.1+/-1 12.3
TMOV25SP200E TMOV25SP200M 1.9 3.3 4.1+/-1 12.3
TMOV25SP230E TMOV25SP230M 2.0 3.4 4.2+/-1 12.4
TMOV25SP250E TMOV25SP250M 2.1 3.5 4.3+/-1 12.5
TMOV25SP275E TMOV25SP275M 2.3 3.7 4.5+/-1 12.7
TMOV25SP300E TMOV25SP300M 2.4 3.9 4.6+/-1 12.9
TMOV25SP320E TMOV25SP320M 2.6 4.1 4.8+/-1 13.1
TMOV25SP385E TMOV25SP385M 3.0 4.7 5.3+/-1 13.7
TMOV25SP420E TMOV25SP420M 3.3 5.0 5.6+/-1 14.0
TMOV25SP440E TMOV25SP440M 3.4 5.2 5.8+/-1 14.2
TMOV25SP460E TMOV25SP460M 3.6 5.4 6+/-1 14.4
TMOV25SP510E TMOV25SP510M 3.9 5.7 6.3+/-1 14.7
TMOV25SP550E TMOV25SP550M 4.2 6.2 6.7+/-1 15.2
TMOV25SP625E TMOV25SP625M 4.6 6.6 7.1+/-1 15.6
TMOV25SP750E TMOV25SP750M 5.4 7.7 8.0+/-1 16.7
W2 E
MAXAMAXbMINbMAX
E
A
L
W
W2
W
W2
D
MAX
ee1L
34.5 0.95 1.05 28 19.2 +/-1 12.7 +/-1 12.7 Min.
TMOV®25S Varistor Series
220
Revised: May 8, 2013
Please refer to www.littelfuse.com/series/tmov.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > TMOV®25S Series
Part Numbering System
TMOV25 SP150M
DEVICE FAMILY
Littelfuse thermally responsive MOV
DISC DIAMETER (mm)
25mm
CERAMIC SHAPE
S: Square
Term Definitions
Rated AC Voltage (V
M(AC)RMS
) – MCOV
This is the maximum continuous sinusoidal RMS voltage
that may be applied. This voltage may be applied at any
temperature up to the maximum operating temperature
of the device.
Maximum Non-Repetitive Surge Current (ITM)
This is the maximum peak current which may be applied
for a single 8/20µs impulse, with rated line voltage also
applied, without causing device failure. The pulse can
be applied to the device in either polarity with the same
confidence factor.
Nominal Discharge Current (IN)
Peak value of the current, selected by the manufacturer,
through the SPD having a current waveshape of 8/20µs
where the SPD remains functional after 15 surges.
Voltage Protection Rating (VPR)
A rating selected from a list of preferred values as given
in UL 1449 and assigned to each mode of protection. The
value of VPR is determined as the nearest highest value
taken from UL 1449 to the measured limiting voltage
determined during the transient-voltage surge suppression
test using the combination wave generator at a setting of
6kV, 3kA.
XXXXX
NON-STANDARD OPTION CODES
SERIES DESIGNATOR
E: 2–Leaded Device - Without Indicator Lead
M: 3–Leaded Device - With Indicator Lead Option
V
M(AC)RMS
115V TO 750V
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
UL 1449
An Underwriters Laboratory standard covering the safety
requirements for Surge Protective Devices intended for
permanently connected, cord-connected and direct plug-in
applications.
Limited Current Abnormal Over-voltage Test
An AC over-voltage condition applied to a Surge Protective
Device according to UL 1449, Section 39.4. The short
circuit current is limited by series connected resistors
to 10A, 5A, 2.5A, 0.5A and 0.125A. The condition is
maintained for 7 hours or until the device under test
is disconnected from the AC supply or the current or
temperature reaches equilibrium.
Maximum Non-Repetitive Surge Energy (WTM)
This is the maximum rated transient energy which may be
dissipated for a single current pulse at a specified impulse
duration, with the rated RMS voltage applied, without
causing device failure.
Nominal Voltage (V
N(DC)
)
This is the voltage at which the device changes from the
off (standby state) to the on (clamping state) and enters
its conduction mode of operation. The voltage value is
usually characterised at the 1mA point and has a specified
minimum and maximum voltage range.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
221
Revised: May 8, 2013
TMOV®25S Varistor Series
25S Series
®
TMOV
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