© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Description
Features
• RoHS Compliant
and Lead-free
• 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
Agency Approvals
Applications
• SPD Products
• AC Panel Protection Modules
• AC/DC power supplies
• UPS (Uninterruptible Power Supply)
Agency Agency Approval Agency File Number
UL1449 E320116
IEC-CECC Spec:
QC42201-C001,
QC42201-A001,
IEC 60950-1 (Annex Q)
E1274/F
IEC 61051-1,
IEC 61051-2,
IEC 60950-1 (Annex Q) 40021525
TMOV®25S Varistor Series
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 Varistor Series was designed to
address this condition in a single integrated package.
The TMOV®25S Varistor 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 Varistor Series meets the surge suppressor
component recognition requirements of UL1449 3rd
edition for both cord connected and permanently
connected SPD end products.
RoHS
Additional Information
Datasheet Samples
Resources
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
TMOV®25S Varistor Series Units
Continous
AC Voltage Range (VM(AC)RMS) 115 to 750 V
Transient
Peak Pulse Current (ITM)
For 8x20μs 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 (TSTG) -55 to +125 °C
Temperature Coefficient (αV) 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
2 Leaded Device -
Without Indicator Lead
3 Leaded Device -
With Indicator Lead Option Model
Size Disc
Diameter
(mm)
Maximum Rating (85°C) Specifications (25 °C)
Continuous Transient Varistor
Voltage at
1mA Test
Current
Clamping
Voltage
at 100A
Current
8/20μs
Typical
Capacitance
(f=1MHz)
AC
Volts
DC
Volts
Energy
2ms
Peak
Current
8/20μs
Part
Number Branding Part
Number Branding
VM(AC)
RMS
VM(DC) WTM
ITM 1 ×
Pulse
VN(DC)
Min
VN(DC)
Max VCC
(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 184.5 225.5 335 2800
TMOV25SP140E P25T140E TMOV25SP140M P25T140M 25 140 180 210 20000 198 242 355 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 283 345 530 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 900
TMOV25SP420E P25T420E TMOV25SP420M P25T420M 25 420 560 460 20000 612 748 1100 820
TMOV25SP440E P25T440E TMOV25SP440M P25T440M 25 440 585 470 20000 643.5 786.5 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 74 5 550 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
Device Ratings & Specifications
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.
Notes:
Average power dissipation of transients should not exceed 1.5 watts.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Typical time to open circuit under UL 1449 Abnormal Overvoltage
Limited Current Test:
Thermal Characteristics
0.1
1
10
10 100100010000
Current (A)
10 A
5 A
2.5 A
0.5 A
Time (secs)
Typical
100
1000
10000
10µA 100µA1mA 10mA 100mA1A10A 100A 1000A 10000A 100000A
Peak Current
Maximum Peak Voltage (V)
750
625
550
510
460
440
385 420
115130
140150175 230 250
275 300
320
Transient V–I Characteristic Curves
Figure 1
Figure 3
For applications exceeding 85ºC ambient temperature, the peak
surge current and energy ratings must be reduced as shown.
Peak Current & Energy Derating Curve
100
80
60
40
20
0
-55
50 60 70 80 90 100110 120130
AMBIENT TEMPERATURE (ºC)
PERCENT OF RATED VALUE
Figure 2
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Pulse Rating Curve
Wave Solder Profile
Because the TMOV®25S Varistor 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, wave-soldering: 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® Varistor 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
0
50
100
150
200
250
300
0.0 0.5 1.01.5 2.0 2.5 3.0 3.5 4.0
TIME (MINUTES)
MAXIMUM WAVE 260ºC
PREHEAT
TEMPERATURE (ºC)
1
2
∞
15
102
103
1
10
100
1000
10000
100000
10100 1000 10000
Impulse Duration (µsecs)
104
105
106
Surge Current (A)
Number of Pulses
20
Figure 4
Figure 5
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Application Example
The application example left shows how the indicator lead
on the TMOV® Varistor 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.
Line
Line Fuse
Diode
LED
R
Neutral
TO PROTECTED CIRCUIT
Monitor
Lead
3
2
1
1
2
3
Monitor
Lead
Operating/Storage Temperature -55°C to +85°C
Humidity Aging +85°C, 85%R.H., 1000 hours
-/+10% typical voltage change
Thermal Shock +85°C to -40°C 5 times
-/+10% typical voltage change
Solvent Resistance MIL-STD-202, Method 215
Moisture Sensitivity Level 1, J-STD-020
Lead Material Tin–coated Copper wire
Soldering
Characteristics
Solderability per MIL-STD-202,
Method 208
Insulating Material Cured, flame retardant epoxy polymer meets
UL94V-0 requirements
Device Labeling Marked with LF, voltage, UL logos, and date code
Physical Specifications Environmental Specifications
Dimensions
D
A
L
e1
E
b
Indicator
Lead
3 Leaded Device
With Indicator Lead Option
(M part number suffix)
e
W
W2
W2
W
W2
D
A
L
E
b
e
W2
2 Leaded Device
Without Indicator Lead
(E part number suffix)
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/19/19
Metal-Oxide Varistors (MOVs)
Radial Lead Varistors > TMOV®25S Varistor Series
Part Number Part Number WMIN WMAX W2 EMAX AMAX bMIN bMAX DMAX e e1 L
TMOV25SP115E TMOV25SP115M 1. 5 2.7 3.6+/-1 11. 7
34.5 0.95 1.05 28 19.2 +/-1 12.7 +/-1 12.7 Min.
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
Product Dimensions (mm)
Part Numbering System
TMOV 25 SP150 M
DEVICE FAMILY
Littelfuse thermally responsive MOV
DISC DIAMETER (mm)
25mm
CERAMIC SHAPE
S: Square
SERIES DESIGNATOR
XXXXX
NON-STANDARD OPTION CODES
E: 2–Leaded Device - Without Indicator Lead
M: 3–Leaded Device - With Indicator Lead Option
VM(AC)RMS
115V TO 750V
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
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