Metal-Oxide Varistors
(MOVs)
Radial Lead Varistors > TMOV
®
and iTMOV
®
Varistor Series
TMOV and iTMOV Varistor Series
®
®
RoHS
Description
The Littelfuse TMOV
®
and iTMOV
®
thermally protected
varistors represent a new development in integrated
circuit protection. Both versions are comprised of radial
leaded Metal Oxide Varistors (MOVs) with an integrated
thermally activated element designed to open in the
event of overheating due to the abnormal overvoltage,
limited current, conditions outlined in UL1449. The TMOV
®
and iTMOV
®
varistor’s integrated thermal element, in
conjunction with appropriate enclosure design, helps
facilitate SPD module compliance to UL1449 for both cord
connected and permanently connected applications.
The TMOV
®
and iTMOV
®
varistors offer quick thermal
response due to the close proximity of the integrated
thermal element to the MOV body. The integrated
configuration also offers lower inductance than most
discrete solutions resulting in improved clamping
performance to fast overvoltage transients.
The iTMOV
®
varistor differs from the TMOV
®
varistor by the
inclusion of a third lead for the purpose of indicating that
the MOV has been disconnected from the circuit. This lead
facilitates connection to monitoring circuitry.
Additionally TMOV
®
and iTMOV
®
varistors are wave
solderable, thus simplifying end product assembly by
reducing the the expense and rework associated with hand
soldering operations.
Features
•
•
Datasheet
iTMOV
RoHS compliant and
Lead–free available
Designed to facilitate
compliance to UL1449
for SPD products
High peak surge current
rating up to 10kA
Wave solderable
Standard lead form
and spacing option
•
•
-55°C to +85°C
operating temp range
Three-lead version
available for indication
purposes
Agency Approvals
Agency
Agency Approval
UL1449
QC 42201-C001,
QC 42201-A001,
IEC 60950-1 (Annex Q)
IEC 61051-1,
IEC 61051-2,
IEC 60950-1 (Annex Q)
Agency File Number
E320116
IECQ-C BSI 15.0009
40021525
Additional Information
Resources
iTMOV
Samples
iTMOV
•
•
Datasheet
TMOV
Resources
TMOV
Samples
TMOV
•
Applications
•
•
•
•
•
•
SPD Products
AC Panel Protection
Modules
AC Line Power Supplies
Surge Protected
Strip Connectors
AC Power Meters
Relocatable AC
Power Taps
•
•
•
•
•
•
GFCI
(Ground Fault
Current Interupter)
UPS
(Uninterruptable
Power Supply)
White Goods
Plug-in SPD
Inverters
AC/DC Power Supplies
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Radial Lead Varistors > TMOV
®
and iTMOV
®
Varistor Series
Metal-Oxide Varistors
(MOVs)
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
)
Transient:
Peak Pulse Current (I
TM
) -
For 8x20µs Current Wave, single pulse
Single-Pulse Energy Capability -
For 2ms Current Wave
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (αV) of Clamping Voltage (V
C
) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Thermal Protection Isolation Voltage Capability (when operated)
COATING Insulation Resistance
Indicator Lead Rating (Lead-3 - iTMOV
®
varistor only):
Continuous RMS current
Surge Current, 8/20µs
TMOV
®
and iTMOV
®
Varistor Series
115 to 750
6,000 to 10,000
35 to 480
-55 to +85
-55 to +125
<0.01
2,500
600
1,000
100
10,000
Units
V
A
J
°C
°C
%/°C
V
V
MΩ
mA
A
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.
Ratings & Specifications
TMOV
®
Varistor
Lead–free And RoHS
Compliant Models
Part
Number
TMOV14RP115E
TMOV20RP115E
TMOV14RP130E
TMOV20RP130E
TMOV14RP140E
TMOV20RP140E
TMOV14RP150E
TMOV20RP150E
TMOV14RP175E
TMOV20RP175E
TMOV14RP200E
TMOV20RP200E
TMOV14RP230E
TMOV20RP230E
TMOV14RP250E
TMOV20RP250E
TMOV14RP275E
TMOV20RP275E
TMOV14RP300E
TMOV20RP300E
TMOV14RP320E
TMOV20RP320E
TMOV14RP385E
TMOV20RP385E
TMOV14RP420E
TMOV20RP420E
TMOV14RP460E
TMOV20RP460E
TMOV14RP510E
TMOV20RP510E
TMOV14RP550E
TMOV20RP550E
iTMOV
®
Varistor
Lead–free and RoHS
Compliant Models
Part
Number
TMOV14RP115M
TMOV20RP115M
TMOV14RP130M
TMOV20RP130M
TMOV14RP140M
TMOV20RP140M
TMOV14RP150M
TMOV20RP150M
TMOV14RP175M
TMOV20RP175M
TMOV14RP200M
TMOV20RP200M
TMOV14RP230M
TMOV20RP230M
TMOV14RP250M
TMOV20RP250M
TMOV14RP275M
TMOV20RP275M
TMOV14RP300M
TMOV20RP300M
TMOV14RP320M
TMOV20RP320M
TMOV14RP385M
TMOV20RP385M
TMOV14RP420M
TMOV20RP420M
TMOV14RP460M
TMOV20RP460M
TMOV14RP510M
TMOV20RP510M
TMOV14RP550M
TMOV20RP550M
Maximum Rating (85°C)
Continuous
Transient
Disc
Diameter
AC
Volts
V
M(AC)RMS
(mm)
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
(V)
115
115
130
130
140
140
150
150
175
175
200
200
230
230
250
250
275
275
300
300
320
320
385
385
420
420
460
460
510
510
550
550
DC
Volts
V
M(DC)
(V)
150
150
170
170
180
180
200
200
225
225
260
260
300
300
320
320
350
350
385
385
420
420
505
505
560
560
610
610
670
670
715
715
Specifications (25°C)
Varistor
Maximum Typical
Voltage at Clamping Capaci-
Energy
Peak Surge
1mA Test
Voltage
tance
2ms
Current 8/20µs
Current
8/20µs
f
= 1MHz
I
TM
1 × I
TM
2 × V
N(DC)
V
N(DC)
W
TM
I
PK
C
V
C
Pulse Pulse Min Max
(J)
(A)
(A)
(V)
(V) (A)
(pF)
35
6000
4500 162 198 300 50
1100
52
10000 6500 162 198 300 100 2400
50
6000
4500 184.5 225.5 340 50
1000
100
10000 6500 184.5 225.5 340 100 1900
55
6000
4500 198 242 360 50
900
110
10000 6500 198 242 360 100
1750
60
6000
4500 216 264 395 50
800
120
10000 6500 216 264 395 100 1600
70
6000
4500 243 297 455 50
700
135
10000 6500 243 297 455 100 1400
75
6000
4500 283 345 530 50
630
154
10000 6500 283 345 530 100
1250
80
6000
4500 324 396 595 50
550
160
10000 6500 324 396 595 100
1100
100
6000
4500 351 429 650 50
500
170
10000 6500 351 429 650 100 1000
110
6000
4500 387 473 710 50
450
190
10000 6500 387 473 710 100
900
125
6000
4500 423 517 775 50
400
250
10000 6500 423 517 775 100
800
136
6000
4500 459 561 840 50
380
270
10000 6500 459 561 840 100
750
150
6000
4500 558 682 1025 50
360
300
10000 6500 558 682 1025 100
700
160
6000
4500 612 748 1120 50
300
320
10000 6500 612 748 1120 100
600
180
6000
4500 675 825 1240 50
220
360
10000 6500 675 825 1240 100
200
185
6000
4500 738 902 1355 50
200
325
10000 6500 738 902 1355 100
350
190
6000
4500 819 1001 1500 50
180
360
10000 6500 819 1001 1500 100
300
Branding
P4T115E
P2T115E
P4T130E
P2T130E
P4T140E
P2T140E
P4T150E
P2T150E
P4T175E
P2T175E
P4T200E
P2T200E
P4T230E
P2T230E
P4T250E
P2T250E
P4T275E
P2T275E
P4T300E
P2T300E
P4T320E
P2T320E
P4T385E
P2T385E
P4T420E
P2T420E
P4T460E
P2T460E
P4T510E
P2T510E
P4T550E
P2T550E
Branding
P4T115M
P2T115M
P4T130M
P2T130M
P4T140M
P2T140M
P4T150M
P2T150M
P4T175M
P2T175M
P4T200M
P2T200M
P4T230M
P2T230M
P4T250M
P2T250M
P4T275M
P2T275M
P4T300M
P2T300M
P4T320M
P2T320M
P4T385M
P2T385M
P4T420M
P2T420M
P4T460M
P2T460M
P4T510M
P2T510M
P4T550M
P2T550M
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors
(MOVs)
Radial Lead Varistors > TMOV
®
and iTMOV
®
Varistor Series
Ratings & Specifications
TMOV
®
Varistor
Lead–free And RoHS
Compliant Models
Part
Number
TMOV14RP575E
TMOV20RP575E
TMOV14RP625E
TMOV20RP625E
TMOV14RP750E
TMOV20RP750E
iTMOV
®
Varistor
Lead–free and RoHS
Compliant Models
Part
Number
TMOV14RP575M
TMOV20RP575M
TMOV14RP625M
TMOV20RP625M
TMOV14RP750M
TMOV20RP750M
Maximum Rating (85°C)
Continuous
Transient
Disc
Diameter
AC
Volts
V
M(AC)RMS
(mm)
14
20
14
20
14
20
(V)
575
575
625
625
750
750
Specifications (25°C)
Typical
Varistor Voltage
Maximum
Capaci-
at 1mA Test
Clamping
DC Energy Peak Surge
tance
Current
Voltage 8/20µs
Volts 2ms Current 8/20µs
f
= 1MHz
I
TM
1 × I
TM
2 × V
N(DC)
V
M(DC)
W
TM
Max V
C
I
PK
C
V
Pulse Pulse Min
N(DC)
(V)
(J)
(A)
(A)
(V)
(V)
(A)
(pF)
730
195
6000 4500 857
1047
1568
50
170
730
375 10000 6500 857
1047
1568
100
275
825
200
6000 4500 900
1100
1650
50
160
825
400 10000 6500 900
1100
1650
100
250
970
210
6000 4500 1080
1320
1980
50
140
970
480 10000 6500 1080
1320
1980
100
175
Branding
P4T575E
P2T575E
P4T625E
P2T625E
P4T750E
P2T750E
Branding
P4T575M
P2T575M
P4T625M
P2T625M
P4T750M
P2T750M
Thermal Characteristics
10
Current, Energy, Power Derating Curve
100
PERCENT OF RATED VALUE
Typical
5A
2.5A
0.5A
0.125A
80
60
40
20
0
-55
1
0.1
10
100
Time(s)
1000
10000
50
60
70
80
90
100
110
120
130
with appropriate enclosure design, to help facilitate SPD module
compliance to UL 1449, 3rd Edition Section 39.4 (abnormal
overvoltage limited current requirements). Under these extreme
abnormal overvoltage conditions, some units will exhibit substantial
heating, arcing and venting prior to opening. Modules should be
designed to contain this possibility. Application testing is strongly
recommended.
* Figure 4: Typical time to open circuit under UL1449
Note : The
Abnormal Overvoltage
varistors
Current Test
in conjunction
TMOV
®
and iTMOV
®
Limited
are intended,
Figure 1
Figure 2
AMBIENT TEMPERATURE (
o
C)
For applications exceeding 85°C ambient temperature, the peak
surge current and energy ratings must be reduced as shown
above.
Maximum Clamping Voltage for 14mm Parts
10000
Maximum Leakage Current
Maximum Clamping Voltage for 20mm Parts
Maximum Clamping Voltage
750V
625V
575V
550V
510V
460V
420V
385V
320V
300V
275V
10000
Maximum Clamping Voltage
Maximum Leakage Current
625V 750V
575V
550V
510V
460V
420V
385V
320V
300V
275V
Clamping Voltage (V)
1000
Clamping Voltage (V)
250V
230V
200V
175V
150V
140V
130V
115V
1000
100
0.000001 0.00001 0.0001 0.001 0.01
0.1
1
10
100
1000 10000
100
0.000001 0.00001 0.0001 0.001 0.01
250V
230V
200V
175V
150V
140V
130V
115V
0.1
1
10
100
1000 10000
Peak Current (A)
Peak Current (A)
Figure 3
Figure 6: V-I Characteristic Curves for 14mm Types
Figure 4
Figure 7: V-I Characteristic Curves for 20mm Types
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Radial Lead Varistors > TMOV
®
and iTMOV
®
Varistor Series
Metal-Oxide Varistors
(MOVs)
Repetitive Surge Capability for 14mm Parts
10000
1
2
15
10
1000
Peak Current (A)
2
Repetitive Surge Capability for 20mm Parts
10000
1
2
15
10
2
10
3
10
4
10
3
10
5
1000
Peak Current (A)
10
4
10
100
6
10
5
10
6
100
10
10
1
10
100
1000
Impulse Duration (µs)
10000
1
10
100
Impulse Duration ( s)
1000
10000
Figure 5
Figure 6
NOTE: Average power dissipation of transients should not exceed 0.6W
Figure 8: Pulse Rating Curves for 14mm types
NOTE: Average power dissipation of transients should not exceed 1.0W
Wave Solder Profile
Figure 9: Pulse Rating Curves for 20mm types
Because the TMOV
®
and iTMOV
®
varistors contain a thermal protection device, care must be taken when soldering the devices into place.
Two soldering methods are possible. Firstly, hand soldering: It is recommended to heat-sink the leads of the device. Secondly, wave solder-
ing: It is critically important that all preheat stage and the solder bath temperatures are rigidly controlled.
Non Lead–free 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 Profile
300
Maximum Wave 240C
TEMPERATURE (ºC)
Maximum Wave 260C
250
200
150
100
50
0
Figure 7
TIME(MINUTES)
Figure 8
0
0.5
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Environmental Specifications
Operating/Storage
Temperature
Humidity Aging
Thermal Shock
Solvent Resistance
Moisture Sensitivity
-55°C to +85°C
+85°C, 85% RH , 1000 hours
+/-10% typical voltage change
+85°C to -55°C 5 times
+/-10% typical voltage change
MIL–STD–202, Method 215
Level 1, J-STD-020
Lead Material
Soldering
Characteristics
Insulating Material
Device Labeling
Copper clad steel wire
Solderability per MIL–STD–202,
Method 208
Cured, flame retardant epoxy polymer
meets UL94 V–0 requirements
Marked with LF voltage, UL/CSA logos,
,
and date code
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors
(MOVs)
Radial Lead Varistors > TMOV
®
and iTMOV
®
Varistor Series
Lead Configurations
TMOV
®
Varistor
Thermal
Fuse
Element
iTMOV
®
Varistor
2
Thermal
Fuse
Element
3
Monitor Lead
To Protected Circuit
To Protected Circuit
To Protected Circuit
Line
MOV
Line Fuse
3
2
1
MOV
1
Note: MOVs are non-polarized passive elements
iTMOV Varistor
LED
Monitor Lead
R
iTMOV
®
Varistor Application Examples
Neutral
®
The application examples below show how the indicator lead on the iTMOV
1.
varistor can be used to indicate that the
Figure Application example 1
thermal element has been opened. This signifies that the circuit is no longer protected from transients by the MOV.
Line
Application Example 1
In this case, the LED is normally on, and is off when the
thermal element opens.
Line
Line Fuse
To Protected Circuit
Application Example 3
Line Fuse
iTMOV Varistor
Line
Line Fuse
Neutral
Figure 1. Application example 1
iTMOV Varistor
Line
Application Example 2
Line Fuse
LED
This circuit illustrates the use of the monitoring lead of
the iTMOV
®
varistor to ensure that equipment is only
iTMOV Varistor
R
operated when overvoltage protection
AC
present. In normal
OPTOCOUPLER
operation the load switch relay solenoid is powered via the
TO STATUS
ANNUNCIATOR
®
LIGHT/ALARM
indicator lead of the iTMOV varistor. In the event of the
Neutral
thermal element being activated, the relay will de-activate,
cutting power to the protected circuit and the fault LED will
Figure 2. Application example 2
illuminate.
Line
Line Fuse
Load Switch Relay
(loss of protection)
"Load Powered"
neon lamp
R
To Protected Circuit
LED
iTMOV Varistor
Fault LED
(Normallyoff)
R
To Protected Circuit
Neutral
Figure 3. Application example 3
This circuit utilizes an optocoupler to provide
Neutral
galvanic isolations between the iTMOV
®
varistor
Figure 1. Application example 1
and the indicating or
Varistor
circuitry.
R
iTMOV
alarm
AC OPTOCOUPLER
R
Line
Line Fuse
Neutral
Figure 2. Application example 2
iTMOV Varistor
R
AC OPTOCOUPLER
Line
Line Fuse
Neutral
Figure 2. Application example 2
iTMOV Varistor
Line
Line Fuse
Neutral
Figure 3. Application example 3
iTMOV Varistor
Fault LED
(Normallyoff)
Fault LED
(Normallyoff)
TO STATUS
ANNUNCIATOR
LIGHT/ALARM
Load Switch Relay
(loss of protection)
"Load Powered"
neon lamp
To Protected Circuit
TO STATUS
ANNUNCIATOR
LIGHT/ALARM
Please note: Indicator circuits are provided as a
guideline only. Verification of actual indicator circuitry
is the responsibility of the end user. Component
values selected must be appropriate for the specific
AC line voltage service and application.
Load Switch Relay
R
(loss of protection)
"Load Powered"
neon lamp
To Protected Circuit
To Protected Circuit
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
R
Neutral
ADI Reference Circuit
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