Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV 34S Series
®
RoHS
TMOV
®
34S Varistor Series
Description
The Littelfuse TMOV
®
34S thermally protected varistor
series consists of a 34mm square format varistor element
(MOV) with an integral thermally activated element. This
element is designed to open in the event of overheating
due to abnormal overvoltage, limited current conditions.
Certain TMOV
®
34S devices are offered with a "monitor"
lead which may be connected to signalling circuity to
indicate if the MOV has been disconnected from the circuit.
TMOV
®
34S Series devices 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 discreet solutions resulting
in improved clamping performance to fast over voltage
transients.
Status
Agency Approvals
Agency
Agency File Number
Features
protected MOV–
Patent # 6636403
rating to 40 kA
operating temp
Lead–free Available
available with
narrow 3mm wide
monitor (right) lead
available with 2 leads
only (no monitor lead)
Power Supply)
Modules
Supplies
©2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Revision: July 5, 2012
TMOV
®
34S Varistor Series
HI–ENERGY MOV’S
TMOV
®
34S Series
Applications
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV 34S Series
®
Absolute Maximum Ratings
Continuous
Steady State Applied Voltage:
)
Transients:
TM
TMOV34S Series
Units
V
)
up to 40,000
A
J
μs
Current Wave, single pulse
)
A
STG
)
V
MΩ
Temperature Coefficient (a
V
) of Clamping Voltage (V
C
) at Specified Test Current
* Contact your Littelfuse product representative to discuss alternatives and for additional information.
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
TMOV
®
34S Varistor Series
Revision: July 5, 2012
©2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV 34S Series
®
TMOV
®
34S Series Ratings & Specifications - Standard 3 Lead Design
Maximum Rating (85°C)
Lead–free and
RoHS Compliant
Models
Continuous
AC
Volts
Branding
V
(V)
DC
Volts
V
M(AC)
MCOV
Surge
Arrester
V
(V)
Transient
Energy
2ms
W
TM
1 x Pulse
(J)
Peak
Current
8 x 20μs
I
TM
Min
V
1 x Pulse
(A)
(V)
40000
40000
340
200
240
200
330
234
300
320
330
460
400
420
640
360
400
430
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
420
460
640
434
40000
40000
40000
40000
40000
40000
620
660
40000
2200
642
3300
3000
433
462
Specifications (25°C)
Maximum
Typical
Varistor Voltage
Clamping Volt V
C
Capaci-
at 1mA
at 200A Current tance
f
=
Test Current
(8/20μs)
1MHz
V
Max
(V)
202
V
C
(V)
C
(pF)
Part Number
40000
40000
2000
©2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Revision: July 5, 2012
TMOV
®
34S Varistor Series
HI–ENERGY MOV’S
TMOV
®
34S Series
40000
2000
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV 34S Series
®
TMOV
®
34S Series Ratings & Specifications - Alternative 2 Lead Design
Maximum Rating (85°C)
Lead–free
and RoHS
Compliant
Models
Continuous
AC
Volts
Branding
V
(V)
DC
Volts
V
M(AC)
MCOV
Surge
Arrester
V
(V)
Transient
Energy
2ms
W
TM
1 x Pulse
(J)
Peak
Current
8 x 20
μs
I
TM
1 x Pulse
(A)
40000
40000
340
200
240
200
330
234
300
320
330
460
400
420
640
360
400
430
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
420
460
640
434
40000
40000
40000
40000
40000
40000
620
660
40000
40000
40000
40000
2000
2000
2200
642
3300
3000
433
462
Specifications (25°C)
Maximum
Typical
Varistor Voltage
Clamping Volt V
C
Capaci-
at 1mA
at 200A Current tance
f
=
Test Current
(8/20μs)
1MHz
V
Min
(V)
V
Max
(V)
202
V
C
(V)
C
(pF)
Part Number
TMOV
®
34S Varistor Series
Revision: July 5, 2012
©2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV 34S Series
®
Typical time to open circuit under UL1449 Abnormal
Overvoltage Limited Current Test
10
Typical
5A
2.5A
0.5A
0.125A
Peak Current & Energy Derating Curve
100
PERCENT OF RATED VALUE
80
60
1
40
20
0
0.1
10
100
Time s
®
-55
50
60
1000
1000
Figure 2
70
80
90
100
AMBIENT TEMPERATURE (ºC)
110
120
130
Figure 1
Series TMOV
®
34S devices
are intended, in conjunction with appropriate enclosure
surge current and energy ratings must be reduced as shown.
Pulse Rating Curve
50,000
1
20,000
10,000
5,000
2
15
10
2
10
3
10
4
10
5
Hx34
SURGE CURRENT (A)
overvoltage conditions, the units will exhibit substantial
heating and potential venting prior to opening. Modules
should be designed to contain this possibility. Application
testing is strongly recommended.
2,000
1,000
500
200
100
50
20
10
10
6
INDEFINITE
20
100
1,000
IMPULSE DURATION ( μs)
10,000
Figure 3
10000
Maximum Clamping Voltage
TMOV34S series
TA = -55 C to 85C
Voltage -
VOLTS
V511
V551
V571
V751
V661
V681
1000
V481
V141 V131
V461
V421
V151
100
1mA
10mA
100mA
1A
10A
100A
1000A
10000A
100000A
V111
Figure 4
Current - AMPS
V391
V351 V331 V321 V301 V271
V251 V201 V181
©2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Revision: July 5, 2012
TMOV
®
34S Varistor Series
HI–ENERGY MOV’S
TMOV
®
34S Series
V–I Characteristic Curves for TMOV
®
34S Varistor