Varistor Products
Radial Lead Varistors > LA Series
RoHS
LA Varistor Series
Description
The LA Series of transient voltage surge suppressors are
radial leaded varistors (MOVs) that are designed to be
operated continuously across AC power lines. These UL
recognized varistors require very little mounting space,
and are offered in various standard lead form options.
The LA Series varistors are available in four model
sizes: 7mm, 10mm, 14mm and 20mm; and have a
V
M(AC)RMS
voltage range from 130V to 1000V, and an
energy absorption capability up to 360J. Some LA Series
model numbers are available with clamping voltage
selections, designated by a model number suffix of
either A or B. The 'A' selection is the standard model;
the 'B' selection provides a lower clamping voltage.
See LA Series Device Ratings and Specifications
Table for part number and brand information.
Agency Approvals
Agency
Agency File Number
Features
compliant option
available. Please see
the device and ratings
specifications table
for more information.
capability (W
TM
)
up to 360J
Absolute Maximum Ratings
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
130 to 1000
175 to 1200
V
V
42201-006
85ºC ambient
reel or bulk pack
LA Series
Units
Transients:
Peak Pulse Current (I
TM
)
μ
μs
Current Wave (W
TM
)
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (a
V
) of Clamping Voltage (V
C
) at Specified Test Current
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
1200 to 6500
11 to 360
-55 to +85
-55 to +125
<0.01
2500
1000
A
J
O
O
C
C
O
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.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
111
Revision: September 17, 2008
LA Varistor Series
LA Series
voltage range
V
M(AC)RMS
130V to 1000V
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Transient
V
RMS
V
M(AC)
(V)
130
130
130
130
130
130
140
140
140
140
150
150
150
150
150
150
175
175
175
175
230
230
230
230
250
250
250
250
250
250
275
275
275
275
275
275
300
300
300
300
300
320
320
320
320
385
385
385
112
Revision: September 17, 2008
Lead–free
and RoHS Compliant
Models
Standard
Models
Part
Number
V130LA1P
V130LA2P
V130LA5P
V130LA10AP
V130LA20AP
V130LA20BP
V140LA2P
V140LA5P
V140LA10AP
V140LA20AP
V150LA1P
V150LA2P
V150LA5P
V150LA10AP
V150LA20AP
V150LA20BP
V175LA2P
V175LA5P
V175LA10AP
V175LA20AP
V230LA4P
V230LA10P
V230LA20AP
V230LA40AP
V250LA2P
V250LA4P
V250LA10P
V250LA20AP
V250LA40AP
V250LA40BP
V275LA2P
V275LA4P
V275LA10P
V275LA20AP
V275LA40AP
V275LA40BP
V300LA2P
V300LA4P
V300LA10P
V300LA20AP
V300LA40AP
V320LA7P
V320LA10P
V320LA20AP
V320LA40BP
V385LA7P
V385LA10P
V385LA20AP
LA Varistor Series
Branding
P1301
P1302
P1305
P130L10
P130L20
P130L20B
P1402
P1405
P140L10
P140L20
P1501
P1502
P1505
P150L10
P150L20
P150L20B
P1752
P1755
P175L10
P175L20
P2304
P230L
P230L20
P230L40
P2502
P2504
P250L
P250L20
P250L40
P250L40B
P2752
P2754
P275L
P275L20
P275L40
P275L40B
P3002
P3004
P300L
P300L20
P300L40
P3207
P320L
P320L20
P320L40
P3857
P385L
P385L20
Part
Number
V130LA1
V130LA2
V130LA5
V130LA10A
130LA20A
V130LA20B
V140LA2
V140LA5
V140LA10A
V140LA20A
V150LA1
V150LA2
V150LA5
V150LA10A
V150LA20A
V150LA20B
V175LA2
V175LA5
V175LA10A
V175LA20A
V230LA4
V230LA10
V230LA20A
V230LA40A
V250LA2
V250LA4
V250LA10
V250LA20A
V250LA40A
V250LA40B
V275LA2
V275LA4
V275LA10
V275LA20A
V275LA40A
V275LA40B
V300LA2
V300LA4
V300LA10
V300LA20A
V300LA40A
V320LA7
V320LA10
V320LA20A
V320LA40B
V385LA7
V385LA10
V385LA20A
Model
Size
Disc
Dia.
(mm)
Branding
1301
1302
1305
130L10
130L20
130L20B
1402
1405
140L10
140L20
1501
1502
1505
150L10
150L20
150L20B
1752
1755
175L10
175L20
2304
230L
230L20
230L40
2502
2504
250L
250L20
250L40
250L40B
2752
2754
275L
275L20
275L40
275L40B
3002
3004
300L
300L20
300L40
3207
320L
320L20
320L40
3857
385L
385L20
7
7
10
14
20
20
7
10
14
20
7
7
10
14
20
20
7
10
14
20
7
10
14
20
7
7
10
14
20
20
7
7
10
14
20
20
7
7
10
14
20
7
10
14
20
7
10
14
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
Capaci-
Energy Peak
1mA
Voltage
tance
f
=
V
DC
10 x
Current
DC Test
8 x 20
μs
1MHz
1000μs 8 x 20μs
Current
V
V
V
M(DC)
W
TM
I
TM
I
PK
C
V
C
Min Max
(V)
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
175
11
1200
184
255
10
180
175
11
1200
184
228
340
10
180
175
20
2500
184
228
340
25
450
175
38
4500
184
228
340
50
1000
175
70
6500
184
228
340
100
175
70
6500
184
220
325
100
180
12
1200
242
360
10
160
180
22
2500
242
360
25
400
180
42
4500
242
360
50
180
75
6500
242
340
100
1750
200
13
1200
212
284
430
10
150
200
13
1200
212
268
10
150
200
25
2500
212
268
25
360
200
45
4500
212
268
50
800
200
80
6500
212
268
100
1600
200
80
6500
212
243
360
100
1600
225
15
1200
247
303
455
10
130
225
30
2500
247
303
455
25
350
225
55
4500
247
303
455
50
700
225
6500
247
303
455
100
1400
300
20
1200
324
10
100
300
35
2500
324
25
250
4500
324
50
550
300
70
300
122
6500
324
100
1100
330
21
1200
354
473
730
10
330
21
1200
354
650
10
330
40
2500
354
650
25
220
330
72
4500
354
650
50
500
330
130
6500
354
650
100
1000
330
130
6500
354
413
620
100
1000
23
1200
515
775
10
80
23
1200
473
710
10
80
45
2500
473
710
25
200
75
4500
473
710
50
450
140
6500
473
710
100
140
6500
453
680
100
405
25
1200
420
565
870
10
70
405
25
1200
420
517
775
10
70
405
46
2500
420
517
775
25
180
405
77
4500
420
517
775
50
400
405
165
6500
420
517
775
100
800
420
25
1200
462
565
850
10
65
420
48
2500
462
565
850
25
170
420
80
4500
462
565
850
50
380
420
150
6500
462
540
810
100
750
505
27
1200
558
682 1025
10
60
505
51
2500
558
682 1025
25
160
505
85
4500
558
682 1025
50
360
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications
(Continued...)
Maximum Rating (85°C)
Continuous
Transient
V
RMS
V
DC
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
Capaci-
Energy Peak
1mA
Voltage
tance
f
=
10 x
Current
DC Test
8 x 20
μs
1MHz
1000μs 8 x 20μs
Current
V
V
W
TM
I
TM
I
PK
C
V
C
Min Max
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
160
6500
558
682 1025 100
700
30
1200
610
748 1120
10
55
55
2500
610
748 1120
25
140
4500
610
748 1120
50
300
160
6500
610
720 1060 100
600
37
1200
702
858 1130
10
55
35
1200
670
825 1240
10
50
60
2500
670
825 1240
25
120
105
4500
670
825 1240
50
270
180
6500
670
1160 100
550
63
2500
735
1350
25
100
110
4500
735
1350
50
250
6500
735
860 1280 100
500
65
2500
805 1000 1500
25
120
4500
805 1000 1500
50
220
220
6500
805
1410 100
450
67
2500
1100 1650
25
80
125
4500
1100 1650
50
210
230
6500
1100 1650 100
425
75
2500
1240 1875
25
65
145
4500
1240 1875
50
260
70
140
250
220
360
6500
2500
4500
6500
4500
6500
1130
1210
1210
1100
1800
1600
1700
1820
1820
1650
2700
2420
100
25
50
100
50
100
380
70
200
400
130
250
Lead–free
and RoHS Compliant
Models
Standard
Models
Part
Number
V385LA40BP
V420LA7P
V420LA10P
V420LA20AP
V420LA40BP
V460LA7P
V480LA7P
V480LA10P
V480LA40AP
V480LA80BP
V510LA10P
V510LA40AP
V510LA80BP
V575LA10P
V575LA40AP
V575LA80BP
V625LA10P
V625LA40AP
V625LA80BP
V680LA10P
V680LA80AP
V680LA100BP
V660LA10P
V660LA50AP
V660LA100BP
V1000LA80AP
V1000LA160BP
Branding
P385L40
P4207
P420L
P420L20
P420L40
P4607
P4807
P480L
P480L40
P480L80
P510L
P510L40
P510L80
P575L
P575L40
P575L80
P625L
P625L40
P625L80
P680L
P680L80
P660L
P660L50
P660L100
P1000L8
P1000L16
Part
Number
V385LA40B
V420LA7
V420LA10
V420LA20A
V420LA40B
V460LA7
V480LA7
V480LA10
V480LA40A
V480LA80B
V510LA10
V510LA40A
V510LA80B
V575LA10
V575LA40A
V575LA80B
V625LA10
V625LA40A
V625LA80B
V680LA10
V680LA80A
Model
Size
Disc
Dia.
(mm)
Branding
385L40
4207
420L
420L20
420L40
4607
4807
480L
480L40
480L80
510L
510L40
510L80
575L
575L40
575L80
625L
625L40
625L80
680L
680L80
680L100
20
7
10
14
20
7
7
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
14
20
V
M(AC)
V
M(DC)
(V)
385
420
420
420
420
460
480
480
480
480
510
510
510
575
575
575
625
625
625
680
680
680
(V)
505
560
560
560
560
615
640
640
640
640
675
675
675
730
730
730
825
825
825
875
875
875
P680L100 V680LA100B
V660LA10
660L
V660LA50A
660L50
V660LA100B
660L100
V1000LA80A
1000L80
V1000LA160B 1000L160
660 850
660 850
660 850
1000 1200
1000 1200
1425
1425
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
113
Revision: September 17, 2008
LA Varistor Series
LA Series
Varistor Products
Radial Lead Varistors > LA Series
Power Dissipation Ratings
Should transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Specifications Table for the specific
device.The operating values of a MOV need to be derated
at high temperatures as shown above. Because varistors
only dissipate a relatively small amount of average power
they are not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
Current Energy and Power Derating Curve
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
100
90
50
10
O
1
T
T
1
T
2
TIME
100
PERCENT OF RATED VALUE
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110
120
130
140 150
0
1
= Virtual Origin of Wave
T
1
= Rise Time = 1.25 x T
T
2
= Decay Time
Example
μs
Current Waveform:
8μs = T
1
= Rise Time
20μs = T
2
= Decay Time
AMBIENT TEMPERATURE (
o
C)
FIGURE 1
LA Varistor Series
114
Revision: September 17, 2008
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Transient V-I Characteristics Curves
Maximum Clamping Voltage for 7mm Parts
6,000
5,000
4,000
3,000
Pulse Rating Curves
Repetitive Surge Capability for 7mm Parts
2,000
MAXIMUM PEAK VOLTS (V)
SURGE CURRENT (A)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
1,000
500
200
100
50
20
10
5
1
2
10
10
2
MODEL SIZE 7mm
V130LA1(P) - V480LA7(P)
10
3
10
4
10
5
10
6
2,000
V275LA2(P)
V250LA2(P)
1,000
900
800
700
600
500
400
300
V130LA1(P)
200
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
V300LA2(P)
INDEFINITE
V150LA1(P)
2
1
20
100
1,000
IMPULSE DURATION (
μs)
10,000
PEAK AMPERES (A)
FIGURE 14. SURGE CURRENT RATING CURVES FOR
4,000
3,000
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
MAXIMUM PEAK VOLTS (V)
1,000
900
800
700
600
500
400
300
200
V175LA2(P)
V150LA2(P)
V140LA2(P)
V130LA2(P)
10
-2
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
10
4
100
10
-3
MAXIMUM PEAK VOLTS (V)
MAXIMUM CLAMPING VOLTAGE
5,000 MODEL SIZE 7mm
320 TO 480V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
3,000
V460LA7
(P)
V480LA7
(P)
2,000
1,000
V420LA7
(P)
V385LA7
(P)
V320LA7
(P)
500
10
-3
10
-2
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
10
4
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
115
Revision: September 17, 2008
LA Varistor Series
LA Series
Real-time operating system RTOS
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