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Varistor Products
Line Voltage Operation, Radial Lead
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LA Varistor Series
The LA Series of transient voltage surge suppressors are radial-lead
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 VM(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 Aselection is
the standard model; the Bselection provides a lower clamping voltage.
See LA Series Device Ratings and Specifications table for part number
and brand information.
Features
Energy Absorption Capability (WTM) . . .. . . . . . . . . . . . . . . . . Up to 360J
Wide Operating Voltage Range
VM(AC)RMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130V to 1000V
No Derating Up to 85oC Ambient
Available in Tape and Reel or Bulk Pack
AGENCY APPROVALS: Recognized under the components program of
Underwriters Laboratories. Certified by CSA, VDE and CECC.
AGENCY FILE NUMBERS: UL E75961, E56529, E135010; CSA
LR91788; VDE 116895E; CECC 42201-006.
ALSO SEE LITTELFUSE ULTRAMOV
AND C-III VARISTOR SERIES
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DVE
®
®
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Varistor Products
Line Voltage Operation, Radial Lead
LA Varistor Series
Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous:
LA SERIES
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 1000
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 1200
Transients:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200 to 6500
Single Pulse Energy Range
For 10/1000µs Current Wave (WTM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 to 360
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000
UNITS
V
V
A
J
0C
0C
%/0C
V
M
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.
2
Device Ratings and Specifications
PART
NUMBER
V130LA1
V130LA2
V130LA5
V130LA10A
V130LA20A
V130LA20B
V140LA2
V140LA5
V140LA10A
V140LA20A
V150LA1
V150LA2
V150LA5
V150LA10A
V150LA20A
V150LA20B
V175LA2
V175LA5
V175LA10A
V175LA20A
V230LA4
V230LA10
V230LA20A
V230LA40A
MODEL
SIZE
DISC
DIA.
(mm)
7
7
10
14
20
20
7
10
14
20
7
7
10
14
20
20
7
10
14
20
7
10
14
20
DEVICE
MODEL
NUMBER
BRAND-
ING
1301
1302
1305
130L10
130L20
130L20B
1402
1405
140L10
140L20
1501
1502
1505
150L10
150L20
150L20B
1752
1755
175L10
175L20
2304
230L
230L20
230L40
MAXIMUM RATING (85 oC)
CONTINUOUS
TRANSIENT
VRMS
PEAK
ENERGY CURRENT
VDC 10 x 1000µs 8 x 20µs
VM(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
VM(DC)
(V)
175
175
175
175
175
175
180
180
180
180
200
200
200
200
200
200
225
225
225
225
300
300
300
300
WTM
(J)
11
11
20
38
70
70
12
22
42
75
13
13
25
45
80
80
15
30
55
90
20
35
70
122
ITM
(A)
1200
1200
2500
4500
6500
6500
1200
2500
4500
6500
1200
1200
2500
4500
6500
6500
1200
2500
4500
6500
1200
2500
4500
6500
SPECIFICATIONS (25oC)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
184 255
184 228
184 228
184 228
184 228
184 220
198 242
198 242
198 242
198 242
212 284
212 268
212 268
212 268
212 268
212 243
247 303
247 303
247 303
247 303
324 396
324 396
324 396
324 396
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC IPK
(V) (A)
390 10
340 10
340 25
340 50
340 100
325 100
360 10
360 25
360 50
340 100
430 10
395 10
395 25
395 50
395 100
360 100
455 10
455 25
455 50
455 100
595 10
595 25
595 50
595 100
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
180
180
450
1000
1900
1900
160
400
900
1750
150
150
360
800
1600
1600
130
350
700
1400
100
250
550
1100
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Varistor Products
Line Voltage Operation, Radial Lead
LA Varistor Series
Device Ratings and Specifications (Continued)
PART
NUMBER
V250LA2
V250LA4
V250LA10
V250LA20A
V250LA40A
V250LA40B
V275LA2
V275LA4
V275LA10
V275LA20A
V275LA40A
V275LA40B
V300LA2
V300LA4
V300LA10
V300LA20A
V300LA40A
V320LA7
V320LA10
V320LA20A
V320LA40B
V385LA7
V385LA10
V385LA20A
V385LA40B
V420LA7
V420LA10
V420LA20A
V420LA40B
V460LA7
V480LA7
V480LA10
V480LA40A
V480LA80B
V510LA10
V510LA40A
V510LA80B
V575LA10
V575LA40A
V575LA80B
V625LA10
V625LA40A
V625LA80B
MODEL
SIZE
DISC
DIA.
(mm)
7
7
10
14
20
20
7
7
10
14
20
20
7
7
10
14
20
7
10
14
20
7
10
14
20
7
10
14
20
7
7
10
14
20
10
14
20
10
14
20
10
14
20
DEVICE
MODEL
NUMBER
BRAND-
ING
2502
2504
250L
250L20
250L40
250L40B
2752
2754
275L
275L20
275L40
275L40B
3002
3004
300L
300L20
300L40
3207
320L
320L20
320L40
3857
385L
385L20
385L40
4207
420L
420L20
420L40
4607
4807
480L
480L40
480L80
510L
510L40
510L80
575L
575L40
575L80
625L
625L40
625L80
MAXIMUM RATING (85 oC)
CONTINUOUS
TRANSIENT
VRMS
PEAK
ENERGY CURRENT
VDC 10 x 1000µs 8 x 20µs
VM(AC)
(V)
250
250
250
250
250
250
275
275
275
275
275
275
300
300
300
300
300
320
320
320
320
385
385
385
385
420
420
420
420
460
480
480
480
480
510
510
510
575
575
575
625
625
625
VM(DC)
(V)
330
330
330
330
330
330
369
369
369
369
369
369
405
405
405
405
405
420
420
420
420
505
505
505
505
560
560
560
560
615
640
640
640
640
675
675
675
730
730
730
825
825
825
WTM
(J)
21
21
40
72
130
130
23
23
45
75
140
140
25
25
46
77
165
25
48
80
150
27
51
85
160
30
55
90
160
37
35
60
105
180
63
110
190
65
120
220
67
125
230
ITM
(A)
1200
1200
2500
4500
6500
6500
1200
1200
2500
4500
6500
6500
1200
1200
2500
4500
6500
1200
2500
4500
6500
1200
2500
4500
6500
1200
2500
4500
6500
1200
1200
2500
4500
6500
2500
4500
6500
2500
4500
6500
2500
4500
6500
SPECIFICATIONS (25oC)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
354 473
354 429
354 429
354 429
354 429
354 413
389 515
389 473
389 473
389 473
389 473
389 453
420 565
420 517
420 517
420 517
420 517
462 565
462 565
462 565
462 540
558 682
558 682
558 682
558 682
610 748
610 748
610 748
610 720
702 858
670 825
670 825
670 825
670 790
735 910
735 910
735 860
805 1000
805 1000
805 960
900 1100
900 1100
900 1100
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC
(V)
730
650
650
650
650
620
775
710
710
710
710
680
870
775
775
775
775
850
850
850
810
1025
1025
1025
1025
1120
1120
1120
1060
1130
1240
1240
1240
1160
1350
1350
1280
1500
1500
1410
1650
1650
1650
IPK
(A)
10
10
25
50
100
100
10
10
25
50
100
100
10
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
10
25
50
100
25
50
100
25
50
100
25
50
100
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
90
90
220
500
1000
1000
80
80
200
450
900
900
70
70
180
400
800
65
170
380
750
60
160
360
700
55
140
300
600
55
50
120
270
550
100
250
500
90
220
450
80
210
425
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Varistor Products
Line Voltage Operation, Radial Lead
LA Varistor Series
Device Ratings and Specifications (Continued)
MAXIMUM RATING (85 oC)
SPECIFICATIONS (25oC)
PART
NUMBER
MODEL
SIZE
DISC
DIA.
(mm)
DEVICE
MODEL
NUMBER
BRAND-
ING
CONTINUOUS
VRMS
VDC
TRANSIENT
PEAK
ENERGY CURRENT
10 x 1000µs 8 x 20µs
VM(AC) VM(DC)
(V) (V)
WTM
(J)
ITM
(A)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC IPK
(V) (A)
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
V660LA10
10 660L
660 850
70
2500
940 1250 1650 25
70
V660LA50A
14 660L50
660 850
140
4500
940 1250 1650 50
200
V660LA100B
20 660L100 660 850
250
6500
940 1250 1650 100
400
V1000LA80A
14 1000L80
1000 1200
220
4500
1425 1800 2700 50
130
V1000LA160B
20 1000L160 1000 1200
360
6500
1425 1600 2420 100
250
NOTE: Average power dissipation of transients not to exceed 0.25W, 0.4W, 0.6W or 1W for model sizes 7mm, 10mm, 14mm and 20mm, respectively.
2
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 in Figure 1. 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.
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE ( oC)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
100
90
50
10
O1
T
T1
T2
TIME
O1 = Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T1 = Virtual Front time = 1.25 • t
T2 = Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8µs = T1 = Virtual Front Time
20µs = T2 = Virtual Time to Half Value
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
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Line Voltage Operation, Radial Lead
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LA Varistor Series
Transient V-I Characteristics Curves
6,000
5,000
4,000
3,000
MAXIMUM CLAMPINGVOLTAGE
MODEL SIZE 7mm
1TA30=T-O553o0C0VTOM(8A5Co) CRATING
2,000
V275LA2
V250LA2
1,000
900
800
700
600
500
V300LA2
400 V150LA1
300
V130LA1
200
10-3
10-2
10-1
100 101
102 103
104
PEAK AMPERES (A)
FIGURE 3. CLAMPINGVOLTAGE FOR V130LA1 - V300LA2
4,000
3,000
2,000
1,000
900
800
700
600
500
400
MAXIMUM CLAMPINGVOLTAGE
MODEL SIZE 7mm
T1A30=T-O553o0C0VTOM(8A5Co) CRATING V300LA4
V275LA4
V250LA4
V230LA4
300
200
V175LA2
V150LA2
V140LA2
V130LA2
100
10-3
10-2
10-1
100
101 102 103
PEAK AMPERES (A)
104
FIGURE 4. CLAMPINGVOLTAGE FOR V130LA2 - V300LA4
MAXIMUM CLAMPINGVOLTAGE
5,000 MODEL SIZE 7mm
3T2A0=T-O554o8C0VTMO(A8C5o) CRATING
3,000
2,000
V460LA7
V480LA7
1,000
500
V420LA7
V385LA7
V320LA7
10-3 10-2 10-1 100 101 102 103
PEAK AMPERES (A)
104
FIGURE 5. CLAMPINGVOLTAGE FOR V320LA7 - V480LA7
6,000
5,000
4,000
3,000
MAXIMUM CLAMPINGVOLTAGE
MODEL SIZE 10mm
130 TO 420VM(AC) RATING
TA = -55oC TO 85oC
2,000
1,000
900
800
700
600
500
400
V420LA10
V175LA5
300
200
10-3
10-2
V275LA10
V250LA10
V230LA10
V150LA5
V140LA5
V130LA5
10-1 100 101 102
PEAK AMPERES (A)
103 104
FIGURE 6. CLAMPINGVOLTAGE FOR V130LA5 - V420LA10
MAXIMUM CLAMPINGVOLTAGE
5,000 MODEL SIZE 10mm
3T0A0=T-O556o6C0VTMO(A8C5o) CRATING
3,000
V625LA10
V660LA10
2,000 V300LA10
V320LA10
1,000
500
V575LA10
V510LA10
V480LA10
V385LA10
10-3 10-2 10-1 100 101 102 103 104
PEAK AMPERES (A)
6,000
5,000
4,000
3,000
MAXIMUM CLAMPINGVOLTAGE
MODEL SIZE 14mm
T1A30=T-O553o2C0VTOM(8A5Co) CRATING
2,000
1,000
900
800
700
600
500
V300LA20A
V320LA20A
V275LA20A
V250LA20A
V230LA20A
400 V175LA10A
300
200
10-3
10-2
V150LA10A
V140LA10A
V130LA10A
10-1
100 101
102 103
104
PEAK AMPERES (A)
FIGURE 7. CLAMPINGVOLTAGE FOR V300LA10 - V660LA10
FIGURE 8. CLAMPINGVOLTAGE FOR V130LA10A - V320LA20A
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