2
VARISTOR
PRODUCTS
Varistor Products
67 www.littelfuse.com
LA Varistor Series
Line Voltage Operation, Radial Lead
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 “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.
Features
•Energy Absorption Capability (WTM) . ... ................Up to 360J
•Wide Operating Voltage Range
VM(AC)RMS .....................................130V to 1000V
•No Derating Up to 85oCAmbient
•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
®
®
V
DE
Varistor Products
68
www.littelfuse.com
LA Varistor Series
Line Voltage Operation, Radial Lead
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 (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 1000 V
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 1200 V
Transients:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200 to 6500 A
Single Pulse Energy Range
For 10/1000µs Current Wave (WTM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 to 360 J
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 0C
Storage Temperature Range (TSTG)....................................................................-55 to 125 0C
Temperature Coefficient (αV) of Clamping Voltage (VC)at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 %/0C
Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 V
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 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 anyother conditions abovethose indicated in the operational sections of this specification is not implied.
Device Ratings and Specifications
PART
NUMBER
MODEL 
SIZE 
DISC 
DIA.
(mm)
DEVICE 
MODEL 
NUMBER 
BRAND-
ING
MAXIMUM RATING (85
o
C) SPECIFICATIONS (25
o
C)
CONTINUOUS TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM 
CLAMPING 
VOLTAGE
8 x 20µs
TYPICAL
CAPACI-
TANCE
f = 1MHzV
RMS
V
DC
ENERGY 
10 x1000µs
PEAK
CURRENT 
8 x 20µs
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM 
MIN
V
NOM
MAX V
C
I
PK
C
(V) (V) (J) (A) (V) (V) (A) (pF)
V130LA1 7 1301 130 175 11 1200 184 255 390 10 180
V130LA2 7 1302 130 175 11 1200 184 228 340 10 180
V130LA5 10 1305 130 175 20 2500 184 228 340 25 450
V130LA10A 14 130L10 130 175 38 4500 184 228 340 50 1000
V130LA20A 20 130L20 130 175 70 6500 184 228 340 100 1900
V130LA20B 20 130L20B 130 175 70 6500 184 220 325 100 1900
V140LA2 7 1402 140 180 12 1200 198 242 360 10 160
V140LA5 10 1405 140 180 22 2500 198 242 360 25 400
V140LA10A 14 140L10 140 180 42 4500 198 242 360 50 900
V140LA20A 20 140L20 140 180 75 6500 198 242 340 100 1750
V150LA1 7 1501 150 200 13 1200 212 284 430 10 150
V150LA2 7 1502 150 200 13 1200 212 268 395 10 150
V150LA5 10 1505 150 200 25 2500 212 268 395 25 360
V150LA10A 14 150L10 150 200 45 4500 212 268 395 50 800
V150LA20A 20 150L20 150 200 80 6500 212 268 395 100 1600
V150LA20B 20 150L20B 150 200 80 6500 212 243 360 100 1600
V175LA2 7 1752 175 225 15 1200 247 303 455 10 130
V175LA5 10 1755 175 225 30 2500 247 303 455 25 350
V175LA10A 14 175L10 175 225 55 4500 247 303 455 50 700
V175LA20A 20 175L20 175 225 90 6500 247 303 455 100 1400
V230LA4 7 2304 230 300 20 1200 324 396 595 10 100
V230LA10 10 230L 230 300 35 2500 324 396 595 25 250
V230LA20A 14 230L20 230 300 70 4500 324 396 595 50 550
V230LA40A 20 230L40 230 300 122 6500 324 396 595 100 1100
LA SERIES UNITS
2
VARISTOR
PRODUCTS
Varistor Products
69 www.littelfuse.com
Line Voltage Operation, Radial Lead
LA Varistor Series
Device Ratings and Specifications (Continued)
V250LA2 7 2502 250 330 21 1200 354 473 730 10 90
V250LA4 7 2504 250 330 21 1200 354 429 650 10 90
V250LA10 10 250L 250 330 40 2500 354 429 650 25 220
V250LA20A 14 250L20 250 330 72 4500 354 429 650 50 500
V250LA40A 20 250L40 250 330 130 6500 354 429 650 100 1000
V250LA40B 20 250L40B 250 330 130 6500 354 413 620 100 1000
V275LA2 7 2752 275 369 23 1200 389 515 775 10 80
V275LA4 7 2754 275 369 23 1200 389 473 710 10 80
V275LA10 10 275L 275 369 45 2500 389 473 710 25 200
V275LA20A 14 275L20 275 369 75 4500 389 473 710 50 450
V275LA40A 20 275L40 275 369 140 6500 389 473 710 100 900
V275LA40B 20 275L40B 275 369 140 6500 389 453 680 100 900
V300LA2 7 3002 300 405 25 1200 420 565 870 10 70
V300LA4 7 3004 300 405 25 1200 420 517 775 10 70
V300LA10 10 300L 300 405 46 2500 420 517 775 25 180
V300LA20A 14 300L20 300 405 77 4500 420 517 775 50 400
V300LA40A 20 300L40 300 405 165 6500 420 517 775 100 800
V320LA7 7 3207 320 420 25 1200 462 565 850 10 65
V320LA10 10 320L 320 420 48 2500 462 565 850 25 170
V320LA20A 14 320L20 320 420 80 4500 462 565 850 50 380
V320LA40B 20 320L40 320 420 150 6500 462 540 810 100 750
V385LA7 7 3857 385 505 27 1200 558 682 1025 10 60
V385LA10 10 385L 385 505 51 2500 558 682 1025 25 160
V385LA20A 14 385L20 385 505 85 4500 558 682 1025 50 360
V385LA40B 20 385L40 385 505 160 6500 558 682 1025 100 700
V420LA7 7 4207 420 560 30 1200 610 748 1120 10 55
V420LA10 10 420L 420 560 55 2500 610 748 1120 25 140
V420LA20A 14 420L20 420 560 90 4500 610 748 1120 50 300
V420LA40B 20 420L40 420 560 160 6500 610 720 1060 100 600
V460LA7 7 4607 460 615 37 1200 702 858 1130 10 55
V480LA7 7 4807 480 640 35 1200 670 825 1240 10 50
V480LA10 10 480L 480 640 60 2500 670 825 1240 25 120
V480LA40A 14 480L40 480 640 105 4500 670 825 1240 50 270
V480LA80B 20 480L80 480 640 180 6500 670 790 1160 100 550
V510LA10 10 510L 510 675 63 2500 735 910 1350 25 100
V510LA40A 14 510L40 510 675 110 4500 735 910 1350 50 250
V510LA80B 20 510L80 510 675 190 6500 735 860 1280 100 500
V575LA10 10 575L 575 730 65 2500 805 1000 1500 25 90
V575LA40A 14 575L40 575 730 120 4500 805 1000 1500 50 220
V575LA80B 20 575L80 575 730 220 6500 805 960 1410 100 450
V625LA10 10 625L 625 825 67 2500 900 1100 1650 25 80
V625LA40A 14 625L40 625 825 125 4500 900 1100 1650 50 210
V625LA80B 20 625L80 625 825 230 6500 900 1100 1650 100 425
PART
NUMBER
MODEL
SIZE
DISC
DIA.
(mm)
DEVICE
MODEL
NUMBER
BRAND-
ING
MAXIMUM RATING (85
o
C) SPECIFICATIONS (25
o
C)
CONTINUOUS TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
TYPICAL
CAPACI-
TANCE
f = 1MHzV
RMS
V
DC
ENERGY
10 x 1000µs
PEAK
CURRENT
8 x 20µs
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM
MIN
V
NOM
MAX V
C
I
PK
C
(V) (V) (J) (A) (V) (V) (A) (pF)
Varistor Products
70
www.littelfuse.com
LA Varistor Series
Line Voltage Operation, Radial Lead
Device Ratings and Specifications (Continued)
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 theyare not suitable for repetitive applications
that involve substantial amounts of average power dissipation.
V660LA10 10 660L 660 850 70 2500 940 1210 1820 25 70
V660LA50A 14 660L50 660 850 140 4500 940 1210 1820 50 200
V660LA100B 20 660L100 660 850 250 6500 940 1100 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.
PART
NUMBER
MODEL
SIZE
DISC
DIA.
(mm)
DEVICE
MODEL
NUMBER
BRAND-
ING
MAXIMUM RATING (85
o
C) SPECIFICATIONS (25
o
C)
CONTINUOUS TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
TYPICAL
CAPACI-
TANCE
f = 1MHzV
RMS
V
DC
ENERGY
10 x 1000µs
PEAK
CURRENT
8 x 20µs
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM
MIN
V
NOM
MAX V
C
I
PK
C
(V) (V) (J) (A) (V) (V) (A) (pF)
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE (
o
C)
PERCENT OF RATED VALUE
FIGURE 1. CURRENT, ENERGY AND POWER DERATING 
CURVE
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK VALUE
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front time = 1.25 • t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8µs = T
1
= Virtual Front Time
20µs = T
2
= Virtual Time to Half Value
2
VARISTOR
PRODUCTS
Varistor Products
71 www.littelfuse.com
Line Voltage Operation, Radial Lead
LA Varistor Series
Transient V-I Characteristics Curves
Transient  V-I Characteristics Curves 
FIGURE 3. CLAMPING VOLTAGE FOR V130LA1 - V300LA2 FIGURE 4. CLAMPING VOLTAGE FOR V130LA2 - V300LA4
FIGURE 5. CLAMPING VOLTAGE FOR V320LA7 - V480LA7 FIGURE 6. CLAMPING VOLTAGE FOR V130LA5 - V420LA10
FIGURE 7. CLAMPING VOLTAGE FOR V300LA10 - V660LA10 FIGURE 8. CLAMPING VOLTAGE FOR V130LA10A - V320LA20A
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V150LA1
V130LA1
V300LA2
V275LA2
V250LA2
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
10
3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
CV300LA4
V275LA4
V250LA4
V230LA4
V130LA2
V140LA2
V150LA2
V175LA2
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
T
A
= -55
o
C TO 85
o
C
320 TO 480V
M(AC)
RATING
V420LA7
V385LA7
V320LA7
V460LA7
V480LA7
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
10
3
5,000
3,000
2,000
1,000
500
PEAK AMPERES (A)
MAXIMUM PEAKVOLTS (V)
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V275LA10
V250LA10
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
130 TO 420V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V230LA10
V420LA10
V175LA5
V130LA5
V140LA5
V150LA5
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
10
3
5,000
3,000
2,000
1,000
500
V575LA10
V510LA10
V480LA10
V385LA10
V300LA10
V320LA10
PEAK AMPERES (A)
V625LA10
V660LA10
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
T
A
= -55
o
C TO 85
o
C
300 TO 660V
M(AC)
RATING
MAXIMUM PEAKVOLTS (V)
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V275LA20A
V250LA20A
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
130 TO 320V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V230LA20A
V175LA10A
V130LA10A
V140LA10A
V150LA10A
V320LA20A
V300LA20A
Varistor Products
72
www.littelfuse.com
LA Varistor Series
Line Voltage Operation, Radial Lead
FIGURE 9. CLAMPING VOLTAGE FOR V385LA20A -
V1000LA80A
FIGURE 10. CLAMPING VOLTAGE FOR V130LA20A - V275LA40A
FIGURE 11. CLAMPING VOLTAGE FOR V130LA20B - V275LA40B FI G URE 1 2. CLAMPING VOLTAGE FOR V140LA20A - V230LA40A
FIGURE 13. CLAMPING VOLTAGE FOR V300LA40A - V1000LA160B
5,000
3,000
1,000
500
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
2,000
10
3
10
-4
V1000LA80A
V660LA50A
V575LA40A
V510LA40A
V480LA40A
V420LA20A
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
385 TO 1000V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V385LA20A
700
V625LA40A
3,000
2,000
1,000
900
800
700
600
500
400
300
200
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
10
3
V275LA40A
V250LA40A
V150LA20A
V130LA20A
V175LA20A
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
3,000
2,000
1,000
900
800
700
600
500
400
300
200
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
10
3
V275LA40B
V250LA40B
V130LA20B
V150LA20B
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
3,000
2,000
500
200
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
1,000
10
3
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
140 TO 230V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
300
V140LA20A
V230LA40A
5,000
3,000
1,000
500
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAKVOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V625LA80B
V660LA100B
V1000LA160B
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
300 TO 1000V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V575LA80B
V420LA40B
V385LA40B
V320LA40B
V300LA40A
V510LA80B
V480LA80B
Transient V-I Characteristics Curves (Continued)
2
VARISTOR
PRODUCTS
Varistor Products
73 www.littelfuse.com
Line Voltage Operation, Radial Lead
LA Varistor Series
Pulse Rating Curves
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V130LA1 - V480LA7
FIGURE 15. SURGE CURRENT RATING CURVES FOR 
V130LA5 - V660LA10
FIGURE 16. SURGE CURRENT RATING CURVES FOR
V130LA10A - V320LA20A
FIGURE 17. SURGE CURRENT RATING CURVES FOR 
V385LA20A - V1000LA80A
FIGURE 18. SURGE CURRENT RATING CURVES FOR
V130LA20A - V320LA40B
FIGURE 19. SURGE CURRENT RATING CURVES FOR 
V385LA40B - V1000LA160B
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION ( µs)
SURGE CURRENT (A)
1
2
10
10
2
10
4
10
5
10
6
MODEL SIZE 7mm
V130LA1 - V480LA7
10
3
INDEFINITE
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION ( µs)
SURGE CURRENT (A)
1
2
10 10
4
10
5
10
6
MODEL SIZE 10mm
V130LA5 - V660LA10
10
3
INDEFINITE
1,000 10
2
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION ( µs)
SURGE CURRENT (A)
1
2
10
10
4
10
5
10
6
MODEL SIZE 14mm
V130LA10A - V320LA20A
10
3
INDEFINITE
1,000 10
2
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION ( µs)
SURGE CURRENT (A)
1
2
10
10
4
10
5
10
6
MODEL SIZE 14mm
V385LA20A - V1000LA80A
10
3
INDEFINITE
1,000 10
2
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (µs)
SURGE CURRENT (A)
12
10
4
10
5
10
6
MODEL SIZE 20mm
V130LA20A - V320LA40B
10
3
INDEFINITE
1,000
10
2
10
5,000
1
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (µs)
SURGE CURRENT (A)
12
10
4
10
5
10
6
MODEL SIZE 20mm
V385LA40B - V1000LA160B
10
3
INDEFINITE
1,000
10
2
10
5,000
1
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than ±10% could result. This type of shift, which normally results in a decrease of VN(DC),
may result in the device not meeting the original published specifications, but does not prevent the device from continuing to function, and to provide ample protection.
Varistor Products
74
www.littelfuse.com
Line Voltage Operation, Radial Lead
Tape and Reel Specifications
Crimped Leads "LT" Crimped Leads "LT"
Straight Leads "LS"
Straight Leads "LS"
Under-crimped Leads "LU"
P1
P0
E
DP
DHDH
W1
W
Ft
W2W0
P
DP
C
∆b
H
0
∆D0
H
1SEATING
PLANE
P2
P1
P1
W0
E
DP
DH DH
W1
W
Ft
W2
P
DP
C
∆b
H
0
∆D0
H
1SEATING
PLANE
P2
P0
DH
E
DH
DP
W1
W
Ft
W2
P
DP
∆b
H
∆D0
H
1
P1
P2
W0
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
∆b
H
∆D0
H
1
U
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
∆b
Ho
∆D0
H
1
Under-crimped Leads "LU"
P0
U
DH
E
DH
DP
W1
W
Ft
W2
P
DP
∆b
Ho
∆D0
H
1
P2
W0
P1
7mm Devices 10, 14 and 20mm Devices
LA Varistor Series
2
VARISTOR
PRODUCTS
Varistor Products
75 www.littelfuse.com
SYMBOL PARAMETER
MODEL SIZE
7mm 10mm 14mm 20mm
P Pitch of Component 12.7 ±1.0 25.4 ±1.0 25.4 ±1.0 25.4 ±1.0
P
0
Feed Hole Pitch 12.7 ±0.2 12.7 ±0.2 12.7 ±0.2 12.7 ±0.2
P
1
Feed Hole Center to Pitch 3.85 ±0.7 8.85 ±0.7 8.85 ±0.7 8.85 ±0.7
P
2
Hole Center to Component Center 6.35 ±0.7 12.7 ±0.7 12.7 ±0.7 12.7 ±0.7
FLead to Lead Distance 5.0 ±0.8 7.5 ±0.8 7.5 ±0.8 7.5 ±0.8
h Component Alignment 2.0 Max 2.0 Max 2.0 Max 2.0 Max
W Tape Width 18.0 + 1.0
18.0 - 0.5
18.0 + 1.0
18.0 - 0.5
18.0 + 1.0
18.0 - 0.5
18.0 + 1.0
18.0 - 0.5
W
0
Hold Down Tape Width 12.0 ±0.3 12.0 ±0.3 12.0 ±0.3 12.0 ±0.3
W
1
Hole Position 9.0 + 0.75
9.0 - 0.50
9.0 + 0.75
9.0 - 0.50
9.0 + 0.75
9.0 - 0.50
9.0 + 0.75
9.0 - 0.50
W
2
Hold Down Tape Position 0.5 Max 0.5 Max 0.5 Max 0.5 Max
H Height from Tape Center to Component
Base
18.0 + 2.0
18.0 - 0.0
18.0 + 2.0
18.0 - 0.0
18.0 + 2.0
18.0 - 0.0
18.0 + 2.0
18.0 - 0.0
H
0
Seating Plane Height 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5
H
1
Component Height 32.0 Max 36.0 Max 40.0 Max 46.5 Max
D
0
Feed Hole Diameter 4.0 ±0.2 4.0 ±0.2 4.0 ±0.2 4.0 ±0.2
t Total Tape Thickness 0.7 ±0.2 0.7 ±0.2 0.7 ±0.2 0.7 ±0.2
UUnder-crimp Width 8.0 Max 8.0 Max
pComponent Alignment 3
o
Max
1.00mm
3
o
Max
1.00mm
3
o
Max
1.00mm
3
o
Max
NOTE: Dimensions are in mm.
8.0 Max 8.0 Max
LA Varistor Series
Tape and Reel Data
•Conforms to ANSI and EIA specifications
•Can be supplied to IEC Publication 286-2
•Radial devices on tape are supplied with
crimped leads, straight leads, or under-
crimped leads
Line Voltage Operation, Radial Lead
Varistor Products
76
www.littelfuse.com
Line Voltage Operation, Radial Lead
LA Varistor Series
Tape and Reel Ordering Information
Crimped leads are standard on LA types supplied in tape and reel and
are denoted by the model letter “T”. Model letter “S” denotes straight
leads and letter “U” denotes special under-crimped leads.
Example:
STANDARD 
MODEL
CRIMPED 
LEADS
STRAIGHT 
LEADS
UNDER-
CRIMPED 
LEADS
V130LA2 V130LT2 V130LS2 V130LU2
Standard Bulk Pack Quantity
SYMBOL
VOLTAGE
MODEL
VARISTOR MODEL SIZE
7mm 10mm 14mm 20mm
MIN MAX MIN MAX MIN MAX MIN MAX
A V130LA-
V320LA
-
-
12
(0.472)
-
-
16
(0.630)
-
-
20
(0.787)
-
-
26.5
(1.043)
V385LA-
V1000LA
-
-
13
(0.0512)
-
-
17
(0.689)
-
-
20.5
(0.807)
-
-
28
(1.102)
ø
D All -
-
9 (0.354) -
-
12.5
(0.492)
-
-
17
(0.669)
-
-
23
(0.906)
e All 4 (0.157) 6 (0.236) 6.5
(0.256)
8.5
(0.335)
6.5
(0.256)
8.5
(0.335)
6.5
(0.256)
(Note 2)
8.5
(0.335)
(Note 2)
e
1
V130LA-
V320LA
1.5
(0.059)
3.5
(0.138)
1.5
(0.059)
3.5
(0.138)
1.5
(0.059)
3.5
(0.138)
1.5
(0.059)
3.5
(0.138)
V385A-
V1000LA
2.5
(0.098)
5.5
(0.217)
2.5
(0.098)
5.5
(0.217)
2.5
(0.098)
5.5
(0.217)
2.5
(0.098)
5.5
(0.217)
E V130LA-
V320LA
-
-
5.6
(0.220)
-
-
5.6
(0.220)
-
-
5.6
(0.220)
-
-
5.6
(0.220)
V385LA-
V660LA
-
-
7.5
(0.287)
-
-
7.5
(0.287)
-
-
7.5
(0.287)
-
-
7.5
(0.287)
V1000LA -
-
-
-
-
-
-
-
-
-
10.8
(0.425)
-
-
10.8
(0.425)
ø
b All
(Note 3)
0.585
(0.023)
0.685
(0.027)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
(Note 2)
0.86
(0.034)
(Note 2)
NOTES:
1. Dimensions in millimeters, inches in parentheses.
2. 10mm (9mm min, 11mm Max) ALSO AVAILABLE; See Additional Lead Style Options
3. 1000V parts supplied with lead wire of diameter 1.00 ±0.05 (0.039 ±0.002).
VARISTOR 
VOLTAGE 
MODEL
STANDARD BULK PACK QUANTITY
VARISTOR MODEL SIZE
7mm 10mm 14mm 20mm
130-275 1500 1000 700 500
300-460 1500 700 600 400
510-625 1500 700 500 400
2
VARISTOR
PRODUCTS
Varistor Products
77 www.littelfuse.com
LA Varistor Series
Line Voltage Operation, Radial Lead
Additional Lead Style Options
Radial lead types can be supplied with combination preformed crimp and
trimmed leads. This option is supplied to the dimensions shown.
*Seating plane interpretation per IEC-717
CRIMPED AND TRIMMED LEAD
SYMBOL
VARISTOR MODEL SIZE
7mm 10mm 14mm 20mm
MIN MAX MIN MAX MIN MAX MIN MAX
A-
-
15
(0.591)
-
-
19.5 (0.768) -
-
22.5 (0.886) -
-
29.0 (1.142)
L
TRIM
2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185)
NOTE: Dimensions in millimeters, inches in parentheses.
•To order this crimped and trimmed lead style, standard radial type
model numbers are changed by replacing the model letter “A” with “C”.
Example:
For crimped leads without trimming and any variations to the above,
contact Littelfuse.
•For 10/±1mm lead spacing on 20mm diameter models only; append
standard model numbers by adding “X10”.
Example:
STANDARD CATALOG
MODEL ORDER AS:
V130LA20A V130LA20AX10
Ordering Information
LA series Varistors are shipped standard in bulk pack with straight leads
and lead spacing outlined in the package dimensions on page 4-13.
Contact your Littelfuse sales representative to discuss the non-standard
options outlined below.
LA series varistors for Hi-Temperature operating conditions:
•Phenolic Coated LA Series devices are available with improved maxi-
mum operating maximum temperature 125°C.
•These devices also have improved temperature cycling performance
capability.
•Ratings and Specifications are as per standard LA Series except Hi-Pot
encapsulation Isolation Voltage Capability = 500V.
•To order: add X1347 to part number (e.g. V230LA20AX1347)
•Marked identifier will contain 'P' to denote Phenolic.
•These devices are not UL, CSA, VDE or CECC certified.
•Contact factory for further details.