Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA 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
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
• Lead–free and RoHS
compliant option
available. Please see
the device and ratings
specifications table
for more information.
• 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
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Agency Agency File Number
E320116, E56529, E135010
116895
LR91788
42201-006
Continuous LA Series Units
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 OC
Storage Temperature Range (TSTG) -55 to +125 OC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current <0.01 %/OC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) 2500 V
COATING 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 any other conditions above those indicated in the operational sections of this specification is
not implied.
LA Varistor Series
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series Ratings & Specifications
Lead–free
and RoHS Compliant
Models
Standard
Models
Model
Size
Disc
Dia.
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient Varistor
Voltage at
1mA
DC Test
Current
Maximum
Clamping
Voltage
8 x 20 μs
Typical
Capaci-
tance f =
1MHz
VRMS VDC
Energy
10 x
1000μs
Peak
Current
8 x 20μs
Part
Number Branding Part
Number Branding VM(AC) VM(DC) WTM I
TM VNOM
Min
VNOM
Max VCIPK C
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V130LA1P P1301 V130LA1 1301 7 130 175 11 1200 184 255 390 10 180
V130LA2P P1302 V130LA2 1302 7 130 175 11 1200 184 228 340 10 180
V130LA5P P1305 V130LA5 1305 10 130 175 20 2500 184 228 340 25 450
V130LA10AP P130L10 V130LA10A 130L10 14 130 175 38 4500 184 228 340 50 1000
V130LA20AP P130L20 130LA20A 130L20 20 130 175 70 6500 184 228 340 100 1900
V130LA20BP P130L20B V130LA20B 130L20B 20 130 175 70 6500 184 220 325 100 1900
V140LA2P P1402 V140LA2 1402 7 140 180 12 1200 198 242 360 10 160
V140LA5P P1405 V140LA5 1405 10 140 180 22 2500 198 242 360 25 400
V140LA10AP P140L10 V140LA10A 140L10 14 140 180 42 4500 198 242 360 50 900
V140LA20AP P140L20 V140LA20A 140L20 20 140 180 75 6500 198 242 340 100 1750
V150LA1P P1501 V150LA1 1501 7 150 200 13 1200 212 284 430 10 150
V150LA2P P1502 V150LA2 1502 7 150 200 13 1200 212 268 395 10 150
V150LA5P P1505 V150LA5 1505 10 150 200 25 2500 212 268 395 25 360
V150LA10AP P150L10 V150LA10A 150L10 14 150 200 45 4500 212 268 395 50 800
V150LA20AP P150L20 V150LA20A 150L20 20 150 200 80 6500 212 268 395 100 1600
V150LA20BP P150L20B V150LA20B 150L20B 20 150 200 80 6500 212 243 360 100 1600
V175LA2P P1752 V175LA2 1752 7 175 225 15 1200 247 303 455 10 130
V175LA5P P1755 V175LA5 1755 10 175 225 30 2500 247 303 455 25 350
V175LA10AP P175L10 V175LA10A 175L10 14 175 225 55 4500 247 303 455 50 700
V175LA20AP P175L20 V175LA20A 175L20 20 175 225 90 6500 247 303 455 100 1400
V230LA4P P2304 V230LA4 2304 7 230 300 20 1200 324 396 595 10 100
V230LA10P P230L V230LA10 230L 10 230 300 35 2500 324 396 595 25 250
V230LA20AP P230L20 V230LA20A 230L20 14 230 300 70 4500 324 396 595 50 550
V230LA40AP P230L40 V230LA40A 230L40 20 230 300 122 6500 324 396 595 100 1100
V250LA2P P2502 V250LA2 2502 7 250 330 21 1200 354 473 730 10 90
V250LA4P P2504 V250LA4 2504 7 250 330 21 1200 354 429 650 10 90
V250LA10P P250L V250LA10 250L 10 250 330 40 2500 354 429 650 25 220
V250LA20AP P250L20 V250LA20A 250L20 14 250 330 72 4500 354 429 650 50 500
V250LA40AP P250L40 V250LA40A 250L40 20 250 330 130 6500 354 429 650 100 1000
V250LA40BP P250L40B V250LA40B 250L40B 20 250 330 130 6500 354 413 620 100 1000
V275LA2P P2752 V275LA2 2752 7 275 369 23 1200 389 515 775 10 80
V275LA4P P2754 V275LA4 2754 7 275 369 23 1200 389 473 710 10 80
V275LA10P P275L V275LA10 275L 10 275 369 45 2500 389 473 710 25 200
V275LA20AP P275L20 V275LA20A 275L20 14 275 369 75 4500 389 473 710 50 450
V275LA40AP P275L40 V275LA40A 275L40 20 275 369 140 6500 389 473 710 100 900
V275LA40BP P275L40B V275LA40B 275L40B 20 275 369 140 6500 389 453 680 100 900
V300LA2P P3002 V300LA2 3002 7 300 405 25 1200 420 565 870 10 70
V300LA4P P3004 V300LA4 3004 7 300 405 25 1200 420 517 775 10 70
V300LA10P P300L V300LA10 300L 10 300 405 46 2500 420 517 775 25 180
V300LA20AP P300L20 V300LA20A 300L20 14 300 405 77 4500 420 517 775 50 400
V300LA40AP P300L40 V300LA40A 300L40 20 300 405 165 6500 420 517 775 100 800
V320LA7P P3207 V320LA7 3207 7 320 420 25 1200 462 565 850 10 65
V320LA10P P320L V320LA10 320L 10 320 420 48 2500 462 565 850 25 170
V320LA20AP P320L20 V320LA20A 320L20 14 320 420 80 4500 462 565 850 50 380
V320LA40BP P320L40 V320LA40B 320L40 20 320 420 150 6500 462 540 810 100 750
V385LA7P P3857 V385LA7 3857 7 385 505 27 1200 558 682 1025 10 60
V385LA10P P385L V385LA10 385L 10 385 505 51 2500 558 682 1025 25 160
V385LA20AP P385L20 V385LA20A 385L20 14 385 505 85 4500 558 682 1025 50 360
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
Lead–free
and RoHS Compliant
Models
Standard
Models
Model
Size
Disc
Dia.
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient Varistor
Voltage at
1mA
DC Test
Current
Maximum
Clamping
Voltage
8 x 20 μs
Typical
Capaci-
tance f =
1MHz
VRMS VDC
Energy
10 x
1000μs
Peak
Current
8 x 20μs
Part
Number Branding Part
Number Branding VM(AC) VM(DC) WTM I
TM VNOM
Min
VNOM
Max VCIPK C
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V385LA40BP P385L40 V385LA40B 385L40 20 385 505 160 6500 558 682 1025 100 700
V420LA7P P4207 V420LA7 4207 7 420 560 30 1200 610 748 1120 10 55
V420LA10P P420L V420LA10 420L 10 420 560 55 2500 610 748 1120 25 140
V420LA20AP P420L20 V420LA20A 420L20 14 420 560 90 4500 610 748 1120 50 300
V420LA40BP P420L40 V420LA40B 420L40 20 420 560 160 6500 610 720 1060 100 600
V460LA7P P4607 V460LA7C 4607 7 460 615 37 1200 640 790 1190 10 55
V460LA10P P460L V460LA10 460L 10 460 615 56 2500 640 790 1190 25 120
V460LA20AP P460L20 V460LA20A 460L20 14 460 615 100 4500 640 790 1190 50 280
V460LA40BP P460L40 V460LA40B 460L40 20 460 615 170 6500 640 756 1110 100 560
V480LA7P P4807 V480LA7 4807 7 480 640 35 1200 670 825 1240 10 50
V480LA10P P480L V480LA10 480L 10 480 640 60 2500 670 825 1240 25 120
V480LA40AP P480L40 V480LA40A 480L40 14 480 640 105 4500 670 825 1240 50 270
V480LA80BP P480L80 V480LA80B 480L80 20 480 640 180 6500 670 790 1160 100 550
V510LA10P P510L V510LA10 510L 10 510 675 63 2500 735 910 1350 25 100
V510LA40AP P510L40 V510LA40A 510L40 14 510 675 110 4500 735 910 1350 50 250
V510LA80BP P510L80 V510LA80B 510L80 20 510 675 190 6500 735 860 1280 100 500
V575LA10P P575L V575LA10 575L 10 575 730 65 2500 805 1000 1500 25 90
V575LA40AP P575L40 V575LA40A 575L40 14 575 730 120 4500 805 1000 1500 50 220
V575LA80BP P575L80 V575LA80B 575L80 20 575 730 220 6500 805 960 1410 100 450
V625LA10P P625L V625LA10 625L 10 625 825 67 2500 900 1100 1650 25 80
V625LA40AP P625L40 V625LA40A 625L40 14 625 825 125 4500 900 1100 1650 50 210
V625LA80BP P625L80 V625LA80B 625L80 20 625 825 230 6500 900 1100 1650 100 425
V680LA10P P680L V680LA10 680L 10 680 875 75 2500 990 1240 1875 25 65
V680LA80AP P680L80 V680LA80A 680L80 14 680 875 145 4500 990 1240 1875 50 190
V680LA100BP P680L100 V680LA100B 680L100 20 680 875 260 6500 990 1130 1700 100 380
V660LA10P P660L V660LA10 660L 10 660 850 70 2500 940 1210 1820 25 70
V660LA50AP P660L50 V660LA50A 660L50 14 660 850 140 4500 940 1210 1820 50 200
V660LA100BP P660L100 V660LA100B 660L100 20 660 850 250 6500 940 1100 1650 100 400
V1000LA80AP P1000L8 V1000LA80A 1000L80 14 1000 1200 220 4500 1425 1800 2700 50 130
V1000LA160BP P1000L16 V1000LA160B 1000L160 20 1000 1200 360 6500 1425 1600 2420 100 250
LA Series Ratings & Specifications (Continued...)
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.
LA Series Varistors for Hi-Temperature Operating Conditions:
• Phenolic–coated LA Series devices are available with improved maximum 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.
• These devices are not UL, CSA, VDE or CECC certified.
• To order: add X1347 to end of part number (e.g. V230LA20AX1347 or V230LA20APX1347 for Lead Free/RoHS version)
• Product Marking:
LF 9
P175P10
YYWW Pholenic Coated
Option
Identifier
Lead-Free/RoHS
Option
Identifier
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
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 the diagram below.
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.
Power Dissipation Ratings
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)
PERCENT OF RATED VALUE
Peak Pulse Current Test Waveform
Current Energy and Power Derating Curve
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK VALUE
Figure 1
Figure 2
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
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 PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V150LA1(P)
V130LA1(P)
V300LA2(P)
V275LA2(P)
V250LA2(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V130LA1(P) - V300LA2(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
T
A
= -55
o
C TO 85
o
C
320 TO 480V
M(AC)
RATING
V420LA7
(P)
V385LA7
(P)
V320LA7
(P)
V460LA7
(P)
V480LA7
(P)
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 PEAK VOLTS (V)
V320LA7(P) - V480LA7(P)
Maximum Clamping Voltage for 7mm Parts
V130LA2(P) - V300LA4(P)
10-3 10-2 10 -1 10 010 110 210 4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
103
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 300VM(AC) RATING
TA = -55oC TO 85oCV300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
V130LA2(P)
V140LA2(P)
V150LA2(P)
V175LA2(P)
Transient V-I Characteristics Curves Pulse Rating Curves
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
10
2
10
4
10
5
10
6
MODEL SIZE 7mm
V130LA1(P) - V480LA7(P)
10
3
INDEFINITE
Repetitive Surge Capability for 7mm Parts
V130LA1(P) - V480LA7(P)
Figure 3 Figure 4
Figure 5
Figure 6
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
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(P)
V510LA10(P)
V480LA10(P)/
V460LA10(P)
V385LA10(P)
V300LA10(P)
V320LA10(P)
PEAK AMPERES (A)
V625LA10(P)
V660LA10(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
T
A
= -55
o
C TO 85
o
C
300 TO 680V
M(AC)
RATING
MAXIMUM PEAK VOLTS (V)
V680LA10(P)
Maximum Clamping Voltage for 10mm Parts
V300LA10(P) - V680LA10(P)
Transient V-I Characteristics Curves (Continued...)
V130LA5(P) - V420LA10(P)
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 PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V275LA10(P)
V250LA10(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
130 TO 420V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V230LA10(P)
V420LA10(P)
V175LA5(P)
V130LA5(P)
V140LA5(P)
V150LA5(P)
Repetitive Surge Capability for 10mm Parts
V130LA5(P) - V680LA10(P)
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10 104
105
106
MODEL SIZE 10mm
V130LA5(P) - V680LA10(P)
103
INDEFINITE
1,000 102
Pulse Rating Curves (Continued...)
Figure 7
Figure 9
Figure 8
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
Maximum Clamping Voltage for 14mm Parts
V130LA10A(P) - 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 PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V275LA20A(P)
V250LA20A(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
130 TO 320V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V230LA20A(P)
V175LA10A(P)
V130LA10A(P)
V140LA10A(P)
V150LA10A(P)
V320LA20A(P)
V300LA20A(P)
5,000
3,000
1,000
500
300
10-3 10-2 10-1 100101102104
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
10
-4
V1000LA80A(P)
V660LA50A(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
385 TO 1000V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
700
V625LA40A(P)
V680LA80A(P)
V575LA40A(P)
V510LA40A(P)
V480LA40A(P)/V460LA20A(P)
V420LA20A(P)
V385LA20A(P)
V385LA20A(P) V1000LA80A(P)
Transient V-I Characteristics Curves (Continued...)
Repetitive Surge Capability for 14mm Parts
V130LA10A(P) - V320LA20A(P)
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
104
105
106
MODEL SIZE 14mm
V130LA10A(P) - V320LA20A(P)
103
INDEFINITE
1,000 102
V385LA20A(P) - V1000LA80A(P)
5
,
000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
104
105
106
MODEL SIZE 14mm
V385LA20A(P) - V1000LA80A(P)
103
INDEFINITE
1,000 102
Pulse Rating Curves (Continued...)
Figure 10 Figure 11
Figure 12 Figure 13
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Maximum Clamping Voltage for 20mm Parts
5,000
3,000
1,000
500
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V625LA80B(P)
V660LA100B(P)
V1000LA160B(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
300 TO 1000V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V575LA80B(P)
V510LA80B(P)
V480LA80B(P)/
V460LA40B(P)
V680LA100B(P)
V420LA40B(P)
V385LA40B(P)
V320LA40B(P)
V300LA40A(P)
V300LA40A - V1000LA160B
Transient V-I Characteristics Curves (Continued...)
Repetitive Surge Capability for 20mm Parts
V130LA20A(P) - V320LA40B(P)
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
12
104
105
106
MODEL SIZE 20mm
V130LA20A(P) - V320LA40B(P)
103
INDEFINITE
1,000
102
10
5,000
1
Pulse Rating Curves (Continued...)
V385LA40B(P) - V1000LA160B(P)
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
12
10
4
10
5
10
6
MODEL SIZE 20mm
V385LA40B(P) - V1000LA160B(P)
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.
V130LA20A(P) - V275LA40A(P)
3,000
2,000
500
200
10-3 10-2 10-1 100101102104
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
1,000
103
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
140 TO 230VM(AC) RATING
TA = -55oC TO 85oC
300
V140LA20A(P)
V230LA40A(P)
3,000
2,000
1,000
900
800
700
600
500
400
300
200
10
-3 10-2 10-1 100101102104
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
103
V275LA40B(P)
V250LA40B(P)
V130LA20B(P)
V150LA20B(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275VM(AC) RATING
TA = -55oC TO 85oC
V130LA20B(P) - V275LA40(P)
V130LA20A(P) - V275LA40A(P)
3,000
2,000
1,000
900
800
700
600
500
400
300
200
10-3 10-2 10-1 10010110210
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
103
V275LA40A(P)
V250LA40A(P)
V150LA20A(P)
V130LA20A(P)
V175LA20A(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275VM(AC) RATING
TA = -55oC TO 85oC
Figure 14 Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
Wave Solder Profile
Operating Ambient
Temperature Range -55°C to +85°C
Storage Temperature Range -55°C to +125°C
Humidity Aging +85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Thermal Shock +85°C to -40°C 5 times
+/-10% typical voltage change
Solvent Resistance MIL–STD–202, Method 215F
Moisture Sensitivity Level 1, J–STD–020C
Lead Material Tin–Coated Copper Wire
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Insulating Material Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Device Labeling Marked with LF, voltage, UL/CSA logos,
and date code
Physical Specifications Environmental Specifications
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 240C
Lead–free Profile
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 260C
Non Lead–free Profile
Figure 20 Figure 21
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Product Dimensions (mm)
Dimension
VRMS
Voltage
Model
7mm Size 10mm Size 14mm Size 20mm Size
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
A
V130LA- - 12 - 16 - 20 - 26.5
V320LA - (0.472) - (0.630) - (0.787) - (1.043)
V385LA- - 13 - 17 - 20.5 - 28
V1000LA - (0.0512) - (0.689) - (0.807) - (1.102)
ØD All - 9 (0.354) - 12.5 (0.492) - 17 (0.669) - 23 (0.906)
eAll 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
(Note 2)
e1
V130LA- 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5
V320LA (0.059) (0.138) (0.059) (0.138) (0.059) (0.138) (0.059) (0.138)
V385LA- 2.5 5.5 2.5 5.5 2.5 5.5 2.5 5.5
V1000LA (0.098) (0.217) (0.098) (0.217) (0.098) (0.217) (0.098) (0.217)
E
V130LA- - 5.6 - 5.6 - 5.6 - 5.6
V320LA - (0.220) - (0.220) - (0.220) - (0.220)
V385LA- - 7.3 - 7.3 - 7.3 - 7.3
V510LA - (0.287) - (0.287) - (0.287) - (0.287)
V550LA- - 8.3 - 8.3 - 8.3 - 8.3
V680LA - (0.327) - (0.327) - (0.327) - (0.327)
V1000LA - - - - - 10.8 (0.425) - 10.8 (0.425)
Øb 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)
ATRIM All - 15 (0.591) - 19.5 (0.768) - 22.5 (0.886)
(NOTE 4) - 29.0 (1.142)
LTRIM All 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)
*SEATING
PLANE
LTRIM
ATRIM
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)
4. 'A' Max. for V1000LC80A (P) = 24.00 (0.945”)
CRIMPED AND TRIMMED LEAD
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.
*Seating plane interpretation per IEC-717
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
Tape and Reel Specifications
CRIMPED LEADS "LT" CRIMPED LEADS "LT"
P1
P1
W0
E
DP
DH DH
W1
W
Ft
W2
P
DP
C
Db
H0
DD0
H1SEATING
PLANE
P2
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
Db
H
DD0
H1
P0
DH
E
DH
DP
W1
W
Ft
W2
P
DP
Db
H
DD0
H1
P1
P2
W0
UNDER-CRIMPED LEADS "LU" UNDER-CRIMPED LEADS "LU"
U
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
Db
Ho
DD0
H1
P0
U
DH
E
DH
DP
W1
W
Ft
W2
P
DP
Db
Ho
DD0
H1
P2
W0
P1
7mm Devices 10, 14 and 20mm Devices
STRAIGHT LEADS "LS" STRAIGHT LEADS "LS"
P1
P0
E
DP
DH DH
W1
W
Ft
W2W0
P
DP
C
Db
H0
DD0
H1SEATING
PLANE
P2
(Dimensions presented on following page.)
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Symbol Description Model Size
7mm 10mm 14mm 20mm
PPitch of Component 12.7 +/- 1.0 25.4 +/- 1.0 25.4 +/- 1.0 25.4 +/- 1.0
P0Feed Hole Pitch 12.7 +/- 0.2 12.7 +/- 0.2 12.7 +/- 0.2 12.7 +/- 0.2
P1Feed Hole Center to Pitch 3.85 +/- 0.7 8.85 +/- 0.7 8.85 +/- 0.7 8.85 +/- 0.7
P2Hole 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
hComponent Alignment 2.0 Max 2.0 Max 2.0 Max 2.0 Max
WTape Width 18.0 +1.0 / -0.5 18.0 +1.0 / -0.5 18.0 +1.0 / -0.5 18.0 +1.0 / -0.5
W0Hold Down Tape Width 12.0 +/- 0.3 12.0 +/- 0.3 12.0 +/- 0.3 12.0 +/- 0.3
W1Hole Position 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50
W2Hold Down Tape Position 0.5 Max 0.5 Max 0.5 Max 0.5 Max
HHeight from Tape Center to
Component Base 18.0 +2.0 / -0.0 18.0 +2.0 / -0.0 18.0 +2.0 / -0.0 18.0 +2.0 / -0.0
H0Seating Plane Height 16.0 +/- 0.5 16.0 +/- 0.5 16.0 +/- 0.5 16.0 +/- 0.5
H1Component Height 32.0 Max 36.0 Max 40.0 Max 46.5 Max
D0Feed Hole Diameter 4.0 +/- 0.2 4.0 +/- 0.2 4.0 +/- 0.2 4.0 +/- 0.2
TTotal 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 8.0 Max 8.0 Max
PComponent Alignment 3° Max 1.00mm 3° Max 1.00mm 3° Max 1.00mm 3° Max
Tape and Reel Specifications (continued)
NOTE: Dimensions are in mm.
• 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
• 7mm parts are available on tape and reel up to 480 VAC only
• 10mm parts are available on tape and reel up to 510 VAC only
• 14mm and 20mm parts are available on tape and reel up to 550 VAC only
Standard Bulk Pack Quantity
Varistor Voltage Model
Standard Bulk Pack Quantity
Varistor Model Size
7mm 10mm 14mm 20mm
130-275 1500 1000 700 500
300-460 1500 1000 600 400
510-625 1500 1000 500 400
660 N/A 1000 500 400
680 N/A 1000 400 300
1000 N/A N/A 300 200
Varistor Products
©2010 Littelfuse, Inc.
Revision: June 10, 2010
LA Varistor Series
Radial Lead Varistors > LA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
LA Series
Part Numbering System
XX
For “VARISTOR”
VM(AC)
(Three or four digits -- 130V to 1,000V)
V XXXX LA X
RELATIVE ENERGY INDICATOR
(One or Two Digits)
CLAMP VOLTAGE VARIANT
(One digit, where applicable)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
P
See OPTIONS CODES notes below
XXXXX
OPTION CODES
(See notes below)
BASE PART CODES
(See Ratings & Specifications tables and notes below)
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
LA = Bulk Pack / Straight Leads (standard)
LC = Bulk Pack / Crimped and Trimmed Leads
LS = Tape and Reel / Straight Leads
LT = Tape and Reel / Crimped Leads
LU = Tape and Reel / Under-Crimped Leads
Ordering Notes:
Series + Packaging / Lead Style Designators:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
Crimped &
Trimmed
Lead
Bulk Pack
Under-
Crimp
Lead
Tape &
Reel
V130LA2 V130LS2V130LT2V130LC2V130LU2
Standard Model Order As
V130LA20A V130LA20AX10
X1347: Hi-Temperature phenolic coated option --
Phenolic Coated LA Series devices are available with improved
maximum operating maximum temperature of 125°C.
For additional information see bottom of page 113.
To order, add X1347 to end of part number (V230LA20AX1347
or V230LA20APX1347 for Lead Free/RoHS version).
Crimped leads are standard on LA Series varistors supplied in
tape and reel, denoted with "LT." For crimped leads without
trimming and any varitions other than that described above,
please contact Littelfuse.
For standard parts, use the BASE PART designator only.
For parts with non-standard options (such as additional form, packaging
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
requirements. Please contact a Littelfuse products representative for
additional information or questions
Lead–free / RoHS Designator:
For Lead–free and RoHS compliant parts add "P" after the BASE
PART number and before any other OPTION CODE:
BASE PART CODES: OPTION CODES:
Standard Model
with Option
Order As
V420LA20AX1347 V420LA20APX1347
Standard Model Order As
V130LA20A V130LA20AX2855
Standard Model Order As
V130LA2 V130LA2P
X10: 10mm lead spacing option --
For 10 (-/+1) mm lead spacing (available on 20mm
diameter models only), append standard model
BASE PART number with "X10." Example:
X2855: Nickel Barrier coated wire option --
All standard parts use Tin–coated Copper wire. Nickel
Barrier coated wire is available as an option, consisting
of Copper wire with a flashing of Nickel followed by
a top coating of Tin. To order append standard model
BASE PART number with "X2855." Example:
Littelfuse LA Series varistors are shipped standard in bulk pack
with straight leads and lead spacing outlined in the Package
Dimensions section of this data sheet. Contact your Littelfuse
sales representative to discuss non-standard options.
