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Littelfuse LA User Manual

Varistor Products
Radial Lead Varistors > LA Series
LA Varistor Series
Agency Approvals
Agency Agency File Number
E320116, E56529, E135010
116895
LR91788
42201-006
RoHS
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
voltage range from 130V to 1000V, and an
M(AC)RMS
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, Halogen­Free and RoHS
• No derating up to 85ºC ambient
compliant.
• Energy absorption capability (W
)
TM
• Available in tape and reel or bulk pack
up to 360J
• Wide operating voltage range
V
130V to 1000V
M(AC)RMS
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 (V
DC Voltage Range (V
) 130 to 1000 V
M(AC)RMS
) 175 to 1200 V
M(DC)
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 (W
Operating Ambient Temperature Range (T
Storage Temperature Range (T
Temperature Coefficient (a
Hi-Pot Encapsulation (COATING Isolation Voltage Capability) (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
COATING Insulation Resistance 1000 MΩ
STG
V
) of Clamping Voltage (VC) at Specified Test Current <0.01 %/OC
) -55 to +85
A
) -55 to +125
) 11 to 360 J
TM
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.
© 2013 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/la.html for current information.
123
Revised: June 3, 2013
LA Series Units
O
C
O
C
2500 V
LA Varistor Series
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Part
Number
Branding
Model Size
Disc Dia.
(mm)
V
RMS
V
M(AC)VM(DC)
V
DC
Energy 10
x 1000μs
WTM I
Peak
Current 8
x 20μs
TM
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V130LA1P P1301 7 130 175 11 1200 184 255 390 10 180 V130LA2P P1302 7 130 175 11 1200 184 228 340 10 180 V130LA5P P1305 10 130 175 20 2500 184 228 340 25 450 V130LA10AP P130L10 14 130 175 38 4500 184 228 340 50 1000 V130LA20AP P130L20 20 130 175 70 6500 184 228 340 100 1900 V130LA20BP P130L20B 20 130 175 70 6500 184 220 325 100 1900 V140LA2P P1402 7 140 180 12 1200 198 242 360 10 160 V140LA5P P1405 10 140 180 22 2500 198 242 360 25 400 V140LA10AP P140L10 14 140 180 42 4500 198 242 360 50 900 V140LA20AP P140L20 20 140 180 75 6500 198 242 340 100 1750 V150LA1P P1501 7 150 200 13 1200 212 284 430 10 150 V150LA2P P1502 7 150 200 13 1200 212 268 395 10 150 V150LA5P P1505 10 150 200 25 2500 212 268 395 25 360 V150LA10AP P150L10 14 150 200 45 4500 212 268 395 50 800 V150LA20AP P150L20 20 150 200 80 6500 212 268 395 100 1600 V150LA20BP P150L20B 20 150 200 80 6500 212 243 360 100 1600 V175LA2P P1752 7 175 225 15 1200 247 303 455 10 130 V175LA5P P1755 10 175 225 30 2500 247 303 455 25 350 V175LA10AP P175L10 14 175 225 55 4500 247 303 455 50 700 V175LA20AP P175L20 20 175 225 90 6500 247 303 455 100 1400 V230LA4P P2304 7 230 300 20 1200 324 396 595 10 100 V230LA10P P230L 10 230 300 35 2500 324 396 595 25 250 V230LA20AP P230L20 14 230 300 70 4500 324 396 595 50 550 V230LA40AP P230L40 20 230 300 122 6500 324 396 595 100 1100 V250LA2P P2502 7 250 330 21 1200 354 473 730 10 90 V250LA4P P2504 7 250 330 21 1200 354 429 650 10 90 V250LA10P P250L 10 250 330 40 2500 354 429 650 25 220 V250LA20AP P250L20 14 250 330 72 4500 354 429 650 50 500 V250LA40AP P250L40 20 250 330 130 6500 354 429 650 100 1000 V250LA40BP P250L40B 20 250 330 130 6500 354 413 620 100 1000 V275LA2P P2752 7 275 369 23 1200 389 515 775 10 80 V275LA4P P2754 7 275 369 23 1200 389 473 710 10 80 V275LA10P P275L 10 275 369 45 2500 389 473 710 25 200 V275LA20AP P275L20 14 275 369 75 4500 389 473 710 50 450 V275LA40AP P275L40 20 275 369 140 6500 389 473 710 100 900 V275LA40BP P275L40B 20 275 369 140 6500 389 453 680 100 900 V300LA2P P3002 7 300 405 25 1200 420 565 870 10 70 V300LA4P P3004 7 300 405 25 1200 420 517 775 10 70 V300LA10P P300L 10 300 405 46 2500 420 517 775 25 180 V300LA20AP P300L20 14 300 405 77 4500 420 517 775 50 400 V300LA40AP P300L40 20 300 405 165 6500 420 517 775 100 800 V320LA7P P3207 7 320 420 25 1200 462 565 850 10 65 V320LA10P P320L 10 320 420 48 2500 462 565 850 25 170 V320LA20AP P320L20 14 320 420 80 4500 462 565 850 50 380 V320LA40BP P320L40 20 320 420 150 6500 462 540 810 100 750 V385LA7P P3857 7 385 505 27 1200 558 682 1025 10 60
Varistor
Voltage at
1mA DC Test Current
V
V
NOM
Min
Max
Maximum
Clamping
Voltage
8 x 20 μs
NOM
VCIPK C
Typical
Capaci-
tance f =
1MHz
LA Varistor Series
124
Revised: June 3, 2013
Please refer to www.littelfuse.com/series/la.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications (Continued...)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Part
Number
Branding
Model Size
Disc Dia.
(mm)
V
RMS
V
M(AC)VM(DC)
V
DC
Energy 10
x 1000μs
WTM I
Peak
Current 8
x 20μs
TM
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V385LA10P P385L 10 385 505 51 2500 558 682 1025 25 160 V385LA20AP P385L20 14 385 505 85 4500 558 682 1025 50 360 V385LA40BP P385L40 20 385 505 160 6500 558 682 1025 100 700 V420LA7P P4207 7 420 560 30 1200 610 748 1120 10 55 V420LA10P P420L 10 420 560 55 2500 610 748 1120 25 140 V420LA20AP P420L20 14 420 560 90 4500 610 748 1120 50 300 V420LA40BP P420L40 20 420 560 160 6500 610 720 1060 100 600 V460LA7P P4607 7 460 615 37 1200 640 790 1190 10 55 V460LA10P P460L 10 460 615 56 2500 640 790 1190 25 120 V460LA20AP P460L20 14 460 615 100 4500 640 790 1190 50 280 V460LA40BP P460L40 20 460 615 170 6500 640 756 1110 100 560 V480LA7P P4807 7 480 640 35 1200 670 825 1240 10 50 V480LA10P P480L 10 480 640 60 2500 670 825 1240 25 120 V480LA40AP P480L40 14 480 640 105 4500 670 825 1240 50 270 V480LA80BP P480L80 20 480 640 180 6500 670 790 1160 100 550 V510LA10P P510L 10 510 675 63 2500 735 910 1350 25 100 V510LA40AP P510L40 14 510 675 110 4500 735 910 1350 50 250 V510LA80BP P510L80 20 510 675 190 6500 735 860 1280 100 500 V575LA10P P575L 10 575 730 65 2500 815 1000 1500 25 90 V575LA40AP P575L40 14 575 730 120 4500 815 1000 1500 50 220 V575LA80BP P575L80 20 575 730 220 6500 815 960 1410 100 450 V625LA10P P625L 10 625 825 67 2500 900 1100 1650 25 80 V625LA40AP P625L40 14 625 825 125 4500 900 1100 1650 50 210 V625LA80BP P625L80 20 625 825 230 6500 900 1100 1650 100 425 V680LA10P P680L 10 680 875 75 2500 990 1240 1875 25 65 V680LA80AP P680L80 14 680 875 145 4500 990 1240 1875 50 190
V680LA100BP P680L100 20 680 875 260 6500 990 1130 1700 100 380
V660LA10P P660L 10 660 850 70 2500 940 1210 1820 25 70 V660LA50AP P660L50 14 660 850 140 4500 940 1210 1820 50 200 V660LA100BP P660L100 20 660 850 250 6500 940 1100 1650 100 400 V1000LA80AP P1000L8 14 1000 1200 220 4500 1425 1800 2700 50 130 V1000LA160BP P1000L16 20 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.
Varistor
Voltage at
1mA DC Test Current
V
NOM
Min
V
NOM
Max
Maximum
Clamping
Voltage
8 x 20 μs
V
CIPK
Typical
Capaci-
tance f =
1MHz
C
Phenolic Coating Option -- 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. V230LA20APX1347)
• Product marking:
Lead-Free,
Halogen-Free
& RoHS Compliant
Indicator
© 2013 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/la.html for current information.
LF 9
P230P20
YYWW
Phenolic Coated
Option
Identifier
125
Revised: June 3, 2013
LA Varistor Series
Varistor Products
Radial Lead Varistors > LA Series
Current Energy and 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
Figure 1A - Power Derating for Epoxy Coated
100
90
80
70
60
50
40
30
20
PERCENT OF RATED VALUE
10
0
-55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE (
o
C)
Peak Pulse Current Test Waveform
100
90
50
PERCENT OF PEAK VALUE
10
Figure 2
O
1
T
T
1
T
2
TIME
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.
Figure 1B - Power Derating for Phenolic Coated
100
90
80
70
60
50
40
30
20
PERCENT OF RATED VALUE
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE (
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
o
C)
LA Varistor Series
126
Revised: June 3, 2013
Please refer to www.littelfuse.com/series/la.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
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