The LA Varistor 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 Varistor Series 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
Additional Information
Datasheet
Resources
Samples
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 1000V
M(AC)RMS
)175 to 1200V
M(DC)
Transients:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2)1200 to 6500A
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 Resistance1000MΩ
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.
• Add 'W' to the end of the part number (e.g. V230LA20APW)
• Product marking:
Lead-Free,
Halogen-Free
& RoHS Compliant
Indicator
Current Energy and Power Dissipation Ratings
LF 9
P230L20W
YYWW
Copper Electrode
Option
Identifier
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
Peak Pulse Current Test Waveform
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
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
Figure 2
Specifications are subject to change without notice.
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300V
M(AC)
RATING
T
A
= -55oC TO 85oC
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10
3
4,000
3,000
2,000
1,000
900800700600500
400
300
200
100
MAXIMUM CLAMPING VOLTAGEMODEL SIZE 7mm130 TO 300V
M(AC)
RATING
T
A
= -55oC TO 85oC
V300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
V130LA2(P)
V140LA2(P)
V150LA2(P)
V175LA2(P)
Transient V-I Characteristics Curves
FIGURE 3.CLAMPING VOLTAGE FOR V130LA1(P) - V300LA2(P) FIGURE 4.CLAMPING VOLTAGE FOR V130LA2
(P) -
V300LA4(P)
200
6,0005,000
4,000
3,000
1,000
900800700600
500400
300
10
-3
10-210
-1
10010110
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 VOLTAGEMODEL SIZE 7mm130 TO 300V
M(AC)
RATING
T
A
= -55oC TO 85oC
10
-3
10
-2
10
-1
10
0
10110
2
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10
3
4,000
3,000
2,000
1,000
900800700600500
400
300
200
100
MAXIMUM CLAMPING VOLTAGEMODEL SIZE 7mm130 TO 300V
M(AC)
RATING
T
A
= -55oC TO 85oC
V300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
V130LA2(P)
V140LA2(P)
V150LA2(P)
V175LA2(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
T
A
= -55oC TO 85oC
320 TO 480V
M(AC)
RATING
V420LA7
(P)
V385LA7
(P)
V320LA7
(P)
V460LA7
(P)
V480LA7
(P)
10-310-210-110010110
2
10
4
10
3
5,000
3,000
2,000
1,000
500
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
200
6,0005,000
4,000
3,000
1,000
900800700600
500400
300
10
-3
10-210
-1
10010110
2
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V275LA10(P)
V250LA10(P)
MAXIMUM CLAMPING VOLTAGEMODEL SIZE 10mm130 TO 420V
M(AC)
RATING
T
A
= -55oC TO 85oC
V230LA10(P)
V420LA10(P)
V175LA5(P)
V130LA5(P)
V140LA5(P)
V150LA5(P)
10
-3
10
-2
10
-1
10
0
10110
2
10
4
MAXIMUM PEAK VOLTS (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(AC)
RATING
T
A
= -55oC TO 85oC
V300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
V130LA2(P)
V140LA2(P)
V150LA2(P)
V175LA2(P)
2,000
1,000
200
100
50
20
10
5
1
2
500
201001,00010,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
15
10
2
10
4
10
5
10
6
MODEL SIZE 7mm
V130LA1(P) - V480LA7(P)
10
3
INDEFINITE
5,000
2,000
200
100
50
20
10
5
2
500
201001,00010,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
15
10
4
10
5
10
6
MODEL SIZE 10mmV130LA5(P) - V680LA10(P)
10
3
INDEFINITE
1,000
10
2
Radial Lead Varistors > LA Varistor Series
Transient V-I Characteristics Curves
Maximum Clamping Voltage for 7mm Parts
V130LA1(P) - V300LA2(P)
Figure 3
V130LA2(P) - V300LA4(P)
Pulse Rating Curves
Repetitive Surge Capability for 7mm Parts
V130LA1(P) - V480LA7(P)
Figure 4
Note: Repetitive surge capability is qualified and tested based on 8/20us current waveform
(not combination waveform) and UL1449 40.7.3 (Edition 4) test condition.
Note: Repetitive surge capability is qualified and tested based on 8/20us current waveform
(not combination waveform) and UL1449 40.7.3 (Edition 4) test condition.
Figure 9
Specifications are subject to change without notice.
Note: Repetitive surge capability is qualified and tested based on 8/20us current waveform
(not combination waveform) and UL1449 40.7.3 (Edition 4) test condition.
Page 8
Metal-Oxide Varistors (MOVs)
(P)
-
FIGURE 10.CLAMPING VOLTAGE FOR V130LA20A
(P)
- V275LA40A
(P)
(P)
- V275LA40
(P)
FIGURE 12.CLAMPING VOLTAGE FOR V140LA20A
(P)
- V230LA40A
(P)
10010110
2
10
4
10
3
V1000LA80A(P)
3,000
2,000
1,000
900800
700600
500
400
300
200
10
-3
10-210
-1
10010110
2
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10
3
V275LA40A(P)
V250LA40A(P)
V150LA20A(P)V130LA20A(P)
V175LA20A(P)
MAXIMUM CLAMPING VOLTAGEMODEL SIZE 20mm130 TO 275V
M(AC)
RATING
T
A
= -55oC TO 85oC
10110
2
10
4
10
3
3,000
2,000
500
200
10
-310-210-1100101102
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
1,000
10
3
MAXIMUM CLAMPING VOLTAGEMODEL SIZE 20mm140 TO 230V
M(AC)
RATING
T
A
= -55oC TO 85oC
300
V140LA20A(P)
V230LA40A(P)
5,000
3,000
1,000
500
10
-310-210-1100101102
10
4
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
2,000
10
3
V625LA80B(P)
V660LA100B(P)
V1000LA160B(P)
MAXIMUM CLAMPING VOLTAG E
MODEL SIZE 20mm
300 TO 1000V
MAXIMUM CLAMPING VOLTAG E
MODEL SIZE 20mm
130 TO 275V
M(AC)
RATING
T
A
= -55oC TO 85oC
Radial Lead Varistors > LA Varistor Series
Maximum Clamping Voltage for 20mm Parts
V130LA20A(P) - V275LA40A(P)
Figure 14Figure 15
V130LA20B(P) - V275LA40(P)
Figure 16
V130LA20A(P) - V275LA40A(P)
Figure 17
NOTE: If pulse ratings are exceeded, a shift of V
+/-10% could result. This type of shift, which normally results in a decrease of V
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.
(at specified current) of more than
N(DC)
, may
N(DC)
V300LA40A - V1000LA160B
Repetitive Surge Capability for 20mm Parts
V130LA20A(P) - V320LA40B(P)
Figure 18
V385LA40B(P) - V1000LA160B(P)
Figure 19
Note: Repetitive surge capability is qualified and tested based on 8/20us current waveform
(not combination waveform) and UL1449 40.7.3 (Edition 4) test condition.
Specifications are subject to change without notice.
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.
PComponent Alignment3° Max 1.00mm3° Max 1.00mm3° Max 1.00mm 3° Max
NOTE: Dimensions are in mm.
Standard Bulk Pack Quantity
Standard Bulk Pack Quantity
Varistor Voltage Model
7mm10mm14mm20mm
130-275 15001000700500
300-460 15001000600400
510-62515001000500400
660N/A1000500400
680N/A1000400300
1000 N/AN/A300200
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
Varistor Model Size
Specifications are subject to change without notice.
(See Ratings & Specifications tables and notes below)
BASE PART CODES
V XXXX LAX
For “VARISTOR”
M(AC)
ee or four digits -- 130V to 1,000V)
PACKAG ING / LEAD STYLE
TOR
LA = Bulk Pack / Straight Leads (standard)
LC = Bulk Pack / Crimped and Trimmed Leads
LS = Ta pe and Reel / Straight Leads
LT = Tape and Reel / Crimped Leads
LU = Tape and Reel / Under-Crimped Leads
RELATIVE ENERGY INDICATOR
(One or Two Digits)
CLAMP VOLTAGE VARIANT
(One digit, where applicable)
LEAD-FREE, HALOGEN-FREE AND
RoHS COMPLIANT INDICATOR
COPPER ELECTRODE
PART CODES notes below)
XX
OPTION CODES
(See notes below)
P
XXXXX
W
See OPTIONS CODES notes below
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
Ordering Notes:
BASE PART CODES:OPTION CODES:
Series + Packaging / Lead Style Designators:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
V130LA2P V130LS2PV130LT2PV130LC2PV130LU2P
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.
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.
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
Crimped &
Trimmed
Lead
Bulk Pack
Under-
Crimp
Lead
Tape &
Reel
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:
Standard ModelOrder As
V130LA20APV130LA20APX10
X2855: Nickel Barrier coated wire option --
All standard parts use tinned copper clad steel 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:
Standard ModelOrder As
V130LA20APV130LA20APX2855
X1347: Hi-Temperature phenolic coating option --
Phenolic Coated LA Series devices are available with improved
maximum operating maximum temperature of 125°C.
To order, add X1347 to end of part number
(Example: V230LA20APX1347).
For additional information please refer to the section labeled
"Phenolic Coating Option" on the third page of this document
under the "Electrical Characteristics" table.
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