122
Varistor Products
©2009 Littelfuse, Inc.
Revision: November 5, 2009
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
V
O
L
TS (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 (
s)
SURGE CURRENT (A)
1
2
10
4
10
5
10
6
MODEL SIZE 20mm
V130LA20A(P) - V320LA40B(P)
10
3
INDEFINITE
1,000
10
2
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 (
s)
SURGE CURRENT (A)
1
2
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 V
N(DC)
(at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of V
N(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
10
0
10
1
10
2
10
4
MAXIMUM PEAK
V
O
L
TS (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(P)
V230LA40A(P)
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 PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
10
3
V275LA40B(P)
V250LA40B(P)
V130LA20B(P)
V150LA20B(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
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
10
0
10
1
10
2
10
4
MAXIMUM PEAK
V
O
L
T
S (V)
PEAK AMPERES (A)
10
3
V275LA40A(P)
V250LA40A(P)
V150LA20A(P)
V130LA20A(P)
V175LA20A(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19