151
Varistor Products
©2009 Littelfuse, Inc.
Revision: November 5, 2009
DA/DB Varistor Series
Industrial High Energy Terminal Varistors > DA/DB Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
HIENERGY MO
V'S
D
A/DB S
eries
Repetitive Surge Capability
Maximum Clamping Voltage
V131DA40 - V751DA40 and V131DB40 - V751DB40
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
MAXIMUM CLAMPING VOLTAGE
DISC SIZE 40mm
130 TO 750 VM(AC) RATING
T
A
= -55
o
C to 85
o
C
V421DA/DB40
V151DA/DB40
V751DA/DB40
MAXIMUM PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
V131DA/DB40
V321DA/DB40
V271DA/DB40
V251DA/DB40
V511DA/DB40
V481DA/DB40
V571DA/DB40
V661DA/DB40
2,000
Operating/Storage
Temperature
-55°C to +85°C/ -55°C to
+125°C
Humidity Aging
+85°C, 85% RH, 1000 hours
+/- 5% typical resistance
change
Thermal Shock
+85°C to -40°C 10 times
+/- 5% typical resistance
change
Solvent Resistance
MILSTD202, Method 215F
Moisture Sensitivity
Level 1, JSTD020C
Lead Material
DA - Copper, Tinplated
DB - Brass, Tinplated
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V0 requirements.
Device Labeling
Marked with LF, part number and date
code
Physical Specifications
Environmental Specifications
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 it does not
prevent the device from continuing to function, and to provide ample protection.
V131DA40 - V751DA40 and V131DB40 - V751DB40
Figure 3
Figure 4
DISC SIZE 40mm
V131DA40 - V751DA40
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
20
100
1,000
10,000
SURGE CURRENT (A)
IMPULSE DURATION ( s)
V131DB40 - V751DB40
2
1
INDEFINITE
10
4
10
3
10
2
10
5
10
6
10