V131DA40_09 Datasheet, PDF (2/4 Pages) Littelfuse – Industrial High Energy Terminal Varistors

Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series
DA/DB Series Ratings & Specifications
Part Number
Device Branding
DA
V131DA40
V151DA40
V251DA40
V271DA40
V321DA40
V421DA40
V481DA40
V511DA40
V571DA40
V661DA40
V751DA40
DB
V131DB40
V151DB40
V251DB40
V271DB40
V321DB40
V421DB40
V481DB40
V511DB40
V571DB40
V661DB40
V751DB40
Maximum Rating (85ºC)
Continuous
Transient
V_RMS
V_DC
Energy
(2ms)
Peak
Current
8 x 20μs
V_M(AC)
(V)
V_M(DC)
(V)
W_TM
(J)
130
175
270
150
200
300
250
330
370
275
369
400
320
420
460
420
560
600
480
640
650
510
675
700
I_TM
(A)
40000¹
40000²
40000
40000
40000
40000
40000
40000
575
730
770
40000
660
850
900
40000
750
970
1050
40000
Note : Average power dissipation of transients not to exceed 2.0W.
Specifications (25ºC)
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping
Volt V_C at
200A Current
(8/20μs)
Min
V_NOM
Max
V_C
(V)
(V)
(V)
(A)
184
200
228
345
212
240
268
405
354
390
429
650
389
430
473
730
462
510
561
830
610
680
748
1130
670
750
825
1240
735
820
910
1350
805
910
1000
1480
940
1050
1160
1720
1080
1200
1320
2000
Typical
Capaci-
tance f =
1MHz
C
(pF)
10000
8000
5000
4500
3800
3000
2700
2500
2200
2000
1800
Power Dissipation Ratings
Peak Pulse Current Test Waveform
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 15
Figure 1
AMBIENTTEMPERATURE ( ^oC)
NOTES:
1. Peak current Applies to applications rated up to 115VRMS. Peak
current is 30kA for applications greater than 115V.
2. Peak current applies to applications rated up to 132VRMS. Peak
Current is 30kA for applications greater than 132V.
Should transients occur in rapid succession, the
average power dissipation required is simply 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. Furthermore,
the operating values need to be derated at high
temperatures as shown above. Because varistors can only
dissipate a relatively small amount of average power they
are, therefore, not suitable for repetitive applications that
involve substantial amounts of average power dissipation.
100
90
50
10
O₁
Figure 2
T
T₁
T₂
TIME
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
DA/DB Varistor Series
Revision: October 29, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.