V661DB40 Littelfuse Inc, V661DB40 Datasheet - Page 2

• Manufacturer Part Number: V661DB40
• Description: VARISTOR INDUST 660V 900J DB
• Manufacturer: Littelfuse Inc
• Series: DA/DBr

Specifications of V661DB40

• Package / Case: Chassis Mount
• Number Of Circuits: 1
• Energy: 900J
• Current-surge: 40kA
• Maximum Ac Volts: 660VAC
• Maximum Dc Volts: 850VDC
• Varistor Voltage: 1050V (1.05kV)
• Voltage Rating Dc: 850 V
• Voltage Rating Ac: 660 V
• Clamping Voltage: 1.72 KV
• Peak Surge Current: 40 KA
• Surge Energy Rating: 900 J
• Capacitance: 2000 pF
• Operating Temperature Range: - 55 C to + 85 C
• Mounting: SMD/SMT
• Dimensions: 40 mm Dia. x 60.3 mm L x 12.7 mm H
• Termination Style: Screw
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Note : Average power dissipation of transients not to exceed 2.0W.
DA/DB Varistor Series
DA/DB Series Ratings & Specifications
Power Dissipation Ratings
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.
V131DA40
V151DA40
V251DA40
V271DA40
V321DA40
V421DA40
V481DA40
V571DA40
V661DA40
V751DA40
V511DA40
Figure 1
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.
DA
Device Branding
Part Number
100
90
80
70
60
50
40
30
20
10
0
-55
50
V131DB40
V151DB40
V251DB40
V271DB40
V321DB40
V421DB40
V481DB40
V571DB40
V661DB40
V751DB40
V511DB40
60
DB
70
AMBIENT TEMPERATURE (
80
V
V
130
150
250
275
320
420
480
575
660
750
90
510
(V)
M(AC)
RMS
Continuous
100
Maximum Rating (85ºC)
110
V
175
200
330
369
420
560
640
675
730
850
970
V
(V)
M(DC)
o
120
DC
C)
130
Energy
(2ms)
140
1050
W
270
300
370
400
460
600
650
700
770
900
(J)
TM
15
Transient
Varistor Products
8 x 20μs
Current
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
40000
Peak
(A)
I
TM
1
2
Peak Pulse Current Test Waveform
Figure 2
1080
Min
184
212
354
389
462
670
735
805
940
610
0
T = Time from 10% to 90% of Peak
T
T
Example - For an 8/20 μs Current Waveform:
(V)
Varistor Voltage at 1mA
1
1
2
= Virtual Origin of Wave
= Rise Time = 1.25 x T
= Decay Time
DC Test Current
O
8μs = T
20μs = T
100
1
90
50
10
1200
V
1050
200
240
390
430
510
680
750
820
910
(V)
NOM
1
= Rise Time
2
= Decay Time
Specifications (25ºC)
T
T
1
1000
1320
Max
1160
228
268
429
473
561
825
748
910
(V)
T
2
200A Current
Maximum
Clamping
Volt V
(8/20μs)
1240
1350
1480
1720
2000
1130
345
405
650
730
830
(A)
V
C
C
TIME
at
tance f =
Capaci-
Typical
10000
1MHz
8000
5000
4500
3800
3000
2700
2500
2200
2000
1800
(pF)
C