V421BA60 Littelfuse Inc, V421BA60 Datasheet - Page 3

• Manufacturer Part Number: V421BA60
• Description: VARISTOR INDUST 420V 1500J BA
• Manufacturer: Littelfuse Inc
• Series: BAr

Specifications of V421BA60

• Varistor Voltage: 680V
• Current-surge: 70kA
• Number Of Circuits: 1
• Maximum Ac Volts: 420VAC
• Maximum Dc Volts: 560VDC
• Energy: 1500J
• Package / Case: Chassis Mount
• Voltage Rating Dc: 560 V
• Voltage Rating Ac: 420 V
• Clamping Voltage: 1.06 KV
• Peak Surge Current: 70 KA
• Surge Energy Rating: 1500 J
• Capacitance: 6000 pF
• Operating Temperature Range: - 55 C to + 85 C
• Mounting: SMD/SMT
• Dimensions: 60 mm Dia. x 100 mm L
• 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

©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
Stand by Power Dissipation vs Applied V
Temperatures
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 Characteristics Table for the specific device. Furthermore,
the operating values need to be derated at high temperatures as
shown in the above diagram. 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.
Figure 1
Figure 3
100
90
80
70
60
50
40
30
20
10
0.08
0.06
0.04
0
-55
1.0
0.8
0.6
0.4
0.2
0.1
50
TYPICAL TEMPERATURE COEFFICIENT
OF POWER DISSIPATION = 2.2%/
MAX
MAX
TYP
80
60
PERCENTAGE OF MAXIMUM RATED V
AT
AT
AT
T
T
T
70
AMBIENT TEMPERATURE (
A
A
A
= 25
= 85
= 25
80
o
o
o
C
C
C
90
90
100
110
o
C
o
100
120
C)
Rms
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
at Varied
130
RMS
(%)
140 150
110
Revision: June 24, 2010
Typical Stability of Standby Power Dissipation at Rated
V
Peak Pulse Current Test Waveform
Figure 2
Figure 4
RMS
vs Time
0
T = Time from 10% to 90% of Peak
T
T
Example - For an 8/20 μs Current Waveform:
1
1
2
0.5
0.4
0.3
0.2
0.1
= Virtual Origin of Wave
= Rise Time = 1.25 x T
= Decay Time
0
O
100
8μs = T
20μs = T
0
90
50
10
1
1,000 HOURS, T
1
2
= Rise Time
= Decay Time
TIME AT RATED V
T
T
1
A
10
T
= 85
2
Figure 26
o
C
RMS
(HOURS)
100
TIME
BA/BB Varistor Series
1,000