V20E420 Littelfuse Inc, V20E420 Datasheet - Page 4

• Manufacturer Part Number: V20E420
• Description: VARISTR 420VRMS 6500A 20MM STRGT
• Manufacturer: Littelfuse Inc
• Series: Ultra MOVr

Specifications of V20E420

• Varistor Voltage: 748V
• Current-surge: 6.5kA
• Number Of Circuits: 1
• Maximum Ac Volts: 420VAC
• Maximum Dc Volts: 560VDC
• Energy: 320J
• Package / Case: Disc 20mm
• Suppressor Type: High Surge Current
• Peak Surge Current @ 8/20µs: 10000A
• Varistor Case: 20mm DISC
• Clamping Voltage Vc Max: 1120V
• Voltage Rating Vdc: 560V
• Voltage Rating Vac: 420V
• Product: MOV
• Voltage Rating Dc: 560 V
• Voltage Rating Ac: 420 V
• Clamping Voltage: 1.12 KV
• Peak Surge Current: 10 KA
• Surge Energy Rating: 1120 J
• Capacitance: 600 pF
• Operating Temperature Range: - 55 C to + 85 C
• Mounting: Radial
• Dimensions: 20 mm Dia.
• Termination Style: Radial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Lead free / RoHS Compliant

Varistor Products
High Surge Current, Radial Lead
Device Ratings and Specifications
Power Dissipation Ratings
Should transients occur in rapid succession, the average power dissipa-
tion is 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 in Figure 1. 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.
RoHS
V10E550P
V14E550P
V20E550P
V10E625P
V14E625P
V20E625P
1. Average power dissipation of transients should not exceed 0.25W, 0.4W, 0.6W and 1.0W for 7mm, 10mm, 14mm, and 20mm model sizes,
NUMBER
PART
respectively.
COMPLIANT
LEAD-FREE
AND RoHS
RoHS
MODELS
NOTE:
Pb
BRANDING
P10V550
P14V550
P20V550
P10V625
P14V625
P20V625
Pb
UltraMOV
Device Ratings and Specifications
V10E550
V14E550
V20E550
V10E625
V14E625
V20E625
NUMBER
PART
O
STANDARD
100
MODELS
1
90
50
10
BRANDING
10V550
14V550
20V550
10V625
14V625
20V625
™
(Continued)
T
T
1
Varistor Series
T
2
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
VOLTS
V
RMS
CONTINUOUS
M(AC)
550
550
550
625
625
625
(V)
VOLTS
V
w w w . l i t t e l f u s e . c o m
M(DC)
DC
745
745
745
825
825
825
(V)
TIME
MAXIMUM RATING (85
(Contin ued)
ENERGY
2ms
W
180
360
100
200
400
(J)
90
TM
Example: For an 8/20µs Current Waveform:
TRANSIENT
20µs = T
1 x PULSE
8µs = T
O
T
T
PEAK CURRENT
10000
10000
T = Time From 10% to 90% of Peak
3500
6000
3500
6000
1
1
2
I
(A)
TM
= Virtual Time to Half Value (Impulse Duration)
= Virtual Origin of Wave
= Virtual Front time = 1.25 • t
o
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
C)
8 x 20µs
100
1
2
90
80
70
60
50
40
30
20
10
0
= Virtual Front Time
= Virtual Time to Half Value
-55
2 x PULSE
4500
6500
2500
4500
6500
2500
I
(A)
TM
50
CURVE
60
DC TEST CURRENT
VOLTAGE AT 1mA
V
MIN
AMBIENT TEMPERATURE (
NOM
819
819
819
900
900
900
70
VARISTOR
(V)
80
V
MAX
1001
1001
1001
1100
1100
1100
NOM
SPECIFICATIONS (25
90
100 110 120 130 140 150
VOLTAGE 8 x 20 µs
1500
1500
1500
1650
1650
1650
(V)
V
CLAMPING
C
MAXIMUM
o
C)
o
(A)
I
100
100
PK
25
50
25
50
C)
TYPICAL
CAPACI-
f = 1MHz
TANCE
(pF)
39
100
180
300
160
250
90
2