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V47ZS1P Datasheet(PDF) 4 Page - Littelfuse

Part # V47ZS1P
Description  ZA Varistor Series
Download  14 Pages
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Manufacturer  LITTELFUSE [Littelfuse]
Direct Link  http://www.littelfuse.com
Logo LITTELFUSE - Littelfuse

V47ZS1P Datasheet(HTML) 4 Page - Littelfuse

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© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/23/14
Varistor Products
Radial Lead Varistors > ZA Series
Should transients occur in rapid succession, the average
power dissipation 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
Current Energy and Power Dissipation Ratings
Peak Pulse Current Test Waveform
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O1
T
T1
T2
TIME
O1 = Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T1 = Virtual Front time = 1.25 • t
T2 = Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8s = T1 = Virtual Front Time
20 s = T2 = Virtual Time to Half Value
0
1 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T
1 = Rise Time = 1.25 x T
T
2 = Decay Time
Example - For an 8/20
µs Current Waveform:
8µs = T
1 = Rise Time
20µs = T
2 = Decay Time
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100110
120130 140150
AMBIENTTEMPERATURE ( oC)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
Figure 1A - Power Derating for Epoxy Coated
Figure 2
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100110 120130 140150
AMBIENTTEMPERATURE ( oC)
device. The operating values of a MOV need to be derated
at high temperatures as shown above. Because varistors
only dissipate a relatively small amount of average power
they are not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
Figure 1B - Power Derating for Phenolic Coated
Phenolic Coating Option -- ZA Series Varistors for Hi-Temperature Operating Conditions:
• PhenoliccoatedZASeriesdevicesareavailablewithimprovedmaximumoperatingtemperatureof125°C
• Thesedevicesalsohaveimprovedtemperaturecyclingperformancecapability
• RatingsandspecificationsareasperstandardZASeriesexceptHi–Pot
Encapsulation (Isolation Voltage Capability) = 500V
• Toorder:add'X1347'topartnumber(e.g.V22ZA3PX1347)
• ThesedevicesarenotUL,CSA,VDEorCECCcertified
• Contactfactoryforfurtherdetails
• Productmarking:
LF 9
P22P3
YYWW
Phenolic Coated
Option
Identifier
Lead-Free,
Halogen-Free
& RoHS Compliant
Indicator


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