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V205ZA05P Datasheet(PDF) 4 Page - Littelfuse

Part # V205ZA05P
Description  Radial Lead Varistors ZA Series
Download  14 Pages
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Manufacturer  LITTELFUSE [Littelfuse]
Direct Link  http://www.littelfuse.com
Logo LITTELFUSE - Littelfuse

V205ZA05P Datasheet(HTML) 4 Page - Littelfuse

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© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/14
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 coated ZA Series devices are available with
improved maximum operating temperature of 125°C
• These devices also have improved temperature
cycling performance capability
• Ratings and specifications are as per standard
ZA Series except Hi–Pot Encapsulation
(Isolation Voltage Capability) = 500V
• To order: add 'X1347' to part number
(e.g. V22ZA3PX1347)
• These devices are not UL, CSA, VDE or CECC certified
• Contact factory for further details
• Product marking:
LF 9
P22P3
YYWW
Phenolic Coated
Option
Identifier
Lead-Free,
Halogen-Free
& RoHS Compliant
Indicator
Phenolic Coating Option -- ZA Series Varistors for Hi-
Temperature Operating Conditions:
Copper Electrode Option:
• Add 'W' to the end of the part
number (e.g. V240ZA05PW)
• Copper electrode option is only available
for V240~V750 for ZA series.
• Product marking:
LF 9
PZ240W
YYWW
Copper Electrode
Option
Identifier
Lead-Free,
Halogen-Free
& RoHS Compliant
Indicator


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