V175LT5CP Datasheet, PDF (4/10 Pages) Littelfuse – Radial Lead Varistors > C-III series

Varistor Products
Radial Lead Varistors > C-III series
Current Energy and Power Dissipation Ratings
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
Figure 1A - Power Derating for Epoxy Coated
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENTTEMPERATURE ( ^oC)
Peak Pulse Current Test Waveform
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
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENTTEMPERATURE ( ^oC)
100
90
50
10
O₁
Figure 2
T
T₁
T₂
TIME
0₁ = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T = Rise Time = 1.25 x T
1
T = Decay Time
2
Example - For an 8/20 μs Current Waveform:
8μs = T₁ = Rise Time
20μs = T₂ = Decay Time
Transient V-I Characteristics Curves
Pulse Rating Curves
Maximum Clamping Voltage for 10mm Parts
V130LA5C(P) – V625LA10C(P)
10000
MODEL SIZE = 10MM
T_A = -55^oC TO 85^oC
130 to 625V_M(AC) RATING
MAXIMUM CLAMP
VOLTAGE
510
550
625
460 ^{440 420}
300
320
385
230
250
275
1000
100
0.001
0.01
Figure 3
130 ^{140 150 175}
0.1
1
10
100
1000
10000
PEAK CURRENT (A)
Repetitive Surge Capability for 10mm Parts
V130LA5C(P)-V320LA10C(P)
10,000
1
2
15
1,000
10²
10³
100
∞
MODEL SIZE = 10mm
T_A = -55^oC TO 85^oC
10⁴
10⁵
10⁶
10
1
10
Figure 4
100
1,000
SURGE IMPULSE DURATION (μs)
10,000
C-III Varistor Series
116
Revised: June 5, 2013
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.