V175LT10C Datasheet, PDF (4/10 Pages) Littelfuse – Radial Lead Varistors > C-III series

Varistor Products
Radial Lead Varistors > C-III series
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
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.
Current Energy and Power Derating Curve
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
Figure 1
AMBIENTTEMPERATURE ( ^oC)
Peak Pulse Current Test Waveform
100
90
50
10
O₁
Figure 2
T
T₁
T₂
TIME
0₁ = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T₁ = Rise Time = 1.25 x T
T₂ = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T₁ = Rise Time
20μs = T₂ = Decay Time
Transient V-I Characteristics Curves
Maximum Clamping Voltage for 10mm Parts
V130LA5C(P) – V320LA10C(P)
10,000
MODEL SIZE = 10mm
V320LA10C(P)
1,000
V250LA10C(P)
V300LA10C(P)
V275LA10C(P)
V230LA10C(P)
100
0.001
0.01
Figure 3
V130LA5C(P)
V140LA5C(P)
V175LA5C(P)
V150LA5C(P)
0.1
1
1.0
100
1000
10000
Peak Amperes (A)
Pulse Rating Curves
Repetitive Surge Capability for 10mm Parts
V130LA5C(P)-V320LA10C(P)
10,000
1
2
10
1,000
10²
10 ³
100
10⁴
MODEL SIZE = 10mm
10
1
10
Figure 4
100
1,000
Surge Impulse Duration (μs)
10,000
C-III Varistor Series
104
Revision: January 9, 2009
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.