V250LA20CP Littelfuse Inc, V250LA20CP Datasheet - Page 4

• Manufacturer Part Number: V250LA20CP
• Description: VARISTOR 250V C-III 14MM RADIAL
• Manufacturer: Littelfuse Inc
• Series: C-IIIr

Specifications of V250LA20CP

• Varistor Voltage: 429V
• Current-surge: 5kA
• Number Of Circuits: 1
• Maximum Ac Volts: 250VAC
• Energy: 135J
• Package / Case: Disc 20mm
• Suppressor Type: Transient Voltage
• Peak Surge Current @ 8/20µs: 6000A
• Varistor Case: 14mm DISC
• Clamping Voltage Vc Max: 650V
• Voltage Rating Vac: 250V
• Operating Temperature Range: -55°C To +85°C
• Product: MOV
• Voltage Rating Dc: 250 V
• Voltage Rating Ac: 250 V
• Clamping Voltage: 650 V
• Peak Surge Current: 6 KA
• Mounting: Radial
• Dimensions: 14 mm Dia.
• Termination Style: Radial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Maximum Dc Volts: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Transient V-I Characteristics Curves
Varistor Products
High Energy Radial Lead
Power Dissipation Ratings
Should transients occur
in rapid succession, the
average power
dissipation is the energy
(watt-seconds) per pulse
times the number of puls-
es per second. The
power so developed
must be within the speci-
fications shown on the
Device Ratings and
Specifications table for the specific device.The operating values
of a MOV need to be deratedat high temperatures as shown in
Figure 1. Because varistors only dissipate a relatively small
amount of average power they are not suitable 0for repetitive
applications that involve substantial amounts of average power
dissipation.
RoHS
10,000
1,000
10,000
100
1,000
100
0.001
0.001
V230LA10C(P)
Figure 5. Maximum Clamping Voltage for 20mm Parts
V385LA40C(P)
Figure 3. Maximum Clamping Voltage for 10mm Parts
V250LA10C(P)
V130LA20C(P)
Pb
V420LA40C(P)
MODEL SIZE = 10mm
0.01
MODEL SIZE = 20mm
0.01
C-III Varistor Series
(V130LA20C(P) -V680LA100C(P))
V140LA20C(P)
(V130LA5C(P) -V320LA10C(P))
V275LA10C(P)
0.1
0.1
V480LA80C(P)
V130LA5C(P)
Peak Amperes (A)
Peak Amperes (A)
100
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
90
80
70
60
50
40
30
20
10
-55
V300LA10C(P)
0
V150LA20C(P)
1
1
V510LA80C(P)
50
V175LA20C(P)
CURVE
V320LA10C(P)
60
V230LA40C(P)
V140LA5C(P)
70
AMBIENT TEMPERATURE (
1.0
V575LA80C(P)
1.0
80
V625LA80C(P)
90
V660LA100C(P)
V250LA40C(P)
100
V680LA100C(P)
100
100
110
V150LA5C(P)
o
V175LA5C(P)
120
C)
V275LA40C(P)
V320LA40C(P)
V300LA40C(P)
1000
130
1000
140 150
10000
10000
w w w . l i t t e l f u s e . c o m
O
100
1
90
50
10
T
T
1
T
2
10,000
10,000
Voltage Parts (V130LA20CX325(P) -V300LA40CX245(P))
1,000
1,000
Figure 6. Maximum Clamping Voltage for Low Clamping
100
100
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
0.001
0.001
Figure 4. Maximum Clamping Voltage for 14mm Parts
V250LA20C(P)
V230LA40CX570(P)
TIME
MODEL SIZE = 14mm
V130LA20CX325(P)
0.01
0.01
V275LA20C(P)
V250LA40CX620(P)
(V130LA10C(P) -V420LA20C(P))
Example: For an 8/20 s Current Waveform:
20 s = T
0.1
0.1
8 s = T
O
V300LA20C(P)
Peak Amperes (A)
T
T
T = Time From 10% to 90% of Peak
1
1
2
V140LA20CX340(P)
Peak Amperes (A)
= Virtual Origin of Wave
= Virtual Front time = 1.25 • t
= Virtual Time to Half Value (Impulse Duration)
V320LA20C(P)
1
2
V275LA40CX680(P)
1
1
= Virtual Front Time
= Virtual Time to Half Value
V385LA20C(P)
V130LA10C(P)
V300LA40CX745(P)
1.0
V150LA20CX360(P)
1.0
V420LA20C(P)
V300LA40CX810(P)
V140LA10C(P)
100
V175LA20CX425(P)
100
V150LA10C(P)
V230LA20C(P)
1000
V175LA10C(P)
1000
10000
51
10000
2