V230LA40C Littelfuse Inc, V230LA40C Datasheet - Page 7

• Manufacturer Part Number: V230LA40C
• Description: VARISTOR 230V C-III 20MM RADIAL
• Manufacturer: Littelfuse Inc
• Series: C-IIIr

Specifications of V230LA40C

• Varistor Voltage: 396V
• Current-surge: 7kA
• Number Of Circuits: 1
• Maximum Ac Volts: 230VAC
• Energy: 280J
• Package / Case: Disc 20mm
• Product: MOV
• Voltage Rating Dc: 396 V
• Voltage Rating Ac: 230 V
• Clamping Voltage: 595 V
• Peak Surge Current: 9 KA
• Operating Temperature Range: - 55 C to + 85 C
• Mounting: Radial
• Dimensions: 20 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

©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
AC Bias Reliability
The C-III Series MOVs were designed for use on the AC
line. The varistor is connected across the AC line and is
biased with a constant amplitude sinusoidal voltage. It
should be noted that the definition of failure is a shift in the
nominal varistor voltage (V
this type of varistor is still functioning normally after this
tolerance will begin to dissipate more power.
statistically designed tests were performed to determine
the reliability of the C-III type of varistor under AC bias
combined with high levels of temperature stress. To
the diagram at right.
Transient Surge Current/Energy Transient Capability
The transient surge rating serves as an excellent figure
of merit for the C-III varistor. This inherent surge handling
capability is one of the C-III varistor’s best features.
The enhanced surge absorption capability results from
improved process uniformity and enhanced construction.
The homogeneity of the raw material powder and
improved control over the sintering and assembly
processes are contributing factors to this improvement.
worst case surge occurrence will be 3kA. Such a transient
event may occur up to five times over the equipment life
time (approximately 10 years). While the occurences of
repetitive surge current for the C-III Series is 20 pulses
for the 20mm units and 10 pulses for the 14mm Series.
a worst case repetitive transient surges test. After 20
the device characteristics. Changes in the clamping
negligible changes in any of the device characteristics
In both cases the inherent device capability is far
in excess of the expected worst case scenario.
Varistor Products
Radial Lead Varistors > C-III series
Revision: March 30, 2011
High Temperature Operating Life 12 ºC for 1000 Hours
at Rated Bias
Typical Repetitive Surge Current Capability of
C-III Series MOVs
Figure 12
Figure 13
Figure 1
300
250
200
150
100
600
550
500
450
400
350
300
500
450
400
350
300
0
0
0
(RATED FOR 120 PULSES)
(RATED FOR 20 PULSES)
100 200 300 400 500 600 700 800 900 1000 1100
50
5
100
10
NUMBER OF SURGES
NUMBER OF SURGES
TIME (HOURS)
150
15
200
20
750A (8/20μs)
V175LA20C
V130LA20C
3kA (8/20μs)
V130LA20C
250
25
C-III Varistor Series
300
30