Littelfuse CA Varistor Series - Manual

© 2013 Littelfuse, Inc. 181
Revised: May 8, 2013
Varistor Products
CA Varistor Series
High Energy Industrial Disc Varistors > CA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
HI–ENERGY
MO
V’S
CA Series
CA Varistor Series
Description
The CA Series of transient surge suppressors are industrial
high-energy disc varistors (MOVs) intended for special
applications requiring unique electrical contact or packaging
methods provided by the customer. The electrode finish
of these devices is solderable and can also be used with
pressure contacts. Discs of the same diameter may be
stacked.
This series of industrial disc varistors are nominal 60mm
diameter, with disc thickness ranging from 2.7mm to
32mm. The voltage range is 250V to 2800 V
(AC)RMS
.
For information on soldering considerations, refer to EC637
"Recommendations for Soldering Terminal Leads to MOV
Varistor Discs."
Features
• Standard disc size
nominal 60mm
diameter
• Discs have edge
passivation insulation
• High peak pulse
current range
50000A to 70000A
• Very high–energy
capability W
tm
880J to 10000J
Absolute Maximum Ratings
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Continuous CA Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 250 to 2800 V
DC Voltage Range (V
M(DC)
) 330 to 3500 V
Transient:
Peak Pulse Current (I
TM
)
For 8/20μs Current Wave(See Figure 2) 20,000 to 70,000 A
Single-Pulse Energy Range
For 2ms Current Square Wave (W
TM
) 880 to 10,000 J
Operating Ambient Temperature Range (T
A
) -55 to +85 °C
Storage Temperature Range (T
STG
) - 55 to +85 °C
Temperature Coefficient (V) of Clamping Voltage (V
C
) at Specified Test Current <0.01 %/°C
• For ratings of individual members of a series, see Device Ratings and Specifications chart