Littelfuse CA Varistor Series - Manual (Page 5)

© 2013 Littelfuse, Inc. 185
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
Passivation Layer
The standard CA Series is supplied with passivation
layer around the outside perimeter of the disc forming
an electrical insulator as detailed in the dimensional
drawing. For other options contact factory. (See Ordering
Information)
Encapsulated Recommendations
After lead attachment, the disc/lead assembly may be
coated or encapsulated in a package to provide electrical
insulation and isolation from environmental contamination
as required by the application. Coating/Filler materials for
containers may include silicones, polyurethanes, and some
epoxy resins. Materials containing halogens, sulfides, or
alkalines are not recommended.
Electrode Metallization
CA60 discs are supplied as standard with sintered Silver
electrodes. For other available options please contact
Littelfuse.
Stacking and Contact Pressure Recommendations
When applications require the stacking of CA60 discs,
or when an electrical connection is made by pressure
contacts, the pressure applied to the CA60 disc electrode
surface should be minimum 2.2kgs (5 pounds) and
maximum
4N/CM 2 (5.7LBs/IN 2 ).
Part Numbering System
VARISTOR DESIGNATOR
MAX AC
RMS
WORKING VOLTAGE
(FIRST SIGNIFICANT DIGITS) V
M(AC)
DISC SIZE (mm) DIAMETER
SERIES DESIGNATOR
V
M(AC)
VOLTAGE DECADE MULTIPLIER
V 25 1 CA 60
Packaging and Shipping
The CA Series is supplied in bulk for shipment. Discs are
packaged in compartmentalized cartons to protect from
scratching or edge-chipping during shipment.
No branding or any other type of marking appears on the
CA disc itself.
CA60 discs are supplied as standard with sintered Silver
electrodes and glass passivation. For other available
options please contact factory.
TEMPER
A
TURE (
o
C)
250
200
150
100
50
0
0 100 200 300 400 500 600 700 800 900
TIME (SEC)
Recommended Reflow Temperature Profile