Type 418P, Orange Drop®, Polyester Film/Foil Capacitors
General Specifications
The Type 418P Orange Drop® is designed and manufactured for operation in a wide range of demanding envi-
ronments and applications. Type 418P capacitors are wound from the most reliable polyester film and alum-
inum foil available and are protected by a rugged conformal coating of orange epoxy. They may be operated
up to +125°C with proper derating.
The 418P series finds use in many commercial and industrial applications, from power supplies and audio
amplifiers to welding equipment and ultrasonics.
Operating Temperature Range:
Humidity Testing:
The standard operating temperature range for
polyester film is -55°C to +85°C. The 418P
may be operated at full voltage within this
temperature range.
Units subjected to 95% relative humidity for 72
hours with no voltage applied at +75°C. After 4
hours of drying minimum product of insulation
resistance and capacitance shall be 5,000 M⍀-µF
The 418P may be operated up to +105°C
provided the DC working voltage is reduced
to 70% of the +85°C rating (full rating), and
up to +125°C with a 50% reduction from the
+85°C rating (full rating).
DC Voltage Life Test:
500 hours at +85°C at 150% of rated voltage. After
test; capacitance shall not have changed by more
than 5% of initial value, insulation resistance shall
not have decreased by more than 50% of initial value
and dissipation factor shall not have increased to
more than 1.0%. In addition, there should be no
open or short circuits, and no sign of visible damage.
For more specific details regarding operation
above +85°C please contact our design
engineering department.
The maximum operating temperature for the
418P polyester film capacitor is +125°C.
Typical Temperature Characteristics:
Dielectric Withstanding Voltage:
Units rated below 1000 VDC shall withstand a
DC potential of 250% of rated voltage applied
between terminals for not more than 5 seconds.
Units rated at 1000 VDC shall withstand a DC
potential of 200% of rated voltage applied between
terminals for not more than 5 seconds.
AC Voltage Applications:
The A-C component of the 418P's voltage rating
has been specified to assure that corona will not
be encountered when the capacitor is operated
within the noted specifications. We encourage
you to contact us if you have any concerns about
operating voltage, temperature limits, etc.
Lead Bend Test:
After 3 consecutive 180° bends. No damage.
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830