Electron Products Inc.
D SERIES METALLIZED POLYESTER
CAPACITORS
ENGINEERING DATA SHEET and ENVIRONMENTAL DATA
APPLICATIONS
Series D
Metallized Polyester capacitors are superior general purpose capacitors for
both AC and DC applications. They are dry-section, non-polar, non-inductive
wound capacitors with high volumetric efficiency and a low cost.
Series D
Capacitors come in several styles: Oval Wrap & Fill (D Style), Round Wrap
& Fill (DC Style), both in regular and new Flame Retardant Tape; Axial
Epoxy Case (DE Style); Radial Epoxy Case (D2E Style); Rectangular Hermetically
Sealed (DG Style); Round Hermetically Sealed (DL Style); Round Wrapped
Feed-Through (DQ Style). They are available in several sizes as well as custom
sizes to meet specific customer requirements.
Contact our
Engineering Department for special sizes, configurations, capacitance values
and AC applications with Anti-Corona construction at all frequencies. Custom
metal enclosures are available. Custom designed Feed Through capacitors (DQ
Style) are also available for filter applications to specific requirements.
OPERATING
Range: -55°C
to +125°C, with voltage derating.
LIFE TEST
Series D capacitors
shall be capable of withstanding a test of 1000 hours at +125°C and 100% of the
derated DC voltage or a test of 250 hours at +125°C and 140% of the derated DC
voltage. The voltage shall be applied to each capacitor through its individual
current-limiting resistor as determined from the formula R = 0.025/C, where C
is the nominal capacitance in farads and R is in ohms.
The test
procedures shall be in accordance with MIL-C-18312, except as noted herein. Not
more than one failure in twelve shall be permitted. Any one of the following
shall be considered a failure.
a.
A change in capacitance of more than 10% from it's initial
value.
b.
An increase in Dissipation Factor to a value greater than 125%
of the acceptance limit.
c.
A decrease in Insulation Resistance to a value less than 30% of
the acceptance limit for +25°C.
d.
A permanent short or open
VIBRATION
Series D
capacitors shall be capable of withstanding a vibration test in accordance with
MIL-STD-202, Method 201. The following details and exceptions shall
apply:
a.
Mounting. The capacitor body shall be rigidly mounted by
the entire body length to the vibration test fixture. The leads shall be
soldered to rigidly supported terminals and so spaced that the length of each
lead from the capacitor is 1/2 ± 1/8 inch from the edge of the supporting
terminal.
b.
Measurement during Vibration. During the last cycle
in each direction, an electrical measurement shall be made to detect
intermittent contacts (not to be confused with "self healing"
clearings) or open or short circuiting.
c.
Examination After Vibration. Capacitors shall be
visibly examined for evidence of mechanical damage.
MOISTURE
RESISTANCE
Series D
capacitor Styles DG and DL (Hermetically Sealed in metal containers) as well as
Metal Can Styles DB and DC shall be capable of withstanding the moisture
resistance, humidity, and temperature and immersion cycling or MIL-C-18312.
Styles DE and DF (Epoxy Case), Styles DW and DR (Wrap & Fill) and DQ
(Feed-Through) capacitors are not intended for exposure to high humidity
conditions over extended periods of time.
TERMINAL
STRENGTH
Series D
capacitors utilize tin-plated, copper-clad steel wire terminals which shall be
capable of withstanding the following test without mechanical damage to the
capacitor or terminals:
a.
Pull Test. The capacitor shall withstand a steady pull
of 5 pounds axially to the leads for 1 minute.
b.
Bend Test. The wire lead terminals shall be bent at a
point of 1/4 inch from the body of the capacitor, first 90 degrees in one
direction, then back to the original position, and then 90 degrees in the
opposite direction.
Electron
Products Inc.
5367
Phone:
(626) 960-2299 Fax: (626) 814-4434
http://www.ElectronProductsInc.com
Updated: February 24, 2009
Electron URL: http://www.ElectronProductsInc.Com
E-mail: Sales@ElectronProductsInc.Com
Copyright © 2009 Electron
Products Inc. All rights reserved.